NFSD: simplify per-net file cache management

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We currently have a 'laundrette' for closing cached files - a different
work-item for each network-namespace.

These 'laundrettes' (aka struct nfsd_fcache_disposal) are currently on a
list, and are freed using rcu.

The list is not necessary as we have a per-namespace structure (struct
nfsd_net) which can hold a link to the nfsd_fcache_disposal.
The use of kfree_rcu is also unnecessary as the cache is cleaned of all
files associated with a given namespace, and no new files can be added,
before the nfsd_fcache_disposal is freed.

So add a '->fcache_disposal' link to nfsd_net, and discard the list
management and rcu usage.

Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

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NeilBrown 2021-12-01 10:58:14 +11:00 • committed by Chuck Lever

parent 1e37d0e5bd

commit 1463b38e7c

2 changed files with 17 additions and 61 deletions

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76

fs/nfsd/filecache.c

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2

fs/nfsd/netns.h

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