freebsd-skq/sys/vm
markj 0742d18e6c vm_pageout: Avoid rounding down the inactive scan target
With helper page daemon threads, enabled by default in r364786, we
divide the inactive target by the number of threads, rounding down, and
sum the total number of pages freed by the threads.  This sum is
compared with the original target, but by rounding down we might lose
pages, causing the page daemon control loop to conclude that inactive
queue scanning isn't keeping up with demand for free pages.  Typically
this results in excessive swapping.

Fix the problem by accounting for the error in the main pagedaemon
thread's target.  Note that by default the problem will manifest only in
systems with >16 CPUs in a NUMA domain.

Reviewed by:	cem
Discussed with:	dougm
Reported and tested by:	dhw, glebius
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D26610
2020-10-02 19:16:06 +00:00
..
_vm_radix.h
default_pager.c vm: clean up empty lines in .c and .h files 2020-09-01 21:20:45 +00:00
device_pager.c Don't hold the object lock while calling getpages. 2020-01-19 23:47:32 +00:00
memguard.c vm: clean up empty lines in .c and .h files 2020-09-01 21:20:45 +00:00
memguard.h LinuxKPI: Implement ksize() function. 2020-08-29 19:26:31 +00:00
phys_pager.c Allow consumer to customize physical pager. 2020-09-09 00:00:43 +00:00
pmap.h Add pmap_enter(9) PMAP_ENTER_LARGEPAGE flag and implement it on amd64. 2020-09-09 21:50:24 +00:00
redzone.c vm: clean up empty lines in .c and .h files 2020-09-01 21:20:45 +00:00
redzone.h
sg_pager.c vm: clean up empty lines in .c and .h files 2020-09-01 21:20:45 +00:00
swap_pager.c vm: clean up empty lines in .c and .h files 2020-09-01 21:20:45 +00:00
swap_pager.h Remove swblk_t. 2020-02-17 15:11:07 +00:00
uma_core.c uma: Use the bucket cache for cross-domain allocations 2020-10-02 19:04:29 +00:00
uma_dbg.c Fix compilation failures on different arches that have vm_machdep.c not 2019-01-15 19:33:47 +00:00
uma_dbg.h
uma_int.h vm: clean up empty lines in .c and .h files 2020-09-01 21:20:45 +00:00
uma.h vm: clean up empty lines in .c and .h files 2020-09-01 21:20:45 +00:00
vm_domainset.c Add interruptible variant of vm_wait(9), vm_wait_intr(9). 2020-09-08 23:28:09 +00:00
vm_domainset.h Add interruptible variant of vm_wait(9), vm_wait_intr(9). 2020-09-08 23:28:09 +00:00
vm_extern.h Remove the VM map zone. 2020-08-17 13:02:01 +00:00
vm_fault.c Implement sparse core dumps 2020-10-02 17:50:22 +00:00
vm_glue.c Add interruptible variant of vm_wait(9), vm_wait_intr(9). 2020-09-08 23:28:09 +00:00
vm_init.c Remove the VM map zone. 2020-08-17 13:02:01 +00:00
vm_kern.c Use a large kmem arena import size on NUMA systems. 2020-08-26 14:31:48 +00:00
vm_kern.h Remove the VM map zone. 2020-08-17 13:02:01 +00:00
vm_map.c vm_map: Add a map entry kind that can only be clipped at specific boundary. 2020-09-09 22:02:30 +00:00
vm_map.h Implement sparse core dumps 2020-10-02 17:50:22 +00:00
vm_meter.c vm: clean up empty lines in .c and .h files 2020-09-01 21:20:45 +00:00
vm_mmap.c Support for userspace non-transparent superpages (largepages). 2020-09-09 22:12:51 +00:00
vm_object.c Allow consumer to customize physical pager. 2020-09-09 00:00:43 +00:00
vm_object.h Allow consumer to customize physical pager. 2020-09-09 00:00:43 +00:00
vm_page.c Sparsify the vm_page_dump bitmap 2020-09-21 22:21:59 +00:00
vm_page.h Sparsify the vm_page_dump bitmap 2020-09-21 22:21:59 +00:00
vm_pageout.c vm_pageout: Avoid rounding down the inactive scan target 2020-10-02 19:16:06 +00:00
vm_pageout.h Add interruptible variant of vm_wait(9), vm_wait_intr(9). 2020-09-08 23:28:09 +00:00
vm_pagequeue.h Add support for multithreading the inactive queue pageout within a domain. 2020-08-11 20:37:45 +00:00
vm_pager.c sys/vm: quiet -Wwrite-strings 2020-02-23 03:32:04 +00:00
vm_pager.h Allow consumer to customize physical pager. 2020-09-09 00:00:43 +00:00
vm_param.h (fault 3/9) Move map relookup into a dedicated function. 2020-01-23 05:07:01 +00:00
vm_phys.c Flag vm_reserv and vm_phys sysctls as MPSAFE. 2020-09-23 19:36:07 +00:00
vm_phys.h arm64/pmap: Sparsify pv_table 2020-09-21 22:23:57 +00:00
vm_radix.c vm: clean up empty lines in .c and .h files 2020-09-01 21:20:45 +00:00
vm_radix.h Use SMR to provide a safe unlocked lookup for vm_radix. 2020-02-19 19:58:31 +00:00
vm_reserv.c Flag vm_reserv and vm_phys sysctls as MPSAFE. 2020-09-23 19:36:07 +00:00
vm_reserv.h Fix locking in vm_reserv_reclaim_contig(). 2019-11-22 16:28:52 +00:00
vm_swapout_dummy.c
vm_swapout.c Use a single VM object for kernel stacks. 2020-04-26 20:08:57 +00:00
vm_unix.c Prepare to handle non-trivial errors from vm_map_delete(). 2020-09-09 21:34:31 +00:00
vm.h vm: clean up empty lines in .c and .h files 2020-09-01 21:20:45 +00:00
vnode_pager.c vm_ooffset_t is now unsigned 2020-09-18 16:48:08 +00:00
vnode_pager.h vm pager: writemapping accounting for OBJT_SWAP 2019-09-03 20:31:48 +00:00