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nfsd: note inadequate stats locking 

After 89a26b3d29 "nfsd: split DRC global spinlock into per-bucket
locks", there is no longer a single global spinlock to protect these
stats.

So, really we need to fix that.  For now, at least fix the comment.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
J. Bruce Fields 2019-05-17 16:22:18 -04:00
parent 3ba75830ce
commit 22a46eb440
1 changed files with 5 additions and 2 deletions
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7
fs/nfsd/netns.h
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@ -142,8 +142,11 @@ struct nfsd_net {
unsigned int drc_hashsize;
/*
* Stats and other tracking of on the duplicate reply cache. All of these and
* the "rc" fields in nfsdstats are protected by the cache_lock
* Stats and other tracking of on the duplicate reply cache.
* These fields and the "rc" fields in nfsdstats are modified
* with only the per-bucket cache lock, which isn't really safe
* and should be fixed if we want the statistics to be
* completely accurate.
*/
/* total number of entries */