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Default branch: MAIN
Current tag: nick-nhusb-base-20161004
Revision 1.23 / (download) - annotate - [select for diffs], Wed Nov 28 16:26:59 2012 UTC (11 years, 4 months ago) by royger
Branch: MAIN
CVS Tags: yamt-pagecache-base9,
yamt-pagecache-base8,
yamt-pagecache-base7,
tls-maxphys-base-20171202,
tls-maxphys-base,
tls-earlyentropy-base,
tls-earlyentropy,
rmind-smpnet-nbase,
rmind-smpnet-base,
rmind-smpnet,
riastradh-xf86-video-intel-2-7-1-pre-2-21-15,
riastradh-drm2-base3,
riastradh-drm2-base2,
riastradh-drm2-base1,
riastradh-drm2-base,
riastradh-drm2,
prg-localcount2-base3,
prg-localcount2-base2,
prg-localcount2-base1,
prg-localcount2-base,
prg-localcount2,
phil-wifi-base,
phil-wifi-20200406,
phil-wifi-20191119,
phil-wifi-20190609,
pgoyette-localcount-base,
pgoyette-localcount-20170426,
pgoyette-localcount-20170320,
pgoyette-localcount-20170107,
pgoyette-localcount-20161104,
pgoyette-localcount-20160806,
pgoyette-localcount-20160726,
pgoyette-localcount,
pgoyette-compat-merge-20190127,
pgoyette-compat-base,
pgoyette-compat-20190127,
pgoyette-compat-20190118,
pgoyette-compat-1226,
pgoyette-compat-1126,
pgoyette-compat-1020,
pgoyette-compat-0930,
pgoyette-compat-0906,
pgoyette-compat-0728,
pgoyette-compat-0625,
pgoyette-compat-0521,
pgoyette-compat-0502,
pgoyette-compat-0422,
pgoyette-compat-0415,
pgoyette-compat-0407,
pgoyette-compat-0330,
pgoyette-compat-0322,
pgoyette-compat-0315,
pgoyette-compat,
perseant-stdc-iso10646-base,
perseant-stdc-iso10646,
nick-nhusb-base-20170825,
nick-nhusb-base-20170204,
nick-nhusb-base-20161204,
nick-nhusb-base-20161004,
nick-nhusb-base-20160907,
nick-nhusb-base-20160529,
nick-nhusb-base-20160422,
nick-nhusb-base-20160319,
nick-nhusb-base-20151226,
nick-nhusb-base-20150921,
nick-nhusb-base-20150606,
nick-nhusb-base-20150406,
nick-nhusb-base,
nick-nhusb,
netbsd-9-base,
netbsd-9-3-RELEASE,
netbsd-9-2-RELEASE,
netbsd-9-1-RELEASE,
netbsd-9-0-RELEASE,
netbsd-9-0-RC2,
netbsd-9-0-RC1,
netbsd-9,
netbsd-8-base,
netbsd-8-2-RELEASE,
netbsd-8-1-RELEASE,
netbsd-8-1-RC1,
netbsd-8-0-RELEASE,
netbsd-8-0-RC2,
netbsd-8-0-RC1,
netbsd-8,
netbsd-7-nhusb-base-20170116,
netbsd-7-nhusb-base,
netbsd-7-nhusb,
netbsd-7-base,
netbsd-7-2-RELEASE,
netbsd-7-1-RELEASE,
netbsd-7-1-RC2,
netbsd-7-1-RC1,
netbsd-7-1-2-RELEASE,
netbsd-7-1-1-RELEASE,
netbsd-7-1,
netbsd-7-0-RELEASE,
netbsd-7-0-RC3,
netbsd-7-0-RC2,
netbsd-7-0-RC1,
netbsd-7-0-2-RELEASE,
netbsd-7-0-1-RELEASE,
netbsd-7-0,
netbsd-7,
matt-nb8-mediatek-base,
matt-nb8-mediatek,
localcount-20160914,
khorben-n900,
jdolecek-ncq-base,
jdolecek-ncq,
isaki-audio2-base,
isaki-audio2,
is-mlppp-base,
is-mlppp,
bouyer-socketcan-base1,
bouyer-socketcan-base,
bouyer-socketcan,
agc-symver-base,
agc-symver,
ad-namecache-base3,
ad-namecache-base2,
ad-namecache-base1,
ad-namecache-base,
ad-namecache
Branch point for: phil-wifi
Changes since 1.22: +17 -7
lines
Diff to previous 1.22 (colored)
xen: prevent adding duplicate xenwatches When a xenstore watch triggers, the event is processed on process_msg and if a valid handle it's found the handler is queued for execution on the pending xen watches queue (watch_events). This may present a problem if we trigger a xenwatch several times and then disconnect the device. If several xenwatch events are added to the watch_events queue and the device is disconnected afterwards, the first processed xenwatch event will disconnect the device, remove the watch and free all resources. This triggers a panic if there are pending xenwatch events for that device already queued in the local queue of the function xenwatch_thread, since when the next watch that has the same handler tries to execute we get a panic due to the fact that the device is already disconnected and all resources had been freed: xenbus_watch: 0xffffa0000b7cd1d0 xbw_callback: 0xffffffff80755dd4 otherend_changed: backend/vif/1/0 backend/vif/1/0/state 6 backend/vif/1/0 -> Closed backend/vif/1/0 -> backend_device, b_detach: 0xffffffff8075a2bf xenbus_watch: 0xffffa0000b7cd1d0 xbw_callback: 0xfc5ec02183e547a8 fatal protection fault in supervisor mode trap type 4 code 0 rip ffffffff80756596 cs e030 rflags 10246 cr2 7f7ff7b4c020 ilevel 0 rsp ffffa000e6d82c50 curlwp 0xffffa0000a72d580 pid 0 lid 36 lowest kstack 0xffffa000e6d7f000 kernel: protection fault trap, code=0 Stopped in pid 0.36 (system) at netbsd:xenwatch_thread+0xc7: call *10(%rax ) xenwatch_thread() at netbsd:xenwatch_thread+0xc7 ds f es 5987 fs 2c40 gs 1460 rdi ffffa0000b7cd1d0 rsi ffffa0000a5477f0 rbp ffffa000e6d82c70 rbx ffffa0000b7c14c0 rdx 2 rcx f rax ffffa0000b7cd1d0 r8 78 r9 ffffffef r10 deadbeef r11 1 r12 ffffa000e6d82c50 r13 ffffa0000a72d580 r14 ffffa0000a72d580 r15 0 rip ffffffff80756596 xenwatch_thread+0xc7 cs e030 rflags 10246 rsp ffffa000e6d82c50 ss e02b netbsd:xenwatch_thread+0xc7: call *10(%rax)