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| author | Chuck Lever <chuck.lever@oracle.com> | 2022-07-08 21:25:24 +0300 |
|---|---|---|
| committer | Chuck Lever <chuck.lever@oracle.com> | 2022-07-30 03:11:19 +0300 |
| commit | edead3a55804739b2e4af0f35e9c7326264e7b22 (patch) | |
| tree | c2d97040a94dcb96f0fed87b0bd62c9213baa576 /fs/nfsd/filecache.c | |
| parent | 4a0e73e635e3f36b616ad5c943e3d23debe4632f (diff) | |
| download | linux-edead3a55804739b2e4af0f35e9c7326264e7b22.tar.xz | |
NFSD: Fix the filecache LRU shrinker
Without LRU item rotation, the shrinker visits only a few items on
the end of the LRU list, and those would always be long-term OPEN
files for NFSv4 workloads. That makes the filecache shrinker
completely ineffective.
Adopt the same strategy as the inode LRU by using LRU_ROTATE.
Suggested-by: Dave Chinner <david@fromorbit.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Diffstat (limited to 'fs/nfsd/filecache.c')
| -rw-r--r-- | fs/nfsd/filecache.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/nfsd/filecache.c b/fs/nfsd/filecache.c index 69d1ab6cfc14..380f6c0da465 100644 --- a/fs/nfsd/filecache.c +++ b/fs/nfsd/filecache.c @@ -446,6 +446,7 @@ nfsd_file_dispose_list_delayed(struct list_head *dispose) * * Return values: * %LRU_REMOVED: @item was removed from the LRU + * %LRU_ROTATE: @item is to be moved to the LRU tail * %LRU_SKIP: @item cannot be evicted */ static enum lru_status @@ -484,7 +485,7 @@ nfsd_file_lru_cb(struct list_head *item, struct list_lru_one *lru, if (test_and_clear_bit(NFSD_FILE_REFERENCED, &nf->nf_flags)) { trace_nfsd_file_gc_referenced(nf); - return LRU_SKIP; + return LRU_ROTATE; } if (!test_and_clear_bit(NFSD_FILE_HASHED, &nf->nf_flags)) { @@ -526,7 +527,7 @@ nfsd_file_gc(void) unsigned long ret; ret = list_lru_walk(&nfsd_file_lru, nfsd_file_lru_cb, - &dispose, LONG_MAX); + &dispose, list_lru_count(&nfsd_file_lru)); trace_nfsd_file_gc_removed(ret, list_lru_count(&nfsd_file_lru)); nfsd_file_gc_dispose_list(&dispose); } |