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author | Linus Torvalds <torvalds@linux-foundation.org> | 2013-09-13 00:01:38 +0200 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-09-13 00:01:38 +0200 |
commit | 26935fb06ee88f1188789807687c03041f3c70d9 (patch) | |
tree | 381c487716540b52348d78bee6555f8fa61d77ef /fs/nfsd | |
parent | Merge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/... (diff) | |
parent | Merge branch 'for-next' into for-linus (diff) | |
download | linux-26935fb06ee88f1188789807687c03041f3c70d9.tar.xz linux-26935fb06ee88f1188789807687c03041f3c70d9.zip |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs pile 4 from Al Viro:
"list_lru pile, mostly"
This came out of Andrew's pile, Al ended up doing the merge work so that
Andrew didn't have to.
Additionally, a few fixes.
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (42 commits)
super: fix for destroy lrus
list_lru: dynamically adjust node arrays
shrinker: Kill old ->shrink API.
shrinker: convert remaining shrinkers to count/scan API
staging/lustre/libcfs: cleanup linux-mem.h
staging/lustre/ptlrpc: convert to new shrinker API
staging/lustre/obdclass: convert lu_object shrinker to count/scan API
staging/lustre/ldlm: convert to shrinkers to count/scan API
hugepage: convert huge zero page shrinker to new shrinker API
i915: bail out earlier when shrinker cannot acquire mutex
drivers: convert shrinkers to new count/scan API
fs: convert fs shrinkers to new scan/count API
xfs: fix dquot isolation hang
xfs-convert-dquot-cache-lru-to-list_lru-fix
xfs: convert dquot cache lru to list_lru
xfs: rework buffer dispose list tracking
xfs-convert-buftarg-lru-to-generic-code-fix
xfs: convert buftarg LRU to generic code
fs: convert inode and dentry shrinking to be node aware
vmscan: per-node deferred work
...
Diffstat (limited to 'fs/nfsd')
-rw-r--r-- | fs/nfsd/nfscache.c | 32 |
1 files changed, 23 insertions, 9 deletions
diff --git a/fs/nfsd/nfscache.c b/fs/nfsd/nfscache.c index e76244edd748..9186c7ce0b14 100644 --- a/fs/nfsd/nfscache.c +++ b/fs/nfsd/nfscache.c @@ -59,11 +59,14 @@ static unsigned int longest_chain_cachesize; static int nfsd_cache_append(struct svc_rqst *rqstp, struct kvec *vec); static void cache_cleaner_func(struct work_struct *unused); -static int nfsd_reply_cache_shrink(struct shrinker *shrink, - struct shrink_control *sc); +static unsigned long nfsd_reply_cache_count(struct shrinker *shrink, + struct shrink_control *sc); +static unsigned long nfsd_reply_cache_scan(struct shrinker *shrink, + struct shrink_control *sc); static struct shrinker nfsd_reply_cache_shrinker = { - .shrink = nfsd_reply_cache_shrink, + .scan_objects = nfsd_reply_cache_scan, + .count_objects = nfsd_reply_cache_count, .seeks = 1, }; @@ -232,16 +235,18 @@ nfsd_cache_entry_expired(struct svc_cacherep *rp) * Walk the LRU list and prune off entries that are older than RC_EXPIRE. * Also prune the oldest ones when the total exceeds the max number of entries. */ -static void +static long prune_cache_entries(void) { struct svc_cacherep *rp, *tmp; + long freed = 0; list_for_each_entry_safe(rp, tmp, &lru_head, c_lru) { if (!nfsd_cache_entry_expired(rp) && num_drc_entries <= max_drc_entries) break; nfsd_reply_cache_free_locked(rp); + freed++; } /* @@ -254,6 +259,7 @@ prune_cache_entries(void) cancel_delayed_work(&cache_cleaner); else mod_delayed_work(system_wq, &cache_cleaner, RC_EXPIRE); + return freed; } static void @@ -264,20 +270,28 @@ cache_cleaner_func(struct work_struct *unused) spin_unlock(&cache_lock); } -static int -nfsd_reply_cache_shrink(struct shrinker *shrink, struct shrink_control *sc) +static unsigned long +nfsd_reply_cache_count(struct shrinker *shrink, struct shrink_control *sc) { - unsigned int num; + unsigned long num; spin_lock(&cache_lock); - if (sc->nr_to_scan) - prune_cache_entries(); num = num_drc_entries; spin_unlock(&cache_lock); return num; } +static unsigned long +nfsd_reply_cache_scan(struct shrinker *shrink, struct shrink_control *sc) +{ + unsigned long freed; + + spin_lock(&cache_lock); + freed = prune_cache_entries(); + spin_unlock(&cache_lock); + return freed; +} /* * Walk an xdr_buf and get a CRC for at most the first RC_CSUMLEN bytes */ |