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authorKonstantin Belousov <kib@FreeBSD.org>2019-08-16 09:43:49 +0000
committerKonstantin Belousov <kib@FreeBSD.org>2019-08-16 09:43:49 +0000
commit245139c69d15c639b9e518349786ae46c3188f01 (patch)
treeb47b5b3af8d16c265572fc651d84cb55bd36b647 /cddl
parent3a79e8e7721fbc40b8c63cf4473d92793be73a1a (diff)
downloadsrc-245139c69d15c639b9e518349786ae46c3188f01.tar.gz
src-245139c69d15c639b9e518349786ae46c3188f01.zip
Fix OOM handling of some corner cases.
In addition to pagedaemon initiating OOM, also do it from the vm_fault() internals. Namely, if the thread waits for a free page to satisfy page fault some preconfigured amount of time, trigger OOM. These triggers are rate-limited, due to a usual case of several threads of the same multi-threaded process to enter fault handler simultaneously. The faults from pagedaemon threads participate in the calculation of OOM rate, but are not under the limit. Reviewed by: markj (previous version) Tested by: pho Discussed with: alc Sponsored by: The FreeBSD Foundation MFC after: 2 weeks Differential revision: https://reviews.freebsd.org/D13671
Notes
Notes: svn path=/head/; revision=351114
Diffstat (limited to 'cddl')
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