vm_grab: reset iter after alloc failure
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Authored by dougm on Apr 10 2025, 6:48 AM.

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rG14efeab6adba: vm_grab: reset iter after alloc failure

Summary

After vm_page_grab_lookup fails to find a page, and vm_page_alloc_after fails to allocate one, reset the pages iterator which is invalidated by a release/acquire of the object write lock within the allocation code.

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rG FreeBSD src repository

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Event Timeline

dougm requested review of this revision.Apr 10 2025, 6:48 AM

dougm created this revision.

kib accepted this revision.Apr 10 2025, 6:50 AM

This revision is now accepted and ready to land.Apr 10 2025, 6:50 AM

Fixes: 7becd87c988c ("vm_grab: use iterator for grab lookup")

Closed by commit rG14efeab6adba: vm_grab: reset iter after alloc failure (authored by dougm). · Explain WhyApr 10 2025, 7:10 AM

This revision was automatically updated to reflect the committed changes.

dougm added a commit: rG14efeab6adba: vm_grab: reset iter after alloc failure.

Herald added a subscriber: imp. · View Herald TranscriptApr 10 2025, 7:10 AM

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sys/

vm/

vm_page.c

2 lines

Diff 153438

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vm_grab: reset iter after alloc failureClosedPublicActions