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vm_page_alloc.9: Document VM_ALLOC_NORECLAIM

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MFC after:	2 weeks
Sponsored by:	The FreeBSD Foundation
This commit is contained in:
Mark Johnston 2021-11-11 14:36:30 -05:00
parent e4bdb6857a
commit 811d05449b
1 changed files with 11 additions and 1 deletions
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12
share/man/man9/vm_page_alloc.9
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@ -30,7 +30,7 @@
.\"
.\" $FreeBSD$
.\"
.Dd October 17, 2021
.Dd November 11, 2021
.Dt VM_PAGE_ALLOC 9
.Os
.Sh NAME
@ -315,6 +315,16 @@ If this flag is specified, the
.Dq noobj
variants will return zeroed pages.
The other allocator interfaces ignore this flag.
.It Dv VM_ALLOC_NORECLAIM
If this flag is specified and the request can not be immediately satisfied,
the allocator will not attempt to break superpage reservations to satisfy the
allocation.
This may be useful when the overhead of scanning the reservation queue
outweighs the cost of a failed allocation.
This flag may be used only with the
.Dq contig
variants, and must not be specified in combination with
.Dv VM_ALLOC_WAITOK .
.It Dv VM_ALLOC_COUNT(n)
Hint that at least
.Fa n