uma: provide KPI to drain SMR zones more aggressively
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Authored by glebius on Jan 12 2022, 3:21 PM.

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imp

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Reviewers

markj
jeff

Summary

New drain request UMA_RECLAIM_DRAIN_ALL acts as UMA_RECLAIM_DRAIN_CPU,
but would also drain pcpu free buckets for SMR zones. It won't
shrink cache sizes, though.

The KPI could be used at vnet jail destruction event, to purge the
inpcbs sitting in SMR caches that prevent jail from being freed.

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Repository

rS FreeBSD src repository - subversion

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No Test Coverage

Build Status

Buildable 43889
Build 40777: arc lint + arc unit

Event Timeline

glebius created this revision.Jan 12 2022, 3:21 PM

Herald added a subscriber: imp. · View Herald TranscriptJan 12 2022, 3:21 PM

glebius requested review of this revision.Jan 12 2022, 3:21 PM

Harbormaster completed remote builds in B43889: Diff 101371.Jan 12 2022, 3:21 PM

glebius added a parent revision: D33867: uma: don't call cache_shrink() from pcpu_cache_drain_safe().Jan 12 2022, 3:21 PM

glebius added a child revision: D33869: uma: add sysctl to reclaim caches from a single zone.

Revision Contents
Changeset List

Path

Size

sys/

vm/

uma.h

1 line

uma_core.c

29 lines

Diff 101371

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sys/vm/uma.h