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Remove shrink_dcache_memory() and shrink_icache_memory()

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This functionality is optional and until Linux 3.0, which
provided per-filesystem shinkers, they was never a reasonable
interface.  Therefore, this functionality is being dropped
for earlier kernels.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #2757
This commit is contained in:
Brian Behlendorf 2014-10-03 13:00:53 -07:00
parent 60bba62814
commit 050d22b068
1 changed files with 3 additions and 19 deletions
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22
module/zfs/zpl_super.c
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@ -288,34 +288,18 @@ zpl_prune_sb(struct super_block *sb, void *arg)
error = -zfs_sb_prune(sb, *(unsigned long *)arg, &objects); error = -zfs_sb_prune(sb, *(unsigned long *)arg, &objects);
ASSERT3S(error, <=, 0); ASSERT3S(error, <=, 0);
} }
#endif /* HAVE_SHRINK */
void void
zpl_prune_sbs(int64_t bytes_to_scan, void *private) zpl_prune_sbs(int64_t bytes_to_scan, void *private)
{ {
#ifdef HAVE_SHRINK
unsigned long nr_to_scan = (bytes_to_scan / sizeof (znode_t)); unsigned long nr_to_scan = (bytes_to_scan / sizeof (znode_t));
iterate_supers_type(&zpl_fs_type, zpl_prune_sb, &nr_to_scan); iterate_supers_type(&zpl_fs_type, zpl_prune_sb, &nr_to_scan);
kmem_reap(); kmem_reap();
}
#else
/*
* Linux 2.6.x - 3.0 API
*
* These are best effort interfaces are provided by the SPL to induce
* the Linux VM subsystem to reclaim a fraction of the both dnode and
* inode caches. Ideally, we want to just target the zfs file systems
* however our only option is to reclaim from them all.
*/
void
zpl_prune_sbs(int64_t bytes_to_scan, void *private)
{
unsigned long nr_to_scan = (bytes_to_scan / sizeof (znode_t));
shrink_dcache_memory(nr_to_scan, GFP_KERNEL);
shrink_icache_memory(nr_to_scan, GFP_KERNEL);
kmem_reap();
}
#endif /* HAVE_SHRINK */ #endif /* HAVE_SHRINK */
}
#ifdef HAVE_NR_CACHED_OBJECTS #ifdef HAVE_NR_CACHED_OBJECTS
static int static int