[f2fs-dev] [PATCH 1/1] f2fs: avoid unnecessary block mapping lookups in f2fs_read_data_large_folio

[f2fs-dev] [PATCH 1/1] f2fs: avoid unnecessary block mapping lookups in f2fs_read_data_large_folio

[Yongpeng Yang]

From: Yongpeng Yang <yangyongpeng@xiaomi.com>

In the second call to f2fs_map_blocks within f2fs_read_data_large_folio,
map.m_len exceeds the logical address space to be read. This patch
ensures map.m_len does not exceed the required address space.

Signed-off-by: Yongpeng Yang <yangyongpeng@xiaomi.com>
---
 fs/f2fs/data.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index f32eb51ccee4..40c32267ead9 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -2456,7 +2456,7 @@ static int f2fs_read_data_large_folio(struct inode *inode,
 	ffs = NULL;
 	nrpages = folio_nr_pages(folio);
 
-	for (; nrpages; nrpages--) {
+	for (; nrpages; nrpages--, max_nr_pages--) {
 		sector_t block_nr;
 		/*
 		 * Map blocks using the previous result first.
-- 
2.43.0



_______________________________________________
Linux-f2fs-devel mailing list
Linux-f2fs-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel

Re: [f2fs-dev] [PATCH 1/1] f2fs: avoid unnecessary block mapping lookups in f2fs_read_data_large_folio

[Chao Yu via Linux-f2fs-devel]

On 1/9/2026 10:46 PM, Yongpeng Yang wrote:
> From: Yongpeng Yang <yangyongpeng@xiaomi.com>
> 
> In the second call to f2fs_map_blocks within f2fs_read_data_large_folio,
> map.m_len exceeds the logical address space to be read. This patch
> ensures map.m_len does not exceed the required address space.
> 
> Signed-off-by: Yongpeng Yang <yangyongpeng@xiaomi.com>

Reviewed-by: Chao Yu <chao@kernel.org>

Thanks,


_______________________________________________
Linux-f2fs-devel mailing list
Linux-f2fs-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel

Re: [f2fs-dev] [PATCH 1/1] f2fs: avoid unnecessary block mapping lookups in f2fs_read_data_large_folio

[patchwork-bot+f2fs--- via Linux-f2fs-devel]

Hello:

This patch was applied to jaegeuk/f2fs.git (dev)
by Jaegeuk Kim <jaegeuk@kernel.org>:

On Fri,  9 Jan 2026 22:46:18 +0800 you wrote:
> From: Yongpeng Yang <yangyongpeng@xiaomi.com>
> 
> In the second call to f2fs_map_blocks within f2fs_read_data_large_folio,
> map.m_len exceeds the logical address space to be read. This patch
> ensures map.m_len does not exceed the required address space.
> 
> Signed-off-by: Yongpeng Yang <yangyongpeng@xiaomi.com>
> 
> [...]

Here is the summary with links:
  - [f2fs-dev,1/1] f2fs: avoid unnecessary block mapping lookups in f2fs_read_data_large_folio
    https://git.kernel.org/jaegeuk/f2fs/c/540d34c18272

You are awesome, thank you!
-- 
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html




_______________________________________________
Linux-f2fs-devel mailing list
Linux-f2fs-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel