Hi, inspired by a recent fix where we tried to kmalloc a 64k nodesize buffer, without the vmalloc fallback, and failed. This series add the "kmalloc-first and vmalloc-fallback" logic to more places, namely to the buffers used during send. If the memory is not fragmented, kmalloc succeeds and does not take the resources required for the mappings.
---------------------------------------------------------------- The following changes since commit 56f23fdbb600e6087db7b009775b95ce07cc3195: Btrfs: fix file/data loss caused by fsync after rename and new inode (2016-04-06 17:01:44 -0700) are available in the git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux.git dev/kvalloc for you to fetch changes up to c3e3930516c4d14ed1d6d70964fbc4f3faa36844: btrfs: clone: use vmalloc only as fallback for nodesize bufer (2016-04-11 19:06:39 +0200) ---------------------------------------------------------------- David Sterba (6): btrfs: send: use vmalloc only as fallback for send_buf btrfs: send: use vmalloc only as fallback for read_buf btrfs: send: use temporary variable to store allocation size btrfs: send: use vmalloc only as fallback for clone_roots btrfs: send: use vmalloc only as fallback for clone_sources_tmp btrfs: clone: use vmalloc only as fallback for nodesize bufer fs/btrfs/ioctl.c | 13 ++++++++----- fs/btrfs/send.c | 56 +++++++++++++++++++++++++++++++++++--------------------- 2 files changed, 43 insertions(+), 26 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html