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freebsd-dev/sys/vm
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Alan Cox 9452b5eda9 Back in the days when the kernel was single threaded, testing 
"vm_paging_target() > 0" was a reasonable way of determining if the
inactive queue scan met its target.  However, now that other threads
can be allocating pages while the inactive queue scan is running, it's
an unreliable method.  The effect of it being unreliable is that we
can start swapping out processes when we didn't intend to.

This issue has existed since the kernel was multithreaded, but the
changes to the inactive queue target in 10.0-RELEASE have made its
effects visible.

This change introduces a more direct method for determining if the
inactive queue scan met its target that is not affected by the actions
of other threads.

Reported by:	Steve Polyack
Tested by:	pho, Steve Polyack (an earlier version)
MFC after:	1 week
Sponsored by:	EMC / Isilon Storage Division
2014-08-26 16:40:20 +00:00
..
_vm_radix.h On all the architectures, avoid to preallocate the physical memory 2013-08-09 11:28:55 +00:00
default_pager.c Switch the vm_object mutex to be a rwlock. This will enable in the 2013-03-09 02:32:23 +00:00
device_pager.c Initialize paddr to handle the case of zero size. 2014-03-12 16:38:55 +00:00
memguard.c Pull in r267961 and r267973 again. Fix for issues reported will follow. 2014-06-28 03:56:17 +00:00
memguard.h Replace kernel virtual address space allocation with vmem. This provides 2013-08-07 06:21:20 +00:00
phys_pager.c The soft and hard busy mechanism rely on the vm object lock to work. 2013-08-09 11:11:11 +00:00
pmap.h Change pmap_enter(9) interface to take flags parameter and superpage 2014-08-08 17:12:03 +00:00
redzone.c Pull in r267961 and r267973 again. Fix for issues reported will follow. 2014-06-28 03:56:17 +00:00
redzone.h
sg_pager.c Different consumers of the struct vm_page abuse pageq member to keep 2013-08-10 17:36:42 +00:00
swap_pager.c Add sysctl OIDs showing the actual size and capacity of the swap zone. 2014-04-26 12:18:17 +00:00
swap_pager.h Do not map the swap i/o pbufs if the geom provider for the swap 2013-03-19 14:39:27 +00:00
uma_core.c Pull in r267961 and r267973 again. Fix for issues reported will follow. 2014-06-28 03:56:17 +00:00
uma_dbg.c - Add a per-zone lock for zones without kegs. 2013-06-20 19:08:12 +00:00
uma_dbg.h
uma_int.h Implement soft pressure on UMA cache bucket sizes. 2013-11-19 10:05:53 +00:00
uma.h Create two public UMA_ZONE_PCPU zones: 64 bit sized and pointer sized. 2014-02-10 19:59:46 +00:00
vm_extern.h Handle wiring failures in vm_map_wire() with the new functions 2014-08-02 16:10:24 +00:00
vm_fault.c Relax one of the conditions for mapping a page on the fast path. 2014-08-23 05:24:31 +00:00
vm_glue.c If vm_page_grab() allocates a new page, the page is not inserted into 2014-08-13 05:44:08 +00:00
vm_init.c Pull in r267961 and r267973 again. Fix for issues reported will follow. 2014-06-28 03:56:17 +00:00
vm_kern.c Change pmap_enter(9) interface to take flags parameter and superpage 2014-08-08 17:12:03 +00:00
vm_kern.h - Add a statically allocated memguard arena since it is needed very early 2013-08-13 22:40:43 +00:00
vm_map.c Rewrite a loop in vm_map_wire() so that gcc doesn't think that the variable 2014-08-02 17:58:20 +00:00
vm_map.h Add MAP_EXCL flag for mmap(2). It should be combined with MAP_FIXED, 2014-06-19 05:00:39 +00:00
vm_meter.c Rename global cnt to vm_cnt to avoid shadowing. 2014-03-22 10:26:09 +00:00
vm_mmap.c Remove ia64. 2014-07-07 00:27:09 +00:00
vm_object.c When unwiring a region of an address space, do not assume that the 2014-07-26 18:10:18 +00:00
vm_object.h Add wrappers to assert that vm object is unlocked and for try upgrade. 2014-08-06 19:30:35 +00:00
vm_page.c Adapt vm_page_aflag_set(PGA_WRITEABLE) to the locking of 2014-08-09 05:00:34 +00:00
vm_page.h Adapt vm_page_aflag_set(PGA_WRITEABLE) to the locking of 2014-08-09 05:00:34 +00:00
vm_pageout.c Back in the days when the kernel was single threaded, testing 2014-08-26 16:40:20 +00:00
vm_pageout.h Move what remains of vm/vm_contig.c into vm/vm_pageout.c, where similar 2012-07-18 05:21:34 +00:00
vm_pager.c - Add a general purpose resource allocator, vmem, from NetBSD. It was 2013-06-28 03:51:20 +00:00
vm_pager.h The vm_pager_page_unswapped() pager op is only implemented for the 2014-08-06 19:34:03 +00:00
vm_param.h Rename global cnt to vm_cnt to avoid shadowing. 2014-03-22 10:26:09 +00:00
vm_phys.c vm_phys: improve robustness of fictitious ranges 2014-08-05 10:29:01 +00:00
vm_phys.h Rename global cnt to vm_cnt to avoid shadowing. 2014-03-22 10:26:09 +00:00
vm_radix.c Pull in r267961 and r267973 again. Fix for issues reported will follow. 2014-06-28 03:56:17 +00:00
vm_radix.h Eliminate a redundant parameter to vm_radix_replace(). 2013-12-08 20:07:02 +00:00
vm_reserv.c Correct a bug in the management of the population map on big-endian 2014-06-11 16:11:12 +00:00
vm_reserv.h Refactor vm_page_alloc()'s interactions with vm_reserv_alloc_page() and 2013-05-12 16:50:18 +00:00
vm_unix.c Remove ia64. 2014-07-07 00:27:09 +00:00
vm_zeroidle.c Pull in r267961 and r267973 again. Fix for issues reported will follow. 2014-06-28 03:56:17 +00:00
vm.h rename scheduler->swapper and SI_SUB_RUN_SCHEDULER->SI_SUB_LAST 2013-07-24 09:45:31 +00:00
vnode_pager.c Rename global cnt to vm_cnt to avoid shadowing. 2014-03-22 10:26:09 +00:00
vnode_pager.h Account the writeable shared mappings backed by file in the vnode 2012-02-23 21:07:16 +00:00