| version 1.2, 1998/02/19 23:52:14 |
version 1.3, 1998/07/23 20:34:00 |
|
|
| #include <sys/lock.h> |
#include <sys/lock.h> |
| #include <sys/pool.h> |
#include <sys/pool.h> |
| |
|
| |
#include <vm/vm.h> |
| |
#include <vm/vm_kern.h> |
| |
|
| |
#if defined(UVM) |
| |
#include <uvm/uvm.h> |
| |
#endif |
| |
|
| /* |
/* |
| * Pool resource management utility. |
* Pool resource management utility. |
| |
* |
| |
* Memory is allocated in pages which are split into pieces according |
| |
* to the pool item size. Each page is kept on a list headed by `pr_pagelist' |
| |
* in the pool structure and the individual pool items are on a linked list |
| |
* headed by `ph_itemlist' in each page header. The memory for building |
| |
* the page list is either taken from the allocated pages themselves (for |
| |
* small pool items) or taken from an internal pool of page headers (`phpool'). |
| |
* |
| */ |
*/ |
| |
|
| |
/* List of all pools */ |
| |
static TAILQ_HEAD(,pool) pool_head = TAILQ_HEAD_INITIALIZER(pool_head); |
| |
|
| |
/* Private pool for page header structures */ |
| |
static struct pool phpool; |
| |
|
| |
/* # of seconds to retain page after last use */ |
| |
int pool_inactive_time = 10; |
| |
|
| |
/* Next candidate for drainage (see pool_drain()) */ |
| |
static struct pool *drainpp = NULL; |
| |
|
| |
struct pool_item_header { |
| |
/* Page headers */ |
| |
TAILQ_ENTRY(pool_item_header) |
| |
ph_pagelist; /* pool page list */ |
| |
TAILQ_HEAD(,pool_item) ph_itemlist; /* chunk list for this page */ |
| |
LIST_ENTRY(pool_item_header) |
| |
ph_hashlist; /* Off-page page headers */ |
| |
int ph_nmissing; /* # of chunks in use */ |
| |
caddr_t ph_page; /* this page's address */ |
| |
struct timeval ph_time; /* last referenced */ |
| |
}; |
| |
|
| struct pool_item { |
struct pool_item { |
| struct pool_item *pi_next; |
#ifdef DIAGNOSTIC |
| |
int pi_magic; |
| |
#define PI_MAGIC 0xdeadbeef |
| |
#endif |
| |
/* Other entries use only this list entry */ |
| |
TAILQ_ENTRY(pool_item) pi_list; |
| |
}; |
| |
|
| |
|
| |
#define PR_HASH_INDEX(pp,addr) \ |
| |
(((u_long)(addr) >> (pp)->pr_pageshift) & (PR_HASHTABSIZE - 1)) |
| |
|
| |
|
| |
|
| |
static struct pool_item_header |
| |
*pr_find_pagehead __P((struct pool *, caddr_t)); |
| |
static void pr_rmpage __P((struct pool *, struct pool_item_header *)); |
| |
static int pool_prime_page __P((struct pool *, caddr_t)); |
| |
static void *pool_page_alloc __P((unsigned long, int, int)); |
| |
static void pool_page_free __P((void *, unsigned long, int)); |
| |
int pool_chk __P((struct pool *, char *)); |
| |
|
| |
|
| |
#ifdef POOL_DIAGNOSTIC |
| |
/* |
| |
* Pool log entry. An array of these is allocated in pool_create(). |
| |
*/ |
| |
struct pool_log { |
| |
const char *pl_file; |
| |
long pl_line; |
| |
int pl_action; |
| |
#define PRLOG_GET 1 |
| |
#define PRLOG_PUT 2 |
| |
void *pl_addr; |
| }; |
}; |
| |
|
| |
/* Number of entries in pool log buffers */ |
| |
int pool_logsize = 10; |
| |
|
| |
static void pr_log __P((struct pool *, void *, int, const char *, long)); |
| |
static void pr_printlog __P((struct pool *)); |
| |
|
| |
static __inline__ void |
| |
pr_log(pp, v, action, file, line) |
| |
struct pool *pp; |
| |
void *v; |
| |
int action; |
| |
const char *file; |
| |
long line; |
| |
{ |
| |
int n = pp->pr_curlogentry; |
| |
struct pool_log *pl; |
| |
|
| |
if ((pp->pr_flags & PR_LOGGING) == 0) |
| |
return; |
| |
|
| |
/* |
| |
* Fill in the current entry. Wrap around and overwrite |
| |
* the oldest entry if necessary. |
| |
*/ |
| |
pl = &pp->pr_log[n]; |
| |
pl->pl_file = file; |
| |
pl->pl_line = line; |
| |
pl->pl_action = action; |
| |
pl->pl_addr = v; |
| |
if (++n >= pp->pr_logsize) |
| |
n = 0; |
| |
pp->pr_curlogentry = n; |
| |
} |
| |
|
| |
static void |
| |
pr_printlog(pp) |
| |
struct pool *pp; |
| |
{ |
| |
int i = pp->pr_logsize; |
| |
int n = pp->pr_curlogentry; |
| |
|
| |
if ((pp->pr_flags & PR_LOGGING) == 0) |
| |
return; |
| |
|
| |
pool_print(pp, "printlog"); |
| |
|
| |
/* |
| |
* Print all entries in this pool's log. |
| |
*/ |
| |
while (i-- > 0) { |
| |
struct pool_log *pl = &pp->pr_log[n]; |
| |
if (pl->pl_action != 0) { |
| |
printf("log entry %d:\n", i); |
| |
printf("\taction = %s, addr = %p\n", |
| |
pl->pl_action == PRLOG_GET ? "get" : "put", |
| |
pl->pl_addr); |
| |
printf("\tfile: %s at line %lu\n", |
| |
pl->pl_file, pl->pl_line); |
| |
} |
| |
if (++n >= pp->pr_logsize) |
| |
n = 0; |
| |
} |
| |
} |
| |
#else |
| |
#define pr_log(pp, v, action, file, line) |
| |
#define pr_printlog(pp) |
| |
#endif |
| |
|
| |
|
| |
/* |
| |
* Return the pool page header based on page address. |
| |
*/ |
| |
static __inline__ struct pool_item_header * |
| |
pr_find_pagehead(pp, page) |
| |
struct pool *pp; |
| |
caddr_t page; |
| |
{ |
| |
struct pool_item_header *ph; |
| |
|
| |
if ((pp->pr_flags & PR_PHINPAGE) != 0) |
| |
return ((struct pool_item_header *)(page + pp->pr_phoffset)); |
| |
|
| |
for (ph = LIST_FIRST(&pp->pr_hashtab[PR_HASH_INDEX(pp, page)]); |
| |
ph != NULL; |
| |
ph = LIST_NEXT(ph, ph_hashlist)) { |
| |
if (ph->ph_page == page) |
| |
return (ph); |
| |
} |
| |
return (NULL); |
| |
} |
| |
|
| |
/* |
| |
* Remove a page from the pool. |
| |
*/ |
| |
static __inline__ void |
| |
pr_rmpage(pp, ph) |
| |
struct pool *pp; |
| |
struct pool_item_header *ph; |
| |
{ |
| |
|
| |
/* |
| |
* Unlink a page from the pool and release it. |
| |
*/ |
| |
TAILQ_REMOVE(&pp->pr_pagelist, ph, ph_pagelist); |
| |
(*pp->pr_free)(ph->ph_page, pp->pr_pagesz, pp->pr_mtype); |
| |
pp->pr_npages--; |
| |
pp->pr_npagefree++; |
| |
|
| |
if ((pp->pr_flags & PR_PHINPAGE) == 0) { |
| |
LIST_REMOVE(ph, ph_hashlist); |
| |
pool_put(&phpool, ph); |
| |
} |
| |
|
| |
if (pp->pr_curpage == ph) { |
| |
/* |
| |
* Find a new non-empty page header, if any. |
| |
* Start search from the page head, to increase the |
| |
* chance for "high water" pages to be freed. |
| |
*/ |
| |
for (ph = TAILQ_FIRST(&pp->pr_pagelist); ph != NULL; |
| |
ph = TAILQ_NEXT(ph, ph_pagelist)) |
| |
if (TAILQ_FIRST(&ph->ph_itemlist) != NULL) |
| |
break; |
| |
|
| |
pp->pr_curpage = ph; |
| |
} |
| |
} |
| |
|
| |
/* |
| |
* Allocate and initialize a pool. |
| |
*/ |
| struct pool * |
struct pool * |
| pool_create(size, nitems, wchan, mtype, storage) |
pool_create(size, align, ioff, nitems, wchan, pagesz, alloc, release, mtype) |
| size_t size; |
size_t size; |
| |
u_int align; |
| |
u_int ioff; |
| int nitems; |
int nitems; |
| char *wchan; |
char *wchan; |
| |
size_t pagesz; |
| |
void *(*alloc) __P((unsigned long, int, int)); |
| |
void (*release) __P((void *, unsigned long, int)); |
| int mtype; |
int mtype; |
| caddr_t storage; |
|
| { |
{ |
| struct pool *pp; |
struct pool *pp; |
| caddr_t cp; |
int flags; |
| |
|
| if (size < sizeof(struct pool_item)) { |
pp = (struct pool *)malloc(sizeof(*pp), M_POOL, M_NOWAIT); |
| printf("pool_create: size %lu too small\n", (u_long)size); |
if (pp == NULL) |
| return (NULL); |
return (NULL); |
| } |
|
| |
|
| if (storage) { |
flags = PR_FREEHEADER; |
| pp = (struct pool *)storage; |
#ifdef POOL_DIAGNOSTIC |
| cp = (caddr_t)ALIGN(pp + 1); |
if (pool_logsize != 0) |
| } else { |
flags |= PR_LOGGING; |
| pp = (struct pool *)malloc(sizeof(*pp), mtype, M_NOWAIT); |
#endif |
| if (pp == NULL) |
|
| return (NULL); |
|
| cp = NULL; |
|
| } |
|
| |
|
| pp->pr_freelist = NULL; |
pool_init(pp, size, align, ioff, flags, wchan, pagesz, |
| pp->pr_freecount = 0; |
alloc, release, mtype); |
| pp->pr_hiwat = 0; |
|
| pp->pr_flags = (storage ? PR_STATIC : 0); |
|
| pp->pr_size = size; |
|
| pp->pr_wchan = wchan; |
|
| pp->pr_mtype = mtype; |
|
| simple_lock_init(&pp->pr_lock); |
|
| |
|
| if (nitems != 0) { |
if (nitems != 0) { |
| if (pool_prime(pp, nitems, cp) != 0) { |
if (pool_prime(pp, nitems, NULL) != 0) { |
| pool_destroy(pp); |
pool_destroy(pp); |
| return (NULL); |
return (NULL); |
| } |
} |
| Line 100 pool_create(size, nitems, wchan, mtype, |
|
| Line 295 pool_create(size, nitems, wchan, mtype, |
|
| } |
} |
| |
|
| /* |
/* |
| |
* Initialize the given pool resource structure. |
| |
* |
| |
* We export this routine to allow other kernel parts to declare |
| |
* static pools that must be initialized before malloc() is available. |
| |
*/ |
| |
void |
| |
pool_init(pp, size, align, ioff, flags, wchan, pagesz, alloc, release, mtype) |
| |
struct pool *pp; |
| |
size_t size; |
| |
u_int align; |
| |
u_int ioff; |
| |
int flags; |
| |
char *wchan; |
| |
size_t pagesz; |
| |
void *(*alloc) __P((unsigned long, int, int)); |
| |
void (*release) __P((void *, unsigned long, int)); |
| |
int mtype; |
| |
{ |
| |
int off, slack; |
| |
|
| |
/* |
| |
* Check arguments and construct default values. |
| |
*/ |
| |
if (!powerof2(pagesz) || pagesz > PAGE_SIZE) |
| |
panic("pool_init: page size invalid (%lx)\n", (u_long)pagesz); |
| |
|
| |
if (alloc == NULL) |
| |
alloc = pool_page_alloc; |
| |
|
| |
if (release == NULL) |
| |
release = pool_page_free; |
| |
|
| |
if (pagesz == 0) |
| |
pagesz = PAGE_SIZE; |
| |
|
| |
if (align == 0) |
| |
align = ALIGN(1); |
| |
|
| |
/* |
| |
* Initialize the pool structure. |
| |
*/ |
| |
TAILQ_INSERT_TAIL(&pool_head, pp, pr_poollist); |
| |
TAILQ_INIT(&pp->pr_pagelist); |
| |
pp->pr_curpage = NULL; |
| |
pp->pr_npages = 0; |
| |
pp->pr_minitems = 0; |
| |
pp->pr_minpages = 0; |
| |
pp->pr_maxpages = UINT_MAX; |
| |
pp->pr_flags = flags; |
| |
pp->pr_size = ALIGN(size); |
| |
pp->pr_align = align; |
| |
pp->pr_wchan = wchan; |
| |
pp->pr_mtype = mtype; |
| |
pp->pr_alloc = alloc; |
| |
pp->pr_free = release; |
| |
pp->pr_pagesz = pagesz; |
| |
pp->pr_pagemask = ~(pagesz - 1); |
| |
pp->pr_pageshift = ffs(pagesz) - 1; |
| |
|
| |
/* |
| |
* Decide whether to put the page header off page to avoid |
| |
* wasting too large a part of the page. Off-page page headers |
| |
* go on a hash table, so we can match a returned item |
| |
* with its header based on the page address. |
| |
* We use 1/16 of the page size as the threshold (XXX: tune) |
| |
*/ |
| |
if (pp->pr_size < pagesz/16) { |
| |
/* Use the end of the page for the page header */ |
| |
pp->pr_flags |= PR_PHINPAGE; |
| |
pp->pr_phoffset = off = |
| |
pagesz - ALIGN(sizeof(struct pool_item_header)); |
| |
} else { |
| |
/* The page header will be taken from our page header pool */ |
| |
pp->pr_phoffset = 0; |
| |
off = pagesz; |
| |
bzero(pp->pr_hashtab, sizeof(pp->pr_hashtab)); |
| |
} |
| |
|
| |
/* |
| |
* Alignment is to take place at `ioff' within the item. This means |
| |
* we must reserve up to `align - 1' bytes on the page to allow |
| |
* appropriate positioning of each item. |
| |
* |
| |
* Silently enforce `0 <= ioff < align'. |
| |
*/ |
| |
pp->pr_itemoffset = ioff = ioff % align; |
| |
pp->pr_itemsperpage = (off - ((align - ioff) % align)) / pp->pr_size; |
| |
|
| |
/* |
| |
* Use the slack between the chunks and the page header |
| |
* for "cache coloring". |
| |
*/ |
| |
slack = off - pp->pr_itemsperpage * pp->pr_size; |
| |
pp->pr_maxcolor = (slack / align) * align; |
| |
pp->pr_curcolor = 0; |
| |
|
| |
pp->pr_nget = 0; |
| |
pp->pr_nfail = 0; |
| |
pp->pr_nput = 0; |
| |
pp->pr_npagealloc = 0; |
| |
pp->pr_npagefree = 0; |
| |
pp->pr_hiwat = 0; |
| |
|
| |
#ifdef POOL_DIAGNOSTIC |
| |
if ((flags & PR_LOGGING) != 0) { |
| |
pp->pr_log = malloc(pool_logsize * sizeof(struct pool_log), |
| |
M_TEMP, M_NOWAIT); |
| |
if (pp->pr_log == NULL) |
| |
pp->pr_flags &= ~PR_LOGGING; |
| |
pp->pr_curlogentry = 0; |
| |
pp->pr_logsize = pool_logsize; |
| |
} |
| |
#endif |
| |
|
| |
simple_lock_init(&pp->pr_lock); |
| |
|
| |
/* |
| |
* Initialize private page header pool if we haven't done so yet. |
| |
*/ |
| |
if (phpool.pr_size == 0) { |
| |
pool_init(&phpool, sizeof(struct pool_item_header), 0, 0, |
| |
0, "phpool", 0, 0, 0, 0); |
| |
} |
| |
|
| |
return; |
| |
} |
| |
|
| |
/* |
| * De-commision a pool resource. |
* De-commision a pool resource. |
| */ |
*/ |
| void |
void |
| pool_destroy(pp) |
pool_destroy(pp) |
| struct pool *pp; |
struct pool *pp; |
| { |
{ |
| struct pool_item *pi; |
struct pool_item_header *ph; |
| |
|
| if (pp->pr_flags & PR_STATIC) |
#ifdef DIAGNOSTIC |
| return; |
if (pp->pr_nget - pp->pr_nput != 0) { |
| |
pr_printlog(pp); |
| while ((pi = pp->pr_freelist) != NULL) { |
panic("pool_destroy: pool busy: still out: %lu\n", |
| pp->pr_freelist = pi->pi_next; |
pp->pr_nget - pp->pr_nput); |
| free(pi, pp->pr_mtype); |
|
| } |
} |
| free(pp, pp->pr_mtype); |
#endif |
| |
|
| |
/* Remove all pages */ |
| |
if ((pp->pr_flags & PR_STATIC) == 0) |
| |
while ((ph = pp->pr_pagelist.tqh_first) != NULL) |
| |
pr_rmpage(pp, ph); |
| |
|
| |
/* Remove from global pool list */ |
| |
TAILQ_REMOVE(&pool_head, pp, pr_poollist); |
| |
drainpp = NULL; |
| |
|
| |
#ifdef POOL_DIAGNOSTIC |
| |
if ((pp->pr_flags & PR_LOGGING) != 0) |
| |
free(pp->pr_log, M_TEMP); |
| |
#endif |
| |
|
| |
if (pp->pr_flags & PR_FREEHEADER) |
| |
free(pp, M_POOL); |
| } |
} |
| |
|
| |
|
| /* |
/* |
| * Grab an item from the pool; must be called at splbio |
* Grab an item from the pool; must be called at appropriate spl level |
| */ |
*/ |
| |
#ifdef POOL_DIAGNOSTIC |
| |
void * |
| |
_pool_get(pp, flags, file, line) |
| |
struct pool *pp; |
| |
int flags; |
| |
const char *file; |
| |
long line; |
| |
#else |
| void * |
void * |
| pool_get(pp, flags) |
pool_get(pp, flags) |
| struct pool *pp; |
struct pool *pp; |
| int flags; |
int flags; |
| |
#endif |
| { |
{ |
| void *v; |
void *v; |
| struct pool_item *pi; |
struct pool_item *pi; |
| |
struct pool_item_header *ph; |
| |
|
| #ifdef DIAGNOSTIC |
#ifdef DIAGNOSTIC |
| if ((pp->pr_flags & PR_STATIC) && (flags & PR_MALLOCOK)) |
if ((pp->pr_flags & PR_STATIC) && (flags & PR_MALLOCOK)) { |
| |
pr_printlog(pp); |
| panic("pool_get: static"); |
panic("pool_get: static"); |
| |
} |
| #endif |
#endif |
| |
|
| again: |
|
| simple_lock(&pp->pr_lock); |
simple_lock(&pp->pr_lock); |
| if ((v = pp->pr_freelist) == NULL) { |
if (curproc == NULL && (flags & PR_WAITOK) != 0) |
| if (flags & PR_MALLOCOK) |
panic("pool_get: must have NOWAIT"); |
| v = (void *)malloc(pp->pr_size, pp->pr_mtype, M_NOWAIT); |
|
| |
|
| |
/* |
| |
* The convention we use is that if `curpage' is not NULL, then |
| |
* it points at a non-empty bucket. In particular, `curpage' |
| |
* never points at a page header which has PR_PHINPAGE set and |
| |
* has no items in its bucket. |
| |
*/ |
| |
again: |
| |
if ((ph = pp->pr_curpage) == NULL) { |
| |
void *v = (*pp->pr_alloc)(pp->pr_pagesz, flags, pp->pr_mtype); |
| if (v == NULL) { |
if (v == NULL) { |
| if ((flags & PR_WAITOK) == 0) |
if (flags & PR_URGENT) |
| |
panic("pool_get: urgent"); |
| |
if ((flags & PR_WAITOK) == 0) { |
| |
pp->pr_nfail++; |
| |
simple_unlock(&pp->pr_lock); |
| return (NULL); |
return (NULL); |
| |
} |
| |
|
| pp->pr_flags |= PR_WANTED; |
pp->pr_flags |= PR_WANTED; |
| simple_unlock(&pp->pr_lock); |
simple_unlock(&pp->pr_lock); |
| tsleep((caddr_t)pp, PSWP, pp->pr_wchan, 0); |
tsleep((caddr_t)pp, PSWP, pp->pr_wchan, 0); |
| goto again; |
simple_lock(&pp->pr_lock); |
| |
} else { |
| |
pp->pr_npagealloc++; |
| |
pool_prime_page(pp, v); |
| } |
} |
| } else { |
|
| pi = v; |
goto again; |
| pp->pr_freelist = pi->pi_next; |
|
| pp->pr_freecount--; |
|
| } |
} |
| |
|
| |
if ((v = pi = TAILQ_FIRST(&ph->ph_itemlist)) == NULL) |
| |
panic("pool_get: %s: page empty", pp->pr_wchan); |
| |
|
| |
pr_log(pp, v, PRLOG_GET, file, line); |
| |
|
| |
#ifdef DIAGNOSTIC |
| |
if (pi->pi_magic != PI_MAGIC) { |
| |
pr_printlog(pp); |
| |
panic("pool_get(%s): free list modified: magic=%x; page %p;" |
| |
" item addr %p\n", |
| |
pp->pr_wchan, pi->pi_magic, ph->ph_page, pi); |
| |
} |
| |
#endif |
| |
|
| |
/* |
| |
* Remove from item list. |
| |
*/ |
| |
TAILQ_REMOVE(&ph->ph_itemlist, pi, pi_list); |
| |
ph->ph_nmissing++; |
| |
if (TAILQ_FIRST(&ph->ph_itemlist) == NULL) { |
| |
/* |
| |
* Find a new non-empty page header, if any. |
| |
* Start search from the page head, to increase |
| |
* the chance for "high water" pages to be freed. |
| |
* |
| |
* First, move the now empty page to the head of |
| |
* the page list. |
| |
*/ |
| |
TAILQ_REMOVE(&pp->pr_pagelist, ph, ph_pagelist); |
| |
TAILQ_INSERT_HEAD(&pp->pr_pagelist, ph, ph_pagelist); |
| |
while ((ph = TAILQ_NEXT(ph, ph_pagelist)) != NULL) |
| |
if (TAILQ_FIRST(&ph->ph_itemlist) != NULL) |
| |
break; |
| |
|
| |
pp->pr_curpage = ph; |
| |
} |
| |
|
| |
pp->pr_nget++; |
| simple_unlock(&pp->pr_lock); |
simple_unlock(&pp->pr_lock); |
| return (v); |
return (v); |
| } |
} |
| |
|
| /* |
/* |
| * Return resource to the pool; must be called at splbio |
* Return resource to the pool; must be called at appropriate spl level |
| */ |
*/ |
| |
#ifdef POOL_DIAGNOSTIC |
| |
void |
| |
_pool_put(pp, v, file, line) |
| |
struct pool *pp; |
| |
void *v; |
| |
const char *file; |
| |
long line; |
| |
#else |
| void |
void |
| pool_put(pp, v) |
pool_put(pp, v) |
| struct pool *pp; |
struct pool *pp; |
| void *v; |
void *v; |
| |
#endif |
| { |
{ |
| struct pool_item *pi = v; |
struct pool_item *pi = v; |
| |
struct pool_item_header *ph; |
| |
caddr_t page; |
| |
|
| |
page = (caddr_t)((u_long)v & pp->pr_pagemask); |
| |
|
| simple_lock(&pp->pr_lock); |
simple_lock(&pp->pr_lock); |
| if ((pp->pr_flags & PR_WANTED) || pp->pr_freecount < pp->pr_hiwat) { |
|
| /* Return to pool */ |
pr_log(pp, v, PRLOG_PUT, file, line); |
| pi->pi_next = pp->pr_freelist; |
|
| pp->pr_freelist = pi; |
if ((ph = pr_find_pagehead(pp, page)) == NULL) { |
| pp->pr_freecount++; |
pr_printlog(pp); |
| if (pp->pr_flags & PR_WANTED) { |
panic("pool_put: %s: page header missing", pp->pr_wchan); |
| pp->pr_flags &= ~PR_WANTED; |
} |
| wakeup((caddr_t)pp); |
|
| } |
/* |
| } else { |
* Return to item list. |
| |
*/ |
| #ifdef DIAGNOSTIC |
#ifdef DIAGNOSTIC |
| if (pp->pr_flags & PR_STATIC) { |
pi->pi_magic = PI_MAGIC; |
| /* can't happen because hiwat > freecount */ |
|
| panic("pool_put: static"); |
|
| } |
|
| #endif |
#endif |
| /* Return to system */ |
TAILQ_INSERT_HEAD(&ph->ph_itemlist, pi, pi_list); |
| free(v, M_DEVBUF); |
ph->ph_nmissing--; |
| |
pp->pr_nput++; |
| |
|
| |
/* Cancel "pool empty" condition if it exists */ |
| |
if (pp->pr_curpage == NULL) |
| |
pp->pr_curpage = ph; |
| |
|
| |
if (pp->pr_flags & PR_WANTED) { |
| |
pp->pr_flags &= ~PR_WANTED; |
| |
wakeup((caddr_t)pp); |
| |
simple_unlock(&pp->pr_lock); |
| |
return; |
| |
} |
| |
|
| /* |
/* |
| * Return any excess items allocated during periods of |
* If this page is now complete, move it to the end of the pagelist. |
| * contention. |
* If this page has just become un-empty, move it the head. |
| */ |
*/ |
| while (pp->pr_freecount > pp->pr_hiwat) { |
if (ph->ph_nmissing == 0) { |
| pi = pp->pr_freelist; |
if (pp->pr_npages > pp->pr_maxpages) { |
| pp->pr_freelist = pi->pi_next; |
#if 0 |
| pp->pr_freecount--; |
timeout(pool_drain, 0, pool_inactive_time*hz); |
| free(pi, M_DEVBUF); |
#else |
| |
pr_rmpage(pp, ph); |
| |
#endif |
| |
} else { |
| |
TAILQ_REMOVE(&pp->pr_pagelist, ph, ph_pagelist); |
| |
TAILQ_INSERT_TAIL(&pp->pr_pagelist, ph, ph_pagelist); |
| |
ph->ph_time = time; |
| |
|
| |
/* XXX - update curpage */ |
| |
for (ph = TAILQ_FIRST(&pp->pr_pagelist); ph != NULL; |
| |
ph = TAILQ_NEXT(ph, ph_pagelist)) |
| |
if (TAILQ_FIRST(&ph->ph_itemlist) != NULL) |
| |
break; |
| |
|
| |
pp->pr_curpage = ph; |
| } |
} |
| } |
} |
| |
|
| simple_unlock(&pp->pr_lock); |
simple_unlock(&pp->pr_lock); |
| } |
} |
| |
|
| /* |
/* |
| * Add N items to the pool |
* Add N items to the pool. |
| */ |
*/ |
| int |
int |
| pool_prime(pp, n, storage) |
pool_prime(pp, n, storage) |
| Line 211 pool_prime(pp, n, storage) |
|
| Line 653 pool_prime(pp, n, storage) |
|
| int n; |
int n; |
| caddr_t storage; |
caddr_t storage; |
| { |
{ |
| struct pool_item *pi; |
caddr_t cp; |
| caddr_t cp = storage; |
int newnitems, newpages; |
| |
|
| #ifdef DIAGNOSTIC |
#ifdef DIAGNOSTIC |
| if (storage && !(pp->pr_flags & PR_STATIC)) |
if (storage && !(pp->pr_flags & PR_STATIC)) |
| Line 220 pool_prime(pp, n, storage) |
|
| Line 662 pool_prime(pp, n, storage) |
|
| /* !storage && static caught below */ |
/* !storage && static caught below */ |
| #endif |
#endif |
| |
|
| |
newnitems = pp->pr_minitems + n; |
| |
newpages = |
| |
roundup(pp->pr_itemsperpage,newnitems) / pp->pr_itemsperpage |
| |
- pp->pr_minpages; |
| |
|
| simple_lock(&pp->pr_lock); |
simple_lock(&pp->pr_lock); |
| pp->pr_hiwat += n; |
while (newpages-- > 0) { |
| while (n--) { |
|
| if (pp->pr_flags & PR_STATIC) { |
if (pp->pr_flags & PR_STATIC) { |
| pi = (struct pool_item *)cp; |
cp = storage; |
| cp = (caddr_t)ALIGN(cp + pp->pr_size); |
storage += pp->pr_pagesz; |
| } else |
} else { |
| pi = malloc(pp->pr_size, pp->pr_mtype, M_NOWAIT); |
cp = (*pp->pr_alloc)(pp->pr_pagesz, 0, pp->pr_mtype); |
| |
} |
| |
|
| if (pi == NULL) { |
if (cp == NULL) { |
| simple_unlock(&pp->pr_lock); |
simple_unlock(&pp->pr_lock); |
| return (ENOMEM); |
return (ENOMEM); |
| } |
} |
| |
|
| pi->pi_next = pp->pr_freelist; |
pool_prime_page(pp, cp); |
| pp->pr_freelist = pi; |
pp->pr_minpages++; |
| pp->pr_freecount++; |
|
| } |
} |
| |
|
| |
pp->pr_minitems = newnitems; |
| |
|
| |
if (pp->pr_minpages >= pp->pr_maxpages) |
| |
pp->pr_maxpages = pp->pr_minpages + 1; /* XXX */ |
| |
|
| simple_unlock(&pp->pr_lock); |
simple_unlock(&pp->pr_lock); |
| return (0); |
return (0); |
| } |
} |
| |
|
| |
/* |
| |
* Add a page worth of items to the pool. |
| |
*/ |
| |
int |
| |
pool_prime_page(pp, storage) |
| |
struct pool *pp; |
| |
caddr_t storage; |
| |
{ |
| |
struct pool_item *pi; |
| |
struct pool_item_header *ph; |
| |
caddr_t cp = storage; |
| |
unsigned int align = pp->pr_align; |
| |
unsigned int ioff = pp->pr_itemoffset; |
| |
int n; |
| |
|
| |
if ((pp->pr_flags & PR_PHINPAGE) != 0) { |
| |
ph = (struct pool_item_header *)(cp + pp->pr_phoffset); |
| |
} else { |
| |
ph = pool_get(&phpool, PR_URGENT); |
| |
LIST_INSERT_HEAD(&pp->pr_hashtab[PR_HASH_INDEX(pp, cp)], |
| |
ph, ph_hashlist); |
| |
} |
| |
|
| |
/* |
| |
* Insert page header. |
| |
*/ |
| |
TAILQ_INSERT_HEAD(&pp->pr_pagelist, ph, ph_pagelist); |
| |
TAILQ_INIT(&ph->ph_itemlist); |
| |
ph->ph_page = storage; |
| |
ph->ph_nmissing = 0; |
| |
ph->ph_time.tv_sec = ph->ph_time.tv_usec = 0; |
| |
|
| |
/* |
| |
* Color this page. |
| |
*/ |
| |
cp = (caddr_t)(cp + pp->pr_curcolor); |
| |
if ((pp->pr_curcolor += align) > pp->pr_maxcolor) |
| |
pp->pr_curcolor = 0; |
| |
|
| |
/* |
| |
* Adjust storage to apply aligment to `pr_itemoffset' in each item. |
| |
*/ |
| |
if (ioff != 0) |
| |
cp = (caddr_t)(cp + (align - ioff)); |
| |
|
| |
/* |
| |
* Insert remaining chunks on the bucket list. |
| |
*/ |
| |
n = pp->pr_itemsperpage; |
| |
|
| |
while (n--) { |
| |
pi = (struct pool_item *)cp; |
| |
|
| |
/* Insert on page list */ |
| |
TAILQ_INSERT_TAIL(&ph->ph_itemlist, pi, pi_list); |
| |
#ifdef DIAGNOSTIC |
| |
pi->pi_magic = PI_MAGIC; |
| |
#endif |
| |
cp = (caddr_t)(cp + pp->pr_size); |
| |
} |
| |
|
| |
/* |
| |
* If the pool was depleted, point at the new page. |
| |
*/ |
| |
if (pp->pr_curpage == NULL) |
| |
pp->pr_curpage = ph; |
| |
|
| |
if (++pp->pr_npages > pp->pr_hiwat) |
| |
pp->pr_hiwat = pp->pr_npages; |
| |
|
| |
return (0); |
| |
} |
| |
|
| |
void |
| |
pool_setlowat(pp, n) |
| |
pool_handle_t pp; |
| |
int n; |
| |
{ |
| |
pp->pr_minitems = n; |
| |
if (n == 0) { |
| |
pp->pr_minpages = 0; |
| |
return; |
| |
} |
| |
pp->pr_minpages = |
| |
roundup(pp->pr_itemsperpage,n) / pp->pr_itemsperpage; |
| |
} |
| |
|
| |
void |
| |
pool_sethiwat(pp, n) |
| |
pool_handle_t pp; |
| |
int n; |
| |
{ |
| |
if (n == 0) { |
| |
pp->pr_maxpages = 0; |
| |
return; |
| |
} |
| |
pp->pr_maxpages = |
| |
roundup(pp->pr_itemsperpage,n) / pp->pr_itemsperpage; |
| |
} |
| |
|
| |
|
| |
/* |
| |
* Default page allocator. |
| |
*/ |
| |
static void * |
| |
pool_page_alloc(sz, flags, mtype) |
| |
unsigned long sz; |
| |
int flags; |
| |
int mtype; |
| |
{ |
| |
vm_offset_t va; |
| |
|
| |
#if defined(UVM) |
| |
va = uvm_km_kmemalloc(kernel_map, uvm.kernel_object, |
| |
(vm_size_t)sz, UVM_KMF_NOWAIT); |
| |
#else |
| |
va = kmem_malloc(kmem_map, (vm_size_t)sz, 0); |
| |
#endif |
| |
return ((void *)va); |
| |
} |
| |
|
| |
static void |
| |
pool_page_free(v, sz, mtype) |
| |
void *v; |
| |
unsigned long sz; |
| |
int mtype; |
| |
{ |
| |
|
| |
#if defined(UVM) |
| |
uvm_km_free(kernel_map, (vm_offset_t)v, sz); |
| |
#else |
| |
kmem_free(kmem_map, (vm_offset_t)v, sz); |
| |
#endif |
| |
} |
| |
|
| |
/* |
| |
* Release all complete pages that have not been used recently. |
| |
*/ |
| |
void |
| |
pool_reclaim (pp) |
| |
pool_handle_t pp; |
| |
{ |
| |
struct pool_item_header *ph, *phnext; |
| |
struct timeval curtime = time; |
| |
|
| |
if (pp->pr_flags & PR_STATIC) |
| |
return; |
| |
|
| |
if (simple_lock_try(&pp->pr_lock) == 0) |
| |
return; |
| |
|
| |
for (ph = TAILQ_FIRST(&pp->pr_pagelist); ph != NULL; ph = phnext) { |
| |
phnext = TAILQ_NEXT(ph, ph_pagelist); |
| |
|
| |
/* Check our minimum page claim */ |
| |
if (pp->pr_npages <= pp->pr_minpages) |
| |
break; |
| |
|
| |
if (ph->ph_nmissing == 0) { |
| |
struct timeval diff; |
| |
timersub(&curtime, &ph->ph_time, &diff); |
| |
if (diff.tv_sec < pool_inactive_time) |
| |
continue; |
| |
pr_rmpage(pp, ph); |
| |
} |
| |
} |
| |
|
| |
simple_unlock(&pp->pr_lock); |
| |
} |
| |
|
| |
|
| |
/* |
| |
* Drain pools, one at a time. |
| |
*/ |
| |
void |
| |
pool_drain(arg) |
| |
void *arg; |
| |
{ |
| |
struct pool *pp; |
| |
int s = splimp(); |
| |
|
| |
/* XXX:lock pool head */ |
| |
if (drainpp == NULL && (drainpp = TAILQ_FIRST(&pool_head)) == NULL) { |
| |
splx(s); |
| |
return; |
| |
} |
| |
|
| |
pp = drainpp; |
| |
drainpp = TAILQ_NEXT(pp, pr_poollist); |
| |
/* XXX:unlock pool head */ |
| |
|
| |
pool_reclaim(pp); |
| |
splx(s); |
| |
} |
| |
|
| |
|
| |
#ifdef DEBUG |
| |
/* |
| |
* Diagnostic helpers. |
| |
*/ |
| |
void |
| |
pool_print(pp, label) |
| |
struct pool *pp; |
| |
char *label; |
| |
{ |
| |
|
| |
if (label != NULL) |
| |
printf("%s: ", label); |
| |
|
| |
printf("pool %s: nalloc %lu nfree %lu npagealloc %lu npagefree %lu\n" |
| |
" npages %u minitems %u itemsperpage %u itemoffset %u\n", |
| |
pp->pr_wchan, |
| |
pp->pr_nget, |
| |
pp->pr_nput, |
| |
pp->pr_npagealloc, |
| |
pp->pr_npagefree, |
| |
pp->pr_npages, |
| |
pp->pr_minitems, |
| |
pp->pr_itemsperpage, |
| |
pp->pr_itemoffset); |
| |
} |
| |
|
| |
int |
| |
pool_chk(pp, label) |
| |
struct pool *pp; |
| |
char *label; |
| |
{ |
| |
struct pool_item_header *ph; |
| |
int r = 0; |
| |
|
| |
simple_lock(&pp->pr_lock); |
| |
|
| |
for (ph = TAILQ_FIRST(&pp->pr_pagelist); ph != NULL; |
| |
ph = TAILQ_NEXT(ph, ph_pagelist)) { |
| |
|
| |
struct pool_item *pi; |
| |
int n; |
| |
caddr_t page; |
| |
|
| |
page = (caddr_t)((u_long)ph & pp->pr_pagemask); |
| |
if (page != ph->ph_page) { |
| |
if (label != NULL) |
| |
printf("%s: ", label); |
| |
printf("pool(%s): page inconsistency: page %p;" |
| |
" at page head addr %p (p %p)\n", |
| |
pp->pr_wchan, ph->ph_page, |
| |
ph, page); |
| |
r++; |
| |
goto out; |
| |
} |
| |
|
| |
for (pi = TAILQ_FIRST(&ph->ph_itemlist), n = 0; |
| |
pi != NULL; |
| |
pi = TAILQ_NEXT(pi,pi_list), n++) { |
| |
|
| |
#ifdef DIAGNOSTIC |
| |
if (pi->pi_magic != PI_MAGIC) { |
| |
if (label != NULL) |
| |
printf("%s: ", label); |
| |
printf("pool(%s): free list modified: magic=%x;" |
| |
" page %p; item ordinal %d;" |
| |
" addr %p (p %p)\n", |
| |
pp->pr_wchan, pi->pi_magic, ph->ph_page, |
| |
n, pi, page); |
| |
panic("pool"); |
| |
} |
| |
#endif |
| |
page = (caddr_t)((u_long)pi & pp->pr_pagemask); |
| |
if (page == ph->ph_page) |
| |
continue; |
| |
|
| |
if (label != NULL) |
| |
printf("%s: ", label); |
| |
printf("pool(%s): page inconsistency: page %p;" |
| |
" item ordinal %d; addr %p (p %p)\n", |
| |
pp->pr_wchan, ph->ph_page, |
| |
n, pi, page); |
| |
r++; |
| |
goto out; |
| |
} |
| |
} |
| |
out: |
| |
simple_unlock(&pp->pr_lock); |
| |
return (r); |
| |
} |
| |
#endif |