If the range we write cover the whole valid data in the last page, we do not need to read it.
Signed-off-by: Yunlei He <[email protected]> --- fs/f2fs/data.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index 9ac2625..303873f 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -1715,6 +1715,9 @@ static int f2fs_write_begin(struct file *file, struct address_space *mapping, if (len == PAGE_SIZE || PageUptodate(page)) return 0; + if (!(pos & (PAGE_SIZE - 1)) && (pos + len) >= i_size_read(inode)) + return 0; + if (blkaddr == NEW_ADDR) { zero_user_segment(page, 0, PAGE_SIZE); SetPageUptodate(page); @@ -1768,7 +1771,7 @@ static int f2fs_write_end(struct file *file, * let generic_perform_write() try to copy data again through copied=0. */ if (!PageUptodate(page)) { - if (unlikely(copied != PAGE_SIZE)) + if (unlikely(copied != len)) copied = 0; else SetPageUptodate(page); -- 2.10.1 ------------------------------------------------------------------------------ Developer Access Program for Intel Xeon Phi Processors Access to Intel Xeon Phi processor-based developer platforms. With one year of Intel Parallel Studio XE. Training and support from Colfax. Order your platform today.http://sdm.link/intel _______________________________________________ Linux-f2fs-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
