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Differential D23916

(lookup 7) vfs: add support for !LOCKLEAF to lockless lookup
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Authored by mjg on Mar 2 2020, 5:57 AM.
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rS363523: vfs: add support for !LOCKLEAF to lockless lookup
Summary

Regular lookup always locks vnodes, which means if LOCKLEAF is not specified it has to unlock.

Since fast path does not lock upfront we can just check what needs to be done. New vget variant is introduced to elide locking.

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rS FreeBSD src repository - subversion
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Event Timeline

mjg created this revision.Mar 2 2020, 5:57 AM
Herald added a subscriber: imp. · View Herald TranscriptMar 2 2020, 5:57 AM
Harbormaster completed remote builds in B29716: Diff 69052.Mar 2 2020, 5:57 AM
mjg updated this revision to Diff 69144.Mar 4 2020, 12:10 AM
  • rebase
mjg updated this revision to Diff 69206.Mar 5 2020, 7:26 AM
  • rebase
mjg updated this revision to Diff 74042.Jul 3 2020, 11:10 AM
mjg edited the summary of this revision. (Show Details)
  • rebase
mjg updated this revision to Diff 74135.Jul 6 2020, 8:03 PM
mjg retitled this revision from vfs: add support for !LOCKLEAF to fast path lookup to (lookup 7) vfs: add support for !LOCKLEAF to lockless lookup.
mjg added a reviewer: markj.
  • rebase
This revision was not accepted when it landed; it landed in state Needs Review.Jul 25 2020, 10:41 AM
Closed by commit rS363523: vfs: add support for !LOCKLEAF to lockless lookup (authored by mjg). · Explain Why
This revision was automatically updated to reflect the committed changes.
mjg added a commit: rS363523: vfs: add support for !LOCKLEAF to lockless lookup.

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head/
sys/
kern/
20 lines

Diff 74913

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head/sys/kern/vfs_cache.c

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