lkml.org 
[lkml]   [2021]   [Jul]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [f2fs-dev] [PATCH v2] f2fs: add sysfs nodes to get GC info for each GC mode
From
Date
On 2021/7/10 4:44, Daeho Jeong wrote:
> From: Daeho Jeong <daehojeong@google.com>
>
> Added gc_dirty_segs and gc_dirty_segs_mode sysfs nodes.
> 1) "gc_dirty_segs" shows how many dirty segments have been
> reclaimed by GC during a specific GC mode.
> 2) "gc_dirty_segs_mode" is used to control for which gc mode
> the "gc_dirty_segs" node shows.
>
> Signed-off-by: Daeho Jeong <daehojeong@google.com>
> ---
> Documentation/ABI/testing/sysfs-fs-f2fs | 14 +++++++++++++
> fs/f2fs/debug.c | 9 ++++++++
> fs/f2fs/f2fs.h | 5 +++++
> fs/f2fs/gc.c | 1 +
> fs/f2fs/sysfs.c | 28 +++++++++++++++++++++++++
> 5 files changed, 57 insertions(+)
>
> diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs b/Documentation/ABI/testing/sysfs-fs-f2fs
> index 95155e4ec7fe..0d863eb185f6 100644
> --- a/Documentation/ABI/testing/sysfs-fs-f2fs
> +++ b/Documentation/ABI/testing/sysfs-fs-f2fs
> @@ -493,3 +493,17 @@ Contact: "Chao Yu" <yuchao0@huawei.com>
> Description: When ATGC is on, it controls age threshold to bypass GCing young
> candidates whose age is not beyond the threshold, by default it was
> initialized as 604800 seconds (equals to 7 days).
> +
> +What: /sys/fs/f2fs/<disk>/gc_dirty_segs

How about renaming gc_dirty_segs to gc_reclaimed_segments?

> +Date: July 2021
> +Contact: "Daeho Jeong" <daehojeong@google.com>
> +Description: Show how many dirty segments have been reclaimed by GC during
> + a specific GC mode (0: GC normal, 1: GC idle CB, 2: GC idle greedy,
> + 3: gc idle AT, 4: GC urgent high, 5: GC urgent low)

3. GC idle AT

> + You can re-initialize this value to "0".
> +
> +What: /sys/fs/f2fs/<disk>/gc_dirty_segs_mode

You know, F2FS_IOC_FLUSH_DEVICE/F2FS_IOC_RESIZE_FS needs to migrate all
blocks of target segment to other place, no matter the segment has partially
or fully valid blocks, so it looks 'gc_segment_mode' will be more appropriate?

Thanks,

\
 
 \ /
  Last update: 2021-07-10 02:17    [W:0.197 / U:0.076 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site