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freebsd-dev/sys/vm
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Mark Johnston e4bdb6857a vm_page: Handle VM_ALLOC_NORECLAIM in the contiguous page allocator 
We added _NORECLAIM to request that kmem_alloc_contig_pages() not spend
time scanning physical memory for candidates to reclaim.  In some
situations the scanning can induce large amounts of undesirable latency,
and it's less important that the request be satisfied than it is that we
not spend many milliseconds scanning.

The problem extends to vm_reserv_reclaim_contig(), which unlike
vm_reserv_reclaim() may have to scan the entire list of partially
populated reservations.  Use VM_ALLOC_NORECLAIM to request that this
scan not be executed.[1]

As a side effect, this fixes a regression in 02fb0585e7 ("vm_page:
Drop handling of VM_ALLOC_NOOBJ in vm_page_alloc_contig_domain()")
where VM_ALLOC_CONTIG was not included in VPAC_FLAGS or VPANC_FLAGS even
though it is not masked by kmem_alloc_contig_pages().[2]

Reported by:	gallatin [1], glebius [2]
Reviewed by:	alc, glebius, kib
MFC after:	2 weeks
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D32899
2021-11-11 14:26:41 -05:00
..
_vm_phys.h vm_phys: Try to clean up NUMA KPIs 2020-11-19 03:59:21 +00:00
_vm_radix.h
default_pager.c vm_object_kvme_type(): reimplement by embedding kvme_type into pagerops 2021-05-13 20:10:35 +03:00
device_pager.c vm_object_kvme_type(): reimplement by embedding kvme_type into pagerops 2021-05-13 20:10:35 +03:00
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 vm_object_kvme_type(): reimplement by embedding kvme_type into pagerops 2021-05-13 20:10:35 +03:00
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 redzone: Raise a compile error if KASAN is configured 2021-07-23 10:47:13 -04:00
redzone.h
sg_pager.c vm_object_kvme_type(): reimplement by embedding kvme_type into pagerops 2021-05-13 20:10:35 +03:00
swap_pager.c Externalize nsw_cluster_max and initialize it early. 2021-09-28 11:23:52 -07:00
swap_pager.h forward declare struct thread 2021-10-11 12:59:39 -06:00
uma_core.c uma: Fix handling of reserves in zone_import() 2021-11-01 09:51:43 -04:00
uma_dbg.c
uma_dbg.h
uma_int.h Improve UMA cache reclamation. 2021-05-02 19:45:23 -04:00
uma.h Remove some remaining references to VM_ALLOC_NOOBJ 2021-10-19 21:22:56 -04:00
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_dumpset.h Avoid dump_avail[] redefinition. 2020-10-14 22:51:40 +00:00
vm_extern.h Add vnode_pager_purge_range(9) KPI 2021-08-05 22:52:26 +08:00
vm_fault.c vm_fault: Stop specifying VM_ALLOC_ZERO 2021-10-19 21:22:56 -04:00
vm_glue.c Fix a common typo in syctl descriptions 2021-11-03 20:49:24 +01:00
vm_init.c Make MAXPHYS tunable. Bump MAXPHYS to 1M. 2020-11-28 12:12:51 +00:00
vm_kern.c vm_page: Handle VM_ALLOC_NORECLAIM in the contiguous page allocator 2021-11-11 14:26:41 -05:00
vm_kern.h Remove the VM map zone. 2020-08-17 13:02:01 +00:00
vm_map.c setrlimit: Take stack gap into account. 2021-10-15 10:21:47 +02:00
vm_map.h setrlimit: Take stack gap into account. 2021-10-15 10:21:47 +02:00
vm_meter.c Use atomic loads/stores when updating td->td_state 2021-02-18 14:02:48 +00:00
vm_mmap.c Add OBJT_SWAP_TMPFS pager 2021-05-07 17:08:03 +03:00
vm_object.c sysctl vm.objects: yield if hog 2021-10-25 20:34:02 +03:00
vm_object.h vm: add another pager private flag 2021-05-15 20:47:29 +00:00
vm_page.c vm_page: Handle VM_ALLOC_NORECLAIM in the contiguous page allocator 2021-11-11 14:26:41 -05:00
vm_page.h Remove some remaining references to VM_ALLOC_NOOBJ 2021-10-19 21:22:56 -04:00
vm_pageout.c Fix a few typos in source code comments 2021-08-14 09:06:09 +02:00
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 vm_phys: Try to clean up NUMA KPIs 2020-11-19 03:59:21 +00:00
vm_pager.c amd64: Populate the KMSAN shadow maps and integrate with the VM 2021-08-10 21:27:53 -04:00
vm_pager.h vm: Add KPI to dynamically register pagers 2021-05-13 20:12:29 +03:00
vm_param.h (fault 3/9) Move map relookup into a dedicated function. 2020-01-23 05:07:01 +00:00
vm_phys.c minidump: De-duplicate is_dumpable() 2021-09-29 16:41:52 -03:00
vm_phys.h minidump: De-duplicate is_dumpable() 2021-09-29 16:41:52 -03:00
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 vm_reserv: Fix list locking in vm_reserv_reclaim_contig() 2021-03-11 10:35:35 -05:00
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 Make vmdaemon timeout configurable 2021-10-17 13:49:29 +01:00
vm_unix.c Prepare to handle non-trivial errors from vm_map_delete(). 2020-09-09 21:34:31 +00:00
vm.h tmpfs: dynamically register tmpfs pager 2021-05-13 20:13:34 +03:00
vnode_pager.c Add vnode_pager_purge_range(9) KPI 2021-08-05 22:52:26 +08:00
vnode_pager.h vm pager: writemapping accounting for OBJT_SWAP 2019-09-03 20:31:48 +00:00