[f2fs-dev] [PATCH] f2fs: set default valid_thresh_ratio to 80 for zoned devices

[f2fs-dev] [PATCH] f2fs: set default valid_thresh_ratio to 80 for zoned devices

[Daeho Jeong]

From: Daeho Jeong <daehojeong@google.com>

Zoned storage devices provide marginal over-capacity space, typically
around 10%, for filesystem level storage control.

By utilizing this extra capacity, we can safely reduce the default
'valid_thresh_ratio' to 80. This action helps to significantly prevent
excessive garbage collection (GC) and the resulting power consumption,
as the filesystem becomes less aggressive about cleaning segments
that still hold a high percentage of valid data.

Signed-off-by: Daeho Jeong <daehojeong@google.com>
---
 fs/f2fs/gc.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/f2fs/gc.h b/fs/f2fs/gc.h
index 24e8b1c27acc..6c4d4567571e 100644
--- a/fs/f2fs/gc.h
+++ b/fs/f2fs/gc.h
@@ -25,7 +25,7 @@
 #define DEF_GC_THREAD_CANDIDATE_RATIO		20	/* select 20% oldest sections as candidates */
 #define DEF_GC_THREAD_MAX_CANDIDATE_COUNT	10	/* select at most 10 sections as candidates */
 #define DEF_GC_THREAD_AGE_WEIGHT		60	/* age weight */
-#define DEF_GC_THREAD_VALID_THRESH_RATIO	95	/* do not GC over 95% valid block ratio for one time GC */
+#define DEF_GC_THREAD_VALID_THRESH_RATIO	80	/* do not GC over 80% valid block ratio for one time GC */
 #define DEFAULT_ACCURACY_CLASS			10000	/* accuracy class */
 
 #define LIMIT_INVALID_BLOCK	40 /* percentage over total user space */
-- 
2.51.0.618.g983fd99d29-goog



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[f2fs-dev] [PATCH] f2fs: set default valid_thresh_ratio to 80 for zoned devices

[Daeho Jeong]

From: Daeho Jeong <daehojeong@google.com>

Zoned storage devices provide marginal over-capacity space, typically
around 10%, for filesystem level storage control.

By utilizing this extra capacity, we can safely reduce the default
'valid_thresh_ratio' to 80. This action helps to significantly prevent
excessive garbage collection (GC) and the resulting power consumption,
as the filesystem becomes less aggressive about cleaning segments
that still hold a high percentage of valid data.

Signed-off-by: Daeho Jeong <daehojeong@google.com>
---
 fs/f2fs/gc.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/f2fs/gc.h b/fs/f2fs/gc.h
index 24e8b1c27acc..6c4d4567571e 100644
--- a/fs/f2fs/gc.h
+++ b/fs/f2fs/gc.h
@@ -25,7 +25,7 @@
 #define DEF_GC_THREAD_CANDIDATE_RATIO		20	/* select 20% oldest sections as candidates */
 #define DEF_GC_THREAD_MAX_CANDIDATE_COUNT	10	/* select at most 10 sections as candidates */
 #define DEF_GC_THREAD_AGE_WEIGHT		60	/* age weight */
-#define DEF_GC_THREAD_VALID_THRESH_RATIO	95	/* do not GC over 95% valid block ratio for one time GC */
+#define DEF_GC_THREAD_VALID_THRESH_RATIO	80	/* do not GC over 80% valid block ratio for one time GC */
 #define DEFAULT_ACCURACY_CLASS			10000	/* accuracy class */
 
 #define LIMIT_INVALID_BLOCK	40 /* percentage over total user space */
-- 
2.51.0.618.g983fd99d29-goog



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Re: [f2fs-dev] [PATCH] f2fs: set default valid_thresh_ratio to 80 for zoned devices

[Chao Yu via Linux-f2fs-devel]

On 10/4/2025 6:49 AM, Daeho Jeong wrote:
> From: Daeho Jeong <daehojeong@google.com>
> 
> Zoned storage devices provide marginal over-capacity space, typically
> around 10%, for filesystem level storage control.
> 
> By utilizing this extra capacity, we can safely reduce the default
> 'valid_thresh_ratio' to 80. This action helps to significantly prevent
> excessive garbage collection (GC) and the resulting power consumption,
> as the filesystem becomes less aggressive about cleaning segments
> that still hold a high percentage of valid data.
> 
> Signed-off-by: Daeho Jeong <daehojeong@google.com>

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

Thanks,


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Re: [f2fs-dev] [PATCH] f2fs: set default valid_thresh_ratio to 80 for zoned devices

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

Hello:

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

On Tue,  7 Oct 2025 09:46:14 -0700 you wrote:
> From: Daeho Jeong <daehojeong@google.com>
> 
> Zoned storage devices provide marginal over-capacity space, typically
> around 10%, for filesystem level storage control.
> 
> By utilizing this extra capacity, we can safely reduce the default
> 'valid_thresh_ratio' to 80. This action helps to significantly prevent
> excessive garbage collection (GC) and the resulting power consumption,
> as the filesystem becomes less aggressive about cleaning segments
> that still hold a high percentage of valid data.
> 
> [...]

Here is the summary with links:
  - [f2fs-dev] f2fs: set default valid_thresh_ratio to 80 for zoned devices
    https://git.kernel.org/jaegeuk/f2fs/c/9a25aeb2be7a

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




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