From 425d17a290c0c63785ec65db154a95c6337aeefa Mon Sep 17 00:00:00 2001 From: Liu Bo Date: Fri, 7 Sep 2012 20:01:30 -0600 Subject: [PATCH] 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 Signed-off-by: Liu Bo --- fs/btrfs/backref.c | 5 +++-- fs/btrfs/ioctl.c | 4 ++-- 2 files changed, 5 insertions(+), 4 deletions(-) diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c index ab286e5bfe33..7084431b7c9c 100644 --- a/fs/btrfs/backref.c +++ b/fs/btrfs/backref.c @@ -16,6 +16,7 @@ * Boston, MA 021110-1307, USA. */ +#include #include "ctree.h" #include "disk-io.h" #include "backref.h" @@ -1584,7 +1585,7 @@ struct btrfs_data_container *init_data_container(u32 total_bytes) 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 @@ void free_ipath(struct inode_fs_paths *ipath) { if (!ipath) return; - kfree(ipath->fspath); + vfree(ipath->fspath); kfree(ipath); } diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index fa1284d596ea..38e3d6ab89d3 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -3230,7 +3230,7 @@ static long btrfs_ioctl_logical_to_ino(struct btrfs_root *root, 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 @@ static long btrfs_ioctl_logical_to_ino(struct btrfs_root *root, out: btrfs_free_path(path); - kfree(inodes); + vfree(inodes); kfree(loi); return ret;