• Chao Yu's avatar
    f2fs: change recovery policy of xattr node block · d260081c
    Chao Yu authored
    Currently, if we call fsync after updating the xattr date belongs to the
    file, f2fs needs to trigger checkpoint to keep xattr data consistent. But,
    this policy cause low performance as checkpoint will block most foreground
    operations and cause unneeded and unrelated IOs around checkpoint.
    
    This patch will reuse regular file recovery policy for xattr node block,
    so, we change to write xattr node block tagged with fsync flag to warm
    area instead of cold area, and during recovery, we search warm node chain
    for fsynced xattr block, and do the recovery.
    
    So, for below application IO pattern, performance can be improved
    obviously:
    - touch file
    - create/update/delete xattr entry in file
    - fsync file
    Signed-off-by: default avatarChao Yu <yuchao0@huawei.com>
    Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
    d260081c
recovery.c 14.6 KB