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authorChao Yu <yuchao0@huawei.com>2016-05-09 19:56:31 +0800
committerJaegeuk Kim <jaegeuk@kernel.org>2016-05-11 09:56:36 -0700
commit6e9619499f53b22ead972e476c0e8341c997d929 (patch)
tree0e026991b79762ea8ed14aa4f537e049a6deded6 /MAINTAINERS
parent46008c6d42328710f9beaf5c2b47dc92b1cc1a75 (diff)
f2fs: support in batch fzero in dnode page
This patch tries to speedup fzero_range by making space preallocation and address removal of blocks in one dnode page as in batch operation. In virtual machine, with zram driver: dd if=/dev/zero of=/mnt/f2fs/file bs=1M count=4096 time xfs_io -f /mnt/f2fs/file -c "fzero 0 4096M" Before: real 0m3.276s user 0m0.008s sys 0m3.260s After: real 0m1.568s user 0m0.000s sys 0m1.564s Signed-off-by: Chao Yu <yuchao0@huawei.com> [Jaegeuk Kim: consider ENOSPC case] Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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