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f2fs: use kmem_cache pool during inline xattr lookups

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It's been observed that kzalloc() on lookup_all_xattrs() are called millions
of times on Android, quickly becoming the top abuser of slub memory allocator.

Use a dedicated kmem cache pool for xattr lookups to mitigate this.

Signed-off-by: Park Ju Hyung <qkrwngud825@gmail.com>
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu
2020-02-25 18:17:10 +08:00
committed by Jaegeuk Kim
parent dabfbbc8f9
commit a999150f4f
4 changed files with 65 additions and 6 deletions
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10
fs/f2fs/super.c
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@@ -1202,6 +1202,7 @@ static void f2fs_put_super(struct super_block *sb)
kvfree(sbi->raw_super);
destroy_device_list(sbi);
f2fs_destroy_xattr_caches(sbi);
mempool_destroy(sbi->write_io_dummy);
#ifdef CONFIG_QUOTA
for (i = 0; i < MAXQUOTAS; i++)
@@ -3458,12 +3459,17 @@ try_onemore:
}
}
/* init per sbi slab cache */
err = f2fs_init_xattr_caches(sbi);
if (err)
goto free_io_dummy;
/* get an inode for meta space */
sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
if (IS_ERR(sbi->meta_inode)) {
f2fs_err(sbi, "Failed to read F2FS meta data inode");
err = PTR_ERR(sbi->meta_inode);
goto free_io_dummy;
goto free_xattr_cache;
}
err = f2fs_get_valid_checkpoint(sbi);
@@ -3736,6 +3742,8 @@ free_meta_inode:
make_bad_inode(sbi->meta_inode);
iput(sbi->meta_inode);
sbi->meta_inode = NULL;
free_xattr_cache:
f2fs_destroy_xattr_caches(sbi);
free_io_dummy:
mempool_destroy(sbi->write_io_dummy);
free_percpu: