* [PATCH] f2fs: stop iterating f2fs_map_block if hole exists
@ 2023-10-03 22:52 ` Jaegeuk Kim
0 siblings, 0 replies; 8+ messages in thread
From: Jaegeuk Kim @ 2023-10-03 22:52 UTC (permalink / raw)
To: linux-kernel, linux-f2fs-devel; +Cc: Jaegeuk Kim
Let's avoid unnecessary f2fs_map_block calls to load extents.
# f2fs_io fadvise willneed 0 4096 /data/local/tmp/test
f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 386, start blkaddr = 0x34ac00, len = 0x1400, flags = 2,
f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 5506, start blkaddr = 0x34c200, len = 0x1000, flags = 2,
f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 9602, start blkaddr = 0x34d600, len = 0x1200, flags = 2,
f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 14210, start blkaddr = 0x34ec00, len = 0x400, flags = 2,
f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 15235, start blkaddr = 0x34f401, len = 0xbff, flags = 2,
f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 18306, start blkaddr = 0x350200, len = 0x1200, flags = 2
f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 22915, start blkaddr = 0x351601, len = 0xa7d, flags = 2
f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 25600, start blkaddr = 0x351601, len = 0x0, flags = 0
f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 25601, start blkaddr = 0x351601, len = 0x0, flags = 0
f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 25602, start blkaddr = 0x351601, len = 0x0, flags = 0
...
f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 1037188, start blkaddr = 0x351601, len = 0x0, flags = 0
f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 1038206, start blkaddr = 0x351601, len = 0x0, flags = 0
f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 1039224, start blkaddr = 0x351601, len = 0x0, flags = 0
f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 2075548, start blkaddr = 0x351601, len = 0x0, flags = 0
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---
fs/f2fs/file.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 161826c6e200..2403fd1de5a0 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -3270,7 +3270,7 @@ int f2fs_precache_extents(struct inode *inode)
f2fs_down_write(&fi->i_gc_rwsem[WRITE]);
err = f2fs_map_blocks(inode, &map, F2FS_GET_BLOCK_PRECACHE);
f2fs_up_write(&fi->i_gc_rwsem[WRITE]);
- if (err)
+ if (err || !map.m_len)
return err;
map.m_lblk = m_next_extent;
--
2.42.0.582.g8ccd20d70d-goog
^ permalink raw reply related [flat|nested] 8+ messages in thread
* [f2fs-dev] [PATCH] f2fs: stop iterating f2fs_map_block if hole exists
@ 2023-10-03 22:52 ` Jaegeuk Kim
0 siblings, 0 replies; 8+ messages in thread
From: Jaegeuk Kim @ 2023-10-03 22:52 UTC (permalink / raw)
To: linux-kernel, linux-f2fs-devel; +Cc: Jaegeuk Kim
Let's avoid unnecessary f2fs_map_block calls to load extents.
# f2fs_io fadvise willneed 0 4096 /data/local/tmp/test
f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 386, start blkaddr = 0x34ac00, len = 0x1400, flags = 2,
f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 5506, start blkaddr = 0x34c200, len = 0x1000, flags = 2,
f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 9602, start blkaddr = 0x34d600, len = 0x1200, flags = 2,
f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 14210, start blkaddr = 0x34ec00, len = 0x400, flags = 2,
f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 15235, start blkaddr = 0x34f401, len = 0xbff, flags = 2,
f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 18306, start blkaddr = 0x350200, len = 0x1200, flags = 2
f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 22915, start blkaddr = 0x351601, len = 0xa7d, flags = 2
f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 25600, start blkaddr = 0x351601, len = 0x0, flags = 0
f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 25601, start blkaddr = 0x351601, len = 0x0, flags = 0
f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 25602, start blkaddr = 0x351601, len = 0x0, flags = 0
...
f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 1037188, start blkaddr = 0x351601, len = 0x0, flags = 0
f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 1038206, start blkaddr = 0x351601, len = 0x0, flags = 0
f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 1039224, start blkaddr = 0x351601, len = 0x0, flags = 0
f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 2075548, start blkaddr = 0x351601, len = 0x0, flags = 0
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---
fs/f2fs/file.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 161826c6e200..2403fd1de5a0 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -3270,7 +3270,7 @@ int f2fs_precache_extents(struct inode *inode)
f2fs_down_write(&fi->i_gc_rwsem[WRITE]);
err = f2fs_map_blocks(inode, &map, F2FS_GET_BLOCK_PRECACHE);
f2fs_up_write(&fi->i_gc_rwsem[WRITE]);
- if (err)
+ if (err || !map.m_len)
return err;
map.m_lblk = m_next_extent;
--
2.42.0.582.g8ccd20d70d-goog
_______________________________________________
Linux-f2fs-devel mailing list
Linux-f2fs-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
^ permalink raw reply related [flat|nested] 8+ messages in thread
* Re: [f2fs-dev] [PATCH] f2fs: stop iterating f2fs_map_block if hole exists
2023-10-03 22:52 ` [f2fs-dev] " Jaegeuk Kim
@ 2023-10-07 7:40 ` Chao Yu
-1 siblings, 0 replies; 8+ messages in thread
From: Chao Yu @ 2023-10-07 7:40 UTC (permalink / raw)
To: Jaegeuk Kim, linux-kernel, linux-f2fs-devel
On 2023/10/4 6:52, Jaegeuk Kim wrote:
> Let's avoid unnecessary f2fs_map_block calls to load extents.
>
> # f2fs_io fadvise willneed 0 4096 /data/local/tmp/test
>
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 386, start blkaddr = 0x34ac00, len = 0x1400, flags = 2,
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 5506, start blkaddr = 0x34c200, len = 0x1000, flags = 2,
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 9602, start blkaddr = 0x34d600, len = 0x1200, flags = 2,
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 14210, start blkaddr = 0x34ec00, len = 0x400, flags = 2,
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 15235, start blkaddr = 0x34f401, len = 0xbff, flags = 2,
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 18306, start blkaddr = 0x350200, len = 0x1200, flags = 2
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 22915, start blkaddr = 0x351601, len = 0xa7d, flags = 2
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 25600, start blkaddr = 0x351601, len = 0x0, flags = 0
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 25601, start blkaddr = 0x351601, len = 0x0, flags = 0
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 25602, start blkaddr = 0x351601, len = 0x0, flags = 0
> ...
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 1037188, start blkaddr = 0x351601, len = 0x0, flags = 0
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 1038206, start blkaddr = 0x351601, len = 0x0, flags = 0
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 1039224, start blkaddr = 0x351601, len = 0x0, flags = 0
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 2075548, start blkaddr = 0x351601, len = 0x0, flags = 0
Jaegeuk,
Not sure, but it looks it's due to f2fs_precache_extents() will traverse file
w/ range [0, max_file_blocks), since data which exceeds EOF will always be zero,
so it's not necessary to precache its mapping info, so we'd better adjust upper
boundary to i_size rather than max_file_blocks().
>
> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
> ---
> fs/f2fs/file.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
> index 161826c6e200..2403fd1de5a0 100644
> --- a/fs/f2fs/file.c
> +++ b/fs/f2fs/file.c
> @@ -3270,7 +3270,7 @@ int f2fs_precache_extents(struct inode *inode)
> f2fs_down_write(&fi->i_gc_rwsem[WRITE]);
> err = f2fs_map_blocks(inode, &map, F2FS_GET_BLOCK_PRECACHE);
> f2fs_up_write(&fi->i_gc_rwsem[WRITE]);
> - if (err)
> + if (err || !map.m_len)
Well, if there is a hole in the head of file, it may break here rather
than precaching following valid map info.
What about passing parameter offset|len from f2fs_file_fadvise() to
f2fs_precache_extents(), and then precaching mapping info on demand.
Thanks,
> return err;
>
> map.m_lblk = m_next_extent;
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [f2fs-dev] [PATCH] f2fs: stop iterating f2fs_map_block if hole exists
@ 2023-10-07 7:40 ` Chao Yu
0 siblings, 0 replies; 8+ messages in thread
From: Chao Yu @ 2023-10-07 7:40 UTC (permalink / raw)
To: Jaegeuk Kim, linux-kernel, linux-f2fs-devel
On 2023/10/4 6:52, Jaegeuk Kim wrote:
> Let's avoid unnecessary f2fs_map_block calls to load extents.
>
> # f2fs_io fadvise willneed 0 4096 /data/local/tmp/test
>
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 386, start blkaddr = 0x34ac00, len = 0x1400, flags = 2,
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 5506, start blkaddr = 0x34c200, len = 0x1000, flags = 2,
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 9602, start blkaddr = 0x34d600, len = 0x1200, flags = 2,
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 14210, start blkaddr = 0x34ec00, len = 0x400, flags = 2,
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 15235, start blkaddr = 0x34f401, len = 0xbff, flags = 2,
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 18306, start blkaddr = 0x350200, len = 0x1200, flags = 2
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 22915, start blkaddr = 0x351601, len = 0xa7d, flags = 2
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 25600, start blkaddr = 0x351601, len = 0x0, flags = 0
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 25601, start blkaddr = 0x351601, len = 0x0, flags = 0
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 25602, start blkaddr = 0x351601, len = 0x0, flags = 0
> ...
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 1037188, start blkaddr = 0x351601, len = 0x0, flags = 0
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 1038206, start blkaddr = 0x351601, len = 0x0, flags = 0
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 1039224, start blkaddr = 0x351601, len = 0x0, flags = 0
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 2075548, start blkaddr = 0x351601, len = 0x0, flags = 0
Jaegeuk,
Not sure, but it looks it's due to f2fs_precache_extents() will traverse file
w/ range [0, max_file_blocks), since data which exceeds EOF will always be zero,
so it's not necessary to precache its mapping info, so we'd better adjust upper
boundary to i_size rather than max_file_blocks().
>
> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
> ---
> fs/f2fs/file.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
> index 161826c6e200..2403fd1de5a0 100644
> --- a/fs/f2fs/file.c
> +++ b/fs/f2fs/file.c
> @@ -3270,7 +3270,7 @@ int f2fs_precache_extents(struct inode *inode)
> f2fs_down_write(&fi->i_gc_rwsem[WRITE]);
> err = f2fs_map_blocks(inode, &map, F2FS_GET_BLOCK_PRECACHE);
> f2fs_up_write(&fi->i_gc_rwsem[WRITE]);
> - if (err)
> + if (err || !map.m_len)
Well, if there is a hole in the head of file, it may break here rather
than precaching following valid map info.
What about passing parameter offset|len from f2fs_file_fadvise() to
f2fs_precache_extents(), and then precaching mapping info on demand.
Thanks,
> return err;
>
> map.m_lblk = m_next_extent;
_______________________________________________
Linux-f2fs-devel mailing list
Linux-f2fs-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [f2fs-dev] [PATCH] f2fs: stop iterating f2fs_map_block if hole exists
2023-10-07 7:40 ` Chao Yu
@ 2023-10-09 17:56 ` Jaegeuk Kim
-1 siblings, 0 replies; 8+ messages in thread
From: Jaegeuk Kim @ 2023-10-09 17:56 UTC (permalink / raw)
To: Chao Yu; +Cc: linux-kernel, linux-f2fs-devel
On 10/07, Chao Yu wrote:
> On 2023/10/4 6:52, Jaegeuk Kim wrote:
> > Let's avoid unnecessary f2fs_map_block calls to load extents.
> >
> > # f2fs_io fadvise willneed 0 4096 /data/local/tmp/test
> >
> > f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 386, start blkaddr = 0x34ac00, len = 0x1400, flags = 2,
> > f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 5506, start blkaddr = 0x34c200, len = 0x1000, flags = 2,
> > f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 9602, start blkaddr = 0x34d600, len = 0x1200, flags = 2,
> > f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 14210, start blkaddr = 0x34ec00, len = 0x400, flags = 2,
> > f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 15235, start blkaddr = 0x34f401, len = 0xbff, flags = 2,
> > f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 18306, start blkaddr = 0x350200, len = 0x1200, flags = 2
> > f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 22915, start blkaddr = 0x351601, len = 0xa7d, flags = 2
> > f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 25600, start blkaddr = 0x351601, len = 0x0, flags = 0
> > f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 25601, start blkaddr = 0x351601, len = 0x0, flags = 0
> > f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 25602, start blkaddr = 0x351601, len = 0x0, flags = 0
> > ...
> > f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 1037188, start blkaddr = 0x351601, len = 0x0, flags = 0
> > f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 1038206, start blkaddr = 0x351601, len = 0x0, flags = 0
> > f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 1039224, start blkaddr = 0x351601, len = 0x0, flags = 0
> > f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 2075548, start blkaddr = 0x351601, len = 0x0, flags = 0
>
> Jaegeuk,
>
> Not sure, but it looks it's due to f2fs_precache_extents() will traverse file
> w/ range [0, max_file_blocks), since data which exceeds EOF will always be zero,
> so it's not necessary to precache its mapping info, so we'd better adjust upper
> boundary to i_size rather than max_file_blocks().
>
> >
> > Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
> > ---
> > fs/f2fs/file.c | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
> > index 161826c6e200..2403fd1de5a0 100644
> > --- a/fs/f2fs/file.c
> > +++ b/fs/f2fs/file.c
> > @@ -3270,7 +3270,7 @@ int f2fs_precache_extents(struct inode *inode)
> > f2fs_down_write(&fi->i_gc_rwsem[WRITE]);
> > err = f2fs_map_blocks(inode, &map, F2FS_GET_BLOCK_PRECACHE);
> > f2fs_up_write(&fi->i_gc_rwsem[WRITE]);
> > - if (err)
> > + if (err || !map.m_len)
> Well, if there is a hole in the head of file, it may break here rather
> than precaching following valid map info.
>
> What about passing parameter offset|len from f2fs_file_fadvise() to
> f2fs_precache_extents(), and then precaching mapping info on demand.
I'd rather stop reading metadata if it meets a hole within i_size, since this
gives benefits when reading the entire non-hole case, FWIW. Rather than that,
I think generic readahead flow can hide the metadata loading.
>
> Thanks,
>
> > return err;
> > map.m_lblk = m_next_extent;
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [f2fs-dev] [PATCH] f2fs: stop iterating f2fs_map_block if hole exists
@ 2023-10-09 17:56 ` Jaegeuk Kim
0 siblings, 0 replies; 8+ messages in thread
From: Jaegeuk Kim @ 2023-10-09 17:56 UTC (permalink / raw)
To: Chao Yu; +Cc: linux-kernel, linux-f2fs-devel
On 10/07, Chao Yu wrote:
> On 2023/10/4 6:52, Jaegeuk Kim wrote:
> > Let's avoid unnecessary f2fs_map_block calls to load extents.
> >
> > # f2fs_io fadvise willneed 0 4096 /data/local/tmp/test
> >
> > f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 386, start blkaddr = 0x34ac00, len = 0x1400, flags = 2,
> > f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 5506, start blkaddr = 0x34c200, len = 0x1000, flags = 2,
> > f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 9602, start blkaddr = 0x34d600, len = 0x1200, flags = 2,
> > f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 14210, start blkaddr = 0x34ec00, len = 0x400, flags = 2,
> > f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 15235, start blkaddr = 0x34f401, len = 0xbff, flags = 2,
> > f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 18306, start blkaddr = 0x350200, len = 0x1200, flags = 2
> > f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 22915, start blkaddr = 0x351601, len = 0xa7d, flags = 2
> > f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 25600, start blkaddr = 0x351601, len = 0x0, flags = 0
> > f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 25601, start blkaddr = 0x351601, len = 0x0, flags = 0
> > f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 25602, start blkaddr = 0x351601, len = 0x0, flags = 0
> > ...
> > f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 1037188, start blkaddr = 0x351601, len = 0x0, flags = 0
> > f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 1038206, start blkaddr = 0x351601, len = 0x0, flags = 0
> > f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 1039224, start blkaddr = 0x351601, len = 0x0, flags = 0
> > f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 2075548, start blkaddr = 0x351601, len = 0x0, flags = 0
>
> Jaegeuk,
>
> Not sure, but it looks it's due to f2fs_precache_extents() will traverse file
> w/ range [0, max_file_blocks), since data which exceeds EOF will always be zero,
> so it's not necessary to precache its mapping info, so we'd better adjust upper
> boundary to i_size rather than max_file_blocks().
>
> >
> > Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
> > ---
> > fs/f2fs/file.c | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
> > index 161826c6e200..2403fd1de5a0 100644
> > --- a/fs/f2fs/file.c
> > +++ b/fs/f2fs/file.c
> > @@ -3270,7 +3270,7 @@ int f2fs_precache_extents(struct inode *inode)
> > f2fs_down_write(&fi->i_gc_rwsem[WRITE]);
> > err = f2fs_map_blocks(inode, &map, F2FS_GET_BLOCK_PRECACHE);
> > f2fs_up_write(&fi->i_gc_rwsem[WRITE]);
> > - if (err)
> > + if (err || !map.m_len)
> Well, if there is a hole in the head of file, it may break here rather
> than precaching following valid map info.
>
> What about passing parameter offset|len from f2fs_file_fadvise() to
> f2fs_precache_extents(), and then precaching mapping info on demand.
I'd rather stop reading metadata if it meets a hole within i_size, since this
gives benefits when reading the entire non-hole case, FWIW. Rather than that,
I think generic readahead flow can hide the metadata loading.
>
> Thanks,
>
> > return err;
> > map.m_lblk = m_next_extent;
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^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [f2fs-dev] [PATCH] f2fs: stop iterating f2fs_map_block if hole exists
2023-10-03 22:52 ` [f2fs-dev] " Jaegeuk Kim
@ 2023-10-23 15:30 ` patchwork-bot+f2fs
-1 siblings, 0 replies; 8+ messages in thread
From: patchwork-bot+f2fs @ 2023-10-23 15:30 UTC (permalink / raw)
To: Jaegeuk Kim; +Cc: linux-kernel, linux-f2fs-devel
Hello:
This patch was applied to jaegeuk/f2fs.git (dev)
by Jaegeuk Kim <jaegeuk@kernel.org>:
On Tue, 3 Oct 2023 15:52:08 -0700 you wrote:
> Let's avoid unnecessary f2fs_map_block calls to load extents.
>
> # f2fs_io fadvise willneed 0 4096 /data/local/tmp/test
>
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 386, start blkaddr = 0x34ac00, len = 0x1400, flags = 2,
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 5506, start blkaddr = 0x34c200, len = 0x1000, flags = 2,
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 9602, start blkaddr = 0x34d600, len = 0x1200, flags = 2,
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 14210, start blkaddr = 0x34ec00, len = 0x400, flags = 2,
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 15235, start blkaddr = 0x34f401, len = 0xbff, flags = 2,
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 18306, start blkaddr = 0x350200, len = 0x1200, flags = 2
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 22915, start blkaddr = 0x351601, len = 0xa7d, flags = 2
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 25600, start blkaddr = 0x351601, len = 0x0, flags = 0
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 25601, start blkaddr = 0x351601, len = 0x0, flags = 0
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 25602, start blkaddr = 0x351601, len = 0x0, flags = 0
> ...
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 1037188, start blkaddr = 0x351601, len = 0x0, flags = 0
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 1038206, start blkaddr = 0x351601, len = 0x0, flags = 0
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 1039224, start blkaddr = 0x351601, len = 0x0, flags = 0
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 2075548, start blkaddr = 0x351601, len = 0x0, flags = 0
>
> [...]
Here is the summary with links:
- [f2fs-dev] f2fs: stop iterating f2fs_map_block if hole exists
https://git.kernel.org/jaegeuk/f2fs/c/4ed33e69e136
You are awesome, thank you!
--
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [f2fs-dev] [PATCH] f2fs: stop iterating f2fs_map_block if hole exists
@ 2023-10-23 15:30 ` patchwork-bot+f2fs
0 siblings, 0 replies; 8+ messages in thread
From: patchwork-bot+f2fs @ 2023-10-23 15:30 UTC (permalink / raw)
To: Jaegeuk Kim; +Cc: linux-kernel, linux-f2fs-devel
Hello:
This patch was applied to jaegeuk/f2fs.git (dev)
by Jaegeuk Kim <jaegeuk@kernel.org>:
On Tue, 3 Oct 2023 15:52:08 -0700 you wrote:
> Let's avoid unnecessary f2fs_map_block calls to load extents.
>
> # f2fs_io fadvise willneed 0 4096 /data/local/tmp/test
>
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 386, start blkaddr = 0x34ac00, len = 0x1400, flags = 2,
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 5506, start blkaddr = 0x34c200, len = 0x1000, flags = 2,
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 9602, start blkaddr = 0x34d600, len = 0x1200, flags = 2,
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 14210, start blkaddr = 0x34ec00, len = 0x400, flags = 2,
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 15235, start blkaddr = 0x34f401, len = 0xbff, flags = 2,
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 18306, start blkaddr = 0x350200, len = 0x1200, flags = 2
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 22915, start blkaddr = 0x351601, len = 0xa7d, flags = 2
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 25600, start blkaddr = 0x351601, len = 0x0, flags = 0
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 25601, start blkaddr = 0x351601, len = 0x0, flags = 0
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 25602, start blkaddr = 0x351601, len = 0x0, flags = 0
> ...
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 1037188, start blkaddr = 0x351601, len = 0x0, flags = 0
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 1038206, start blkaddr = 0x351601, len = 0x0, flags = 0
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 1039224, start blkaddr = 0x351601, len = 0x0, flags = 0
> f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 2075548, start blkaddr = 0x351601, len = 0x0, flags = 0
>
> [...]
Here is the summary with links:
- [f2fs-dev] f2fs: stop iterating f2fs_map_block if hole exists
https://git.kernel.org/jaegeuk/f2fs/c/4ed33e69e136
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
^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2023-10-23 15:30 UTC | newest]
Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2023-10-03 22:52 [PATCH] f2fs: stop iterating f2fs_map_block if hole exists Jaegeuk Kim
2023-10-03 22:52 ` [f2fs-dev] " Jaegeuk Kim
2023-10-07 7:40 ` Chao Yu
2023-10-07 7:40 ` Chao Yu
2023-10-09 17:56 ` Jaegeuk Kim
2023-10-09 17:56 ` Jaegeuk Kim
2023-10-23 15:30 ` patchwork-bot+f2fs
2023-10-23 15:30 ` patchwork-bot+f2fs
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