CVS log for src/sys/uvm/uvm_device.c

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Default branch: MAIN
Current tag: wrstuden-devbsize-19991221

Revision 1.18 / (download) - annotate - [select for diffs], Sat Nov 13 00:24:38 1999 UTC (24 years, 5 months ago) by thorpej
Branch: MAIN
CVS Tags: wrstuden-devbsize-base, wrstuden-devbsize-19991221, fvdl-softdep-base, chs-ubc2-newbase
Changes since 1.17: +19 -5 lines
Diff to previous 1.17 (colored)

Change the pmap_enter() API slightly; pmap_enter() now returns an error
value (KERN_SUCCESS or KERN_RESOURCE_SHORTAGE) indicating if it succeeded
or failed.  Change the `wired' and `access_type' arguments to a single
`flags' argument, which includes the access type, and flags:

	PMAP_WIRED	the old `wired' boolean
	PMAP_CANFAIL	pmap_enter() is allowed to fail

If PMAP_CANFAIL is not specified, the pmap should behave as it always
has in the face of a drastic resource shortage: fall over dead.

Change the fault handler to deal with failure (which indicates resource
shortage) by unlocking everything, waiting for the pagedaemon to free
more memory, then retrying the fault.

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