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Linux 3.12 compat: split shrinker has s_shrink

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The split count/scan shrinker callbacks introduced in 3.12 broke the
test for HAVE_SHRINK, effectively disabling the per-superblock shrinkers.

This patch re-enables the per-superblock shrinkers when the split shrinker
callbacks have been detected.

Signed-off-by: Tim Chase <tim@chase2k.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #2975
This commit is contained in:
Tim Chase
2014-12-18 10:08:47 -06:00
committed by Brian Behlendorf
parent 6e9710f7c3
commit 3c832b8cc1
2 changed files with 10 additions and 6 deletions
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module/zfs/zpl_super.c
+4 -4
View File
@@ -268,7 +268,7 @@ zpl_kill_sb(struct super_block *sb)
#endif /* HAVE_S_INSTANCES_LIST_HEAD */
}
#ifdef HAVE_SHRINK
#if defined(HAVE_SHRINK) || defined(HAVE_SPLIT_SHRINKER_CALLBACK)
/*
* Linux 3.1 - 3.x API
*
@@ -288,17 +288,17 @@ zpl_prune_sb(struct super_block *sb, void *arg)
error = -zfs_sb_prune(sb, *(unsigned long *)arg, &objects);
ASSERT3S(error, <=, 0);
}
#endif /* HAVE_SHRINK */
#endif /* defined(HAVE_SHRINK) || defined(HAVE_SPLIT_SHRINKER_CALLBACK) */
void
zpl_prune_sbs(int64_t bytes_to_scan, void *private)
{
#ifdef HAVE_SHRINK
#if defined(HAVE_SHRINK) || defined(HAVE_SPLIT_SHRINKER_CALLBACK)
unsigned long nr_to_scan = (bytes_to_scan / sizeof (znode_t));
iterate_supers_type(&zpl_fs_type, zpl_prune_sb, &nr_to_scan);
kmem_reap();
#endif /* HAVE_SHRINK */
#endif /* defined(HAVE_SHRINK) || defined(HAVE_SPLIT_SHRINKER_CALLBACK) */
}
#ifdef HAVE_NR_CACHED_OBJECTS