• Jan Kara's avatar
    ext4: do not ask jbd2 to write data for delalloc buffers · ee0876bc
    Jan Kara authored
    Currently we ask jbd2 to write all dirty allocated buffers before
    committing a transaction when doing writeback of delay allocated blocks.
    However this is unnecessary since we move all pages to writeback state
    before dropping a transaction handle and then submit all the necessary
    IO. We still need the transaction commit to wait for all the outstanding
    writeback before flushing disk caches during transaction commit to avoid
    data exposure issues though. Use the new jbd2 capability and ask it to
    only wait for outstanding writeback during transaction commit when
    writing back data in ext4_writepages().
    Tested-by: default avatar"HUANG Weller (CM/ESW12-CN)" <Weller.Huang@cn.bosch.com>
    Signed-off-by: default avatarJan Kara <jack@suse.cz>
    Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
    ee0876bc
move_extent.c 21 KB