Btrfs: use larger limit for translation of logical to inode
This is the change of the kernel side.
Translation of logical to inode used to have an upper limit 4k on
inode container's size, but the limit is not large enough for a data
with a great many of refs, so when resolving logical address,
we can end up with
"ioctl ret=0, bytes_left=0, bytes_missing=19944, cnt=510, missed=2493"
This changes to regard 64k as the upper limit and use vmalloc instead of
kmalloc to get memory more easily.
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c
index ab286e5..7084431b 100644
--- a/fs/btrfs/backref.c
+++ b/fs/btrfs/backref.c
@@ -16,6 +16,7 @@
* Boston, MA 021110-1307, USA.
*/
+#include <linux/vmalloc.h>
#include "ctree.h"
#include "disk-io.h"
#include "backref.h"
@@ -1584,7 +1585,7 @@
size_t alloc_bytes;
alloc_bytes = max_t(size_t, total_bytes, sizeof(*data));
- data = kmalloc(alloc_bytes, GFP_NOFS);
+ data = vmalloc(alloc_bytes);
if (!data)
return ERR_PTR(-ENOMEM);
@@ -1635,6 +1636,6 @@
{
if (!ipath)
return;
- kfree(ipath->fspath);
+ vfree(ipath->fspath);
kfree(ipath);
}
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index fa1284d..38e3d6a 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -3230,7 +3230,7 @@
goto out;
}
- size = min_t(u32, loi->size, 4096);
+ size = min_t(u32, loi->size, 64 * 1024);
inodes = init_data_container(size);
if (IS_ERR(inodes)) {
ret = PTR_ERR(inodes);
@@ -3252,7 +3252,7 @@
out:
btrfs_free_path(path);
- kfree(inodes);
+ vfree(inodes);
kfree(loi);
return ret;