NFS: Correct timing for assigning access cache timestamp

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[ Upstream commit 21fd9e8700 ]

When the user's login time is newer than the cache's timestamp,
the original entry in the RB-tree will be replaced by a new entry.
Currently, the timestamp is only set if the entry is not found in
the RB-tree, which can cause the timestamp to be undefined when
the entry exists. This may result in a significant increase in
ACCESS operations if the timestamp is set to zero.

Signed-off-by: Chengen Du <chengen.du@canonical.com>
Fixes: 0eb43812c0 ("NFS: Clear the file access cache upon login”)
Reviewed-by: Benjamin Coddington <bcodding@redhat.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Chengen Du 2023-03-08 16:03:27 +08:00 • committed by Greg Kroah-Hartman

parent 89ab36bb8b

commit 90f2b0b417

1 changed files with 1 additions and 1 deletions

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fs/nfs/dir.c

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