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charset="us-ascii"; Format="flowed" Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net On 2024/11/2 5:06, Jaegeuk Kim wrote: > On 11/01, Chao Yu wrote: >> On 2024/11/1 9:22, Jaegeuk Kim wrote: >>> On 10/31, Chao Yu wrote: >>>> f2fs_map_blocks() supports to map continuous holes or preallocated >>>> address, we should avoid setting F2FS_MAP_MAPPED for these cases >>>> only, otherwise, it may fail f2fs_iomap_begin(), and make direct >>>> write fallbacking to use buffered IO and flush, result in performance >>>> regression. >>> >>> Is this fixing direct write or read? >> >> Direct write. > > I was confising the patch subject is saying direct read. Oops, sorry. > >> >>> >>>> >>>> Fixes: 9f0f6bf42714 ("f2fs: support to map continuous holes or preallocated address") >>>> Reported-by: kernel test robot >>>> Closes: https://lore.kernel.org/oe-lkp/202409122103.e45aa13b-oliver.sang@intel.com >>>> Cc: Cyril Hrubis >>>> Signed-off-by: Chao Yu >>>> --- >>>> fs/f2fs/data.c | 7 ++++++- >>>> 1 file changed, 6 insertions(+), 1 deletion(-) >>>> >>>> diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c >>>> index 306b86b0595d..38b85160c6bd 100644 >>>> --- a/fs/f2fs/data.c >>>> +++ b/fs/f2fs/data.c >>>> @@ -1676,7 +1676,12 @@ int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map, int flag) >>>> /* reserved delalloc block should be mapped for fiemap. */ >>>> if (blkaddr == NEW_ADDR) >>>> map->m_flags |= F2FS_MAP_DELALLOC; >>>> - if (flag != F2FS_GET_BLOCK_DIO || !is_hole) >>>> + /* >>>> + * f2fs_map_blocks() supports to map continuous holes or >>>> + * preallocated address, don't set F2FS_MAP_MAPPED for these >>>> + * cases only. >>>> + */ >>>> + if (flag != F2FS_GET_BLOCK_DIO || map->m_may_create || !is_hole) >>> >>> So, this is adding map->m_may_create, which is for writes? >> >> map->m_may_create is added for write path, w/o this condition, f2fs_map_blocks() >> may missed to tag F2FS_MAP_MAPPED, result in that f2fs_iomap_begin() will return >> -ENOTBLK. > > Is that something like this? > > /* DIO READ and hole case, should not map the blocks. */ > if (!(flag == F2FS_GET_BLOCK_DIO && is_hole && !map->m_may_create)) More clear, will update w/ this. Thanks, > >> >> Am I missing someting? >> >> Thanks, >> >>> >>>> map->m_flags |= F2FS_MAP_MAPPED; >>>> map->m_pblk = blkaddr; >>>> -- >>>> 2.40.1 _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel