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ad9f180121
freebsd-skq/sys
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Don Lewis ad9f180121 Back out the removal of LK_NOWAIT from the VOP_LOCK() call in 
vlrureclaim() in vfs_subr.c 1.636  because waiting for the vnode
lock aggravates an existing race condition.  It is also undesirable
according to the commit log for 1.631.

Fix the tiny race condition that remains by rechecking the vnode
state after grabbing the vnode lock and grabbing the vnode interlock.

Fix the problem of other threads being starved (which 1.636 attempted
to fix by removing LK_NOWAIT) by calling uio_yield() periodically
in vlrureclaim().  This should be more deterministic than hoping
that VOP_LOCK() without LK_NOWAIT will block, which may not happen
in this loop.

Reviewed by:	kan
MFC after:	5 days
2005-08-23 03:44:06 +00:00
..
alpha Move MINSIGSTKSZ from <machine/signal.h> to <machine/_limits.h> and rename 2005-08-20 16:44:41 +00:00
amd64 Pass the PDE from pmap_remove() to pmap_remove_page() so that the latter 2005-08-22 20:02:40 +00:00
arm Move MINSIGSTKSZ from <machine/signal.h> to <machine/_limits.h> and rename 2005-08-20 16:44:41 +00:00
boot Add a "comconsole_speed" loader variable that can be used to change 2005-08-18 01:39:43 +00:00
bsm For consistency with more system include files, add a trailing '_' to 2005-05-29 16:11:34 +00:00
cam Merge the dev_clone and dev_clone_cred event handlers into a single 2005-08-08 19:55:32 +00:00
coda Merge the dev_clone and dev_clone_cred event handlers into a single 2005-08-08 19:55:32 +00:00
compat Propagate rename of IFF_OACTIVE and IFF_RUNNING to IFF_DRV_OACTIVE and 2005-08-09 10:20:02 +00:00
conf Pad the strings sccs[], version[], and osrelease[] up to a minimum of 2005-08-19 01:49:15 +00:00
contrib Wrap the new world order in __FreeBSD__ to ease future imports. 2005-08-09 11:59:02 +00:00
crypto Add VIA/ACE "PadLock" support as a crypto(9) driver. 2005-08-18 00:30:22 +00:00
ddb Remove the need to forward declare statics by moving them around. 2005-08-10 07:08:14 +00:00
dev On x86 processors, turn off any 'INTERRUPT' capabilities on PMCs 2005-08-22 18:20:41 +00:00
doc
fs Handle device drivers with D_NEEDGIANT in a way which does not 2005-08-17 08:19:52 +00:00
gdb
geom Correct the check if a plex is accessible in case it is not up. 2005-08-22 23:24:26 +00:00
gnu Repair this: 2005-07-09 18:30:31 +00:00
i4b Propagate rename of IFF_OACTIVE and IFF_RUNNING to IFF_DRV_OACTIVE and 2005-08-09 10:20:02 +00:00
i386 Move MINSIGSTKSZ from <machine/signal.h> to <machine/_limits.h> and rename 2005-08-20 16:44:41 +00:00
ia64 Move MINSIGSTKSZ from <machine/signal.h> to <machine/_limits.h> and rename 2005-08-20 16:44:41 +00:00
isa Add pnp and location info for the ISA bus. The pnp info is the 2005-08-01 07:03:10 +00:00
isofs/cd9660 - restore the ability to mount cd9660 filesystems as root by inverting 2005-08-14 04:19:36 +00:00
kern Back out the removal of LK_NOWAIT from the VOP_LOCK() call in 2005-08-23 03:44:06 +00:00
libkern Ha! This is a very interesting bug. 2005-08-08 19:38:00 +00:00
modules Define the target for opt_compat.h only if KERNBUILDDIR 2005-08-18 14:50:08 +00:00
net Introduce two new ioctl(2) commands, BIOCLOCK and BIOCSETWF. These commands 2005-08-22 19:35:48 +00:00
net80211 revert 1.64: we cannot use the channel characteristics to decide when to 2005-08-13 17:50:21 +00:00
netatalk Eliminate MAC entry point mac_create_mbuf_from_mbuf(), which is 2005-07-05 23:39:51 +00:00
netatm Propagate rename of IFF_OACTIVE and IFF_RUNNING to IFF_DRV_OACTIVE and 2005-08-09 10:20:02 +00:00
netgraph Fix multiple typos in the mutex names. This fixes false positive (and pretty 2005-08-23 00:50:59 +00:00
netinet o Fix a logic error when not doing mbuf cluster allocation. 2005-08-22 22:13:41 +00:00
netinet6 added a missing unlock (just do the same thing as in netinet/raw_ip.c) 2005-08-18 11:11:27 +00:00
netipsec Correct typo in a comment describing vshiftl(). 2005-06-02 23:56:10 +00:00
netipx Stop embedding struct ifnet at the top of driver softcs. Instead the 2005-06-10 16:49:24 +00:00
netkey SADB_UPDATE did not return an error when key length is invalid. 2005-08-22 07:05:14 +00:00
netnatm Propagate rename of IFF_OACTIVE and IFF_RUNNING to IFF_DRV_OACTIVE and 2005-08-09 10:20:02 +00:00
netncp Change API of mb_copy_t in libmchain so that netsmb can handle 2005-07-29 13:22:37 +00:00
netsmb Merge the dev_clone and dev_clone_cred event handlers into a single 2005-08-08 19:55:32 +00:00
nfs Fixes for NFS crashes on architectures that require strict alignment. 2005-07-14 20:08:27 +00:00
nfs4client
nfsclient FIx for a bug in the change that made nfs_timer() MPSAFE. We need to 2005-07-27 15:06:26 +00:00
nfsserver
opencrypto Fix bogus check. It was possible to panic the kernel by giving 0 length. 2005-08-18 11:58:03 +00:00
pc98 MFi386: revision 1.1204. 2005-07-21 11:13:12 +00:00
pccard
pci Various fixups to locking: 2005-08-18 19:24:30 +00:00
posix4
powerpc Move MINSIGSTKSZ from <machine/signal.h> to <machine/_limits.h> and rename 2005-08-20 16:44:41 +00:00
rpc
security Insert a series of place-holder function pointers in mac_policy.h for 2005-08-08 16:09:33 +00:00
sparc64 Move MINSIGSTKSZ from <machine/signal.h> to <machine/_limits.h> and rename 2005-08-20 16:44:41 +00:00
sys Move MINSIGSTKSZ from <machine/signal.h> to <machine/_limits.h> and rename 2005-08-20 16:44:41 +00:00
tools Allow EVFILT_VNODE events to work on every filesystem type, not just 2005-06-09 20:20:31 +00:00
ufs Set the mountpoint path in the superblock (fs_fsmnt) at mount-time 2005-08-21 22:06:41 +00:00
vm Do not use vm_pager_init() to initialize vnode_pbuf_freecnt variable. 2005-08-13 20:21:33 +00:00
Makefile