NFS: use a hash table for delegation lookup

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nfs_delegation_find_inode currently has to walk the entire list of
delegations per inode, which can become pretty large, and can become even
larger when increasing the delegation watermark.

Add a hash table to speed up the delegation lookup, sized as a fraction
of the delegation watermark.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20250718081509.2607553-6-hch@lst.de
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>

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This commit is contained in:

Christoph Hellwig 2025-07-18 10:14:50 +02:00 • committed by Trond Myklebust

parent 2fb4af5ea3

commit f5b3108e6a

5 changed files with 58 additions and 2 deletions

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28

fs/nfs/delegation.c

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3

fs/nfs/delegation.h

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5

fs/nfs/nfs4client.c

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22

fs/nfs/nfs4proc.c

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2

include/linux/nfs_fs_sb.h

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