[PATCH 1/6] btrfs: send: use vmalloc only as fallback for send_buf

[David Sterba]

Signed-off-by: David Sterba <dste...@suse.com>
---
 fs/btrfs/send.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c
index 19b7bf4284ee..8f6f9d6d14df 100644
--- a/fs/btrfs/send.c
+++ b/fs/btrfs/send.c
@@ -6022,10 +6022,13 @@ long btrfs_ioctl_send(struct file *mnt_file, void 
__user *arg_)
        sctx->clone_roots_cnt = arg->clone_sources_count;
 
        sctx->send_max_size = BTRFS_SEND_BUF_SIZE;
-       sctx->send_buf = vmalloc(sctx->send_max_size);
+       sctx->send_buf = kmalloc(sctx->send_max_size, GFP_KERNEL | 
__GFP_NOWARN);
        if (!sctx->send_buf) {
-               ret = -ENOMEM;
-               goto out;
+               sctx->send_buf = vmalloc(sctx->send_max_size);
+               if (!sctx->send_buf) {
+                       ret = -ENOMEM;
+                       goto out;
+               }
        }
 
        sctx->read_buf = vmalloc(BTRFS_SEND_READ_SIZE);
@@ -6214,7 +6217,7 @@ long btrfs_ioctl_send(struct file *mnt_file, void __user 
*arg_)
                        fput(sctx->send_filp);
 
                vfree(sctx->clone_roots);
-               vfree(sctx->send_buf);
+               kvfree(sctx->send_buf);
                vfree(sctx->read_buf);
 
                name_cache_free(sctx);
-- 
2.7.1

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