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authorPavel Tatashin <pasha.tatashin@oracle.com>2017-07-06 15:39:11 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2017-07-06 16:24:33 -0700
commit3d375d78593cd5daeead34ed3279c4ff63dd04f2 (patch)
tree7c18820dd87b42ca28cb808245ef72d17671c6a3 /fs/dcache.c
parent3749a8f008eac3355a9e50b366ba08317a7e9cf8 (diff)
downloadop-kernel-dev-3d375d78593cd5daeead34ed3279c4ff63dd04f2.zip
op-kernel-dev-3d375d78593cd5daeead34ed3279c4ff63dd04f2.tar.gz
mm: update callers to use HASH_ZERO flag
Update dcache, inode, pid, mountpoint, and mount hash tables to use HASH_ZERO, and remove initialization after allocations. In case of places where HASH_EARLY was used such as in __pv_init_lock_hash the zeroed hash table was already assumed, because memblock zeroes the memory. CPU: SPARC M6, Memory: 7T Before fix: Dentry cache hash table entries: 1073741824 Inode-cache hash table entries: 536870912 Mount-cache hash table entries: 16777216 Mountpoint-cache hash table entries: 16777216 ftrace: allocating 20414 entries in 40 pages Total time: 11.798s After fix: Dentry cache hash table entries: 1073741824 Inode-cache hash table entries: 536870912 Mount-cache hash table entries: 16777216 Mountpoint-cache hash table entries: 16777216 ftrace: allocating 20414 entries in 40 pages Total time: 3.198s CPU: Intel Xeon E5-2630, Memory: 2.2T: Before fix: Dentry cache hash table entries: 536870912 Inode-cache hash table entries: 268435456 Mount-cache hash table entries: 8388608 Mountpoint-cache hash table entries: 8388608 CPU: Physical Processor ID: 0 Total time: 3.245s After fix: Dentry cache hash table entries: 536870912 Inode-cache hash table entries: 268435456 Mount-cache hash table entries: 8388608 Mountpoint-cache hash table entries: 8388608 CPU: Physical Processor ID: 0 Total time: 3.244s Link: http://lkml.kernel.org/r/1488432825-92126-4-git-send-email-pasha.tatashin@oracle.com Signed-off-by: Pavel Tatashin <pasha.tatashin@oracle.com> Reviewed-by: Babu Moger <babu.moger@oracle.com> Cc: David Miller <davem@davemloft.net> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/dcache.c')
-rw-r--r--fs/dcache.c18
1 files changed, 4 insertions, 14 deletions
diff --git a/fs/dcache.c b/fs/dcache.c
index a9f995f..a140fe1 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -3546,8 +3546,6 @@ __setup("dhash_entries=", set_dhash_entries);
static void __init dcache_init_early(void)
{
- unsigned int loop;
-
/* If hashes are distributed across NUMA nodes, defer
* hash allocation until vmalloc space is available.
*/
@@ -3559,24 +3557,19 @@ static void __init dcache_init_early(void)
sizeof(struct hlist_bl_head),
dhash_entries,
13,
- HASH_EARLY,
+ HASH_EARLY | HASH_ZERO,
&d_hash_shift,
&d_hash_mask,
0,
0);
-
- for (loop = 0; loop < (1U << d_hash_shift); loop++)
- INIT_HLIST_BL_HEAD(dentry_hashtable + loop);
}
static void __init dcache_init(void)
{
- unsigned int loop;
-
- /*
+ /*
* A constructor could be added for stable state like the lists,
* but it is probably not worth it because of the cache nature
- * of the dcache.
+ * of the dcache.
*/
dentry_cache = KMEM_CACHE(dentry,
SLAB_RECLAIM_ACCOUNT|SLAB_PANIC|SLAB_MEM_SPREAD|SLAB_ACCOUNT);
@@ -3590,14 +3583,11 @@ static void __init dcache_init(void)
sizeof(struct hlist_bl_head),
dhash_entries,
13,
- 0,
+ HASH_ZERO,
&d_hash_shift,
&d_hash_mask,
0,
0);
-
- for (loop = 0; loop < (1U << d_hash_shift); loop++)
- INIT_HLIST_BL_HEAD(dentry_hashtable + loop);
}
/* SLAB cache for __getname() consumers */
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