In write_begin(), we skip checking dnode block for preallocating block when whole block needs to be updated since we preallocated its block in f2fs_preallocate_blocks, for partial updated block, we will still try to lock its node and do preallocation in write_begin(), so in f2fs_preallocate_blocks we should not preallocate its block.
But previously, the calculation of preallocating block number is incorrect, fix it. Signed-off-by: Chao Yu <[email protected]> --- fs/f2fs/data.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index ccb401e..dee3a78 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -626,7 +626,8 @@ ssize_t f2fs_preallocate_blocks(struct kiocb *iocb, struct iov_iter *from) ssize_t ret = 0; map.m_lblk = F2FS_BLK_ALIGN(iocb->ki_pos); - map.m_len = F2FS_BYTES_TO_BLK(iov_iter_count(from)); + map.m_len = F2FS_BYTES_TO_BLK(iocb->ki_pos + iov_iter_count(from)) - + map.m_lblk; map.m_next_pgofs = NULL; if (f2fs_encrypted_inode(inode)) -- 2.8.2.311.gee88674
