Stephan Uphoff 224409590d When the VM needs to allocated physical memory pages (for non interrupt use) ... and it has not plenty of free pages it tries to free pages in the cache queue. Unfortunately freeing a cached page requires the locking of the object that owns the page. However in the context of allocating pages we may not be able to lock the object and thus can only TRY to lock the object. If the locking try fails the cache page can not be freed and is activated to move it out of the way so that we may try to free other cache pages. If all pages in the cache belong to objects that are currently locked the cache queue can be emptied without freeing a single page. This scenario caused two problems: 1) vm_page_alloc always failed allocation when it tried freeing pages from the cache queue and failed to do so. However if there are more than cnt.v_interrupt_free_min pages on the free list it should return pages when requested with priority VM_ALLOC_SYSTEM. Failure to do so can cause resource exhaustion deadlocks. 2) Threads than need to allocate pages spend a lot of time cleaning up the page queue without really getting anything done while the pagedaemon needs to work overtime to refill the cache. This change fixes the first problem. (1) Reviewed by: tegge@		2006-02-15 22:29:53 +00:00
..
alpha	Fix the hw.realmem sysctl. The global realmem variable is a count of	2006-02-14 14:50:11 +00:00
amd64	It seems bit 5 of cpu_feature2 is the VMX (Virtual Machine Extensions)	2006-02-15 14:48:59 +00:00
arm	Use the correct address for the ohci device.	2006-02-11 03:58:07 +00:00
boot	Remove ELF dynamic tag definitions that aren't used. Ideally,	2006-01-18 18:49:25 +00:00
bsm	Merge OpenBSM 1.0 alpha 3 include file changes from contrib/openbsm/bsm	2006-02-06 01:12:46 +00:00
cam	- Add a scsi_da.c and a umass.c quirk for Genesys 6-in-1 Card Reader.	2006-01-30 20:27:44 +00:00
coda	- Reorder calls to vrele() after calls to vput() when the vrele is a	2006-02-01 00:25:26 +00:00
compat	- Always call exec_free_args() in kern_execve() instead of doing it in all	2006-02-06 22:06:54 +00:00
conf	Tie the ipmi driver into the i386/amd64 builds.	2006-02-13 17:56:24 +00:00
contrib	resolve merge conflicts	2006-02-10 19:01:02 +00:00
crypto
ddb	Fix -Wundef.	2005-12-04 02:12:43 +00:00
dev	drop softc lock around copyin/copyout	2006-02-15 18:36:52 +00:00
doc
fs	Correctly set MNTK_MPSAFE flag from the lower vnode's mount rather than	2006-02-10 18:06:49 +00:00
gdb
geom	On component state change to ACTIVE don't forget to update metadata.	2006-02-12 17:38:09 +00:00
gnu	Add marker vnodes to ensure that all vnodes associated with the mount point are	2006-01-09 20:42:19 +00:00
i4b	Fix -Wundef warnings found when compiling i386 LINT, GENERIC and	2005-12-05 11:58:35 +00:00
i386	It seems bit 5 of cpu_feature2 is the VMX (Virtual Machine Extensions)	2006-02-15 14:48:59 +00:00
ia64	Fix the hw.realmem sysctl. The global realmem variable is a count of	2006-02-14 14:50:11 +00:00
isa	Tweak how the MD code calls the fooclock() methods some. Instead of	2005-12-22 22:16:09 +00:00
isofs/cd9660	I ran into an nfs client panic a couple of times in a row over the	2006-01-17 17:29:03 +00:00
kern	Audit the arguments to the ptrace(2) system call.	2006-02-14 01:18:31 +00:00
libkern	Convert function declarations to ANSI C.	2006-01-22 00:46:40 +00:00
modules	Disable the ipmi driver on pc98.	2006-02-14 12:55:07 +00:00
net	Fix build.	2006-02-15 08:25:40 +00:00
net80211	o make driver override of net80211 parameter state consistent	2006-02-14 17:48:56 +00:00
netatalk	- Store pointer to the link-level address right in "struct ifnet"	2005-11-11 16:04:59 +00:00
netatm	Convert to ANSI C function declarations.	2006-01-22 01:07:11 +00:00
netgraph	Unbreak this.	2006-02-14 15:22:24 +00:00
netinet	When sending a packet from dummynet, indicate that we're forwarding	2006-02-14 06:36:39 +00:00
netinet6	avoided the use of purged address structure when an address became	2006-02-12 15:37:08 +00:00
netipsec	Fix stack corruptions on amd64.	2006-01-21 10:44:34 +00:00
netipx	In spx_attach() and spx_detach(), there is no need to check whether the	2006-01-14 00:05:44 +00:00
netkey	Fix stack corruptions on amd64.	2006-01-21 10:44:34 +00:00
netnatm	Use sparse initializers for "struct domain" and "struct protosw",	2005-11-09 13:29:16 +00:00
netncp	In ncp_sysctl_connstat(), the SLIST_FOREACH() logic to check 'error'	2006-01-14 11:40:32 +00:00
netsmb	Although we check the return value of copyin(9) while determaining how	2006-01-16 17:03:21 +00:00
nfs
nfs4client	Use nfs4_disconnect for connections opened with nfs4_connect.	2006-01-19 22:48:31 +00:00
nfsclient	Don't log an error on tcp connection reset, even if we don't get ECONNRESET.	2006-01-20 15:07:18 +00:00
nfsserver	- Reorder calls to vrele() after calls to vput() when the vrele is a	2006-02-01 00:25:26 +00:00
opencrypto
pc98	MFi386: revision 1.622.	2006-02-09 11:50:22 +00:00
pccard	I don't believe these are used at all, and can be safely removed	2006-01-15 06:49:28 +00:00
pci	Do not touch ifp->if_baudrate in miibus aware drivers.	2006-02-14 12:44:56 +00:00
posix4	mqueue.h has been superceded by sys/mqueue.h thanks to David Xu's work.	2005-11-28 02:58:30 +00:00
powerpc	Simplify system time accounting for profiling.	2006-02-08 08:09:17 +00:00
rpc	Fix up some cut-n-paste damage and some out-of-date comments.	2006-01-20 15:20:41 +00:00
security	Add stub AUE_EACCESS entry.	2006-02-11 23:55:08 +00:00
sparc64	For E250 and E450 enable the watchdog part of the MK48Txx as it just	2006-02-15 16:56:38 +00:00
sys	CPU time accounting speedup (step 2)	2006-02-11 09:33:07 +00:00
tools	Fix a leftover "iwi_boot" string.	2006-01-30 16:32:08 +00:00
ufs	In quotaoff(), lock the vnode instead of asserting it when manipulating	2006-02-12 13:20:06 +00:00
vm	When the VM needs to allocated physical memory pages (for non interrupt use)	2006-02-15 22:29:53 +00:00
Makefile	add nfsclient/, nfs4client/, and rpc/ directories to the	2006-01-10 20:58:27 +00:00