* [PATCH] f2fs: fix to issue small discard in real-time mode discard
@ 2015-02-28 9:23 Chao Yu
2015-03-02 23:58 ` Changman Lee
0 siblings, 1 reply; 2+ messages in thread
From: Chao Yu @ 2015-02-28 9:23 UTC (permalink / raw)
To: Jaegeuk Kim, Changman Lee; +Cc: linux-f2fs-devel, linux-kernel
Now in f2fs, we share functions and structures for batch mode and real-time mode
discard. For real-time mode discard, in shared function add_discard_addrs, we
will use uninitialized trim_minlen in struct cp_control to compare with length
of contiguous free blocks to decide whether skipping discard fragmented freespace
or not, this makes us ignore small discard sometimes. Fix it.
Signed-off-by: Chao Yu <chao2.yu@samsung.com>
---
fs/f2fs/segment.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index daee4ab..fcc1cc2 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -549,7 +549,7 @@ static void add_discard_addrs(struct f2fs_sb_info *sbi, struct cp_control *cpc)
end = __find_rev_next_zero_bit(dmap, max_blocks, start + 1);
- if (end - start < cpc->trim_minlen)
+ if (force && end - start < cpc->trim_minlen)
continue;
__add_discard_entry(sbi, cpc, start, end);
--
2.3.1
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [PATCH] f2fs: fix to issue small discard in real-time mode discard
2015-02-28 9:23 [PATCH] f2fs: fix to issue small discard in real-time mode discard Chao Yu
@ 2015-03-02 23:58 ` Changman Lee
0 siblings, 0 replies; 2+ messages in thread
From: Changman Lee @ 2015-03-02 23:58 UTC (permalink / raw)
To: Chao Yu; +Cc: Jaegeuk Kim, linux-f2fs-devel, linux-kernel
On Sat, Feb 28, 2015 at 05:23:30PM +0800, Chao Yu wrote:
> Now in f2fs, we share functions and structures for batch mode and real-time mode
> discard. For real-time mode discard, in shared function add_discard_addrs, we
> will use uninitialized trim_minlen in struct cp_control to compare with length
> of contiguous free blocks to decide whether skipping discard fragmented freespace
> or not, this makes us ignore small discard sometimes. Fix it.
>
> Signed-off-by: Chao Yu <chao2.yu@samsung.com>
> ---
> fs/f2fs/segment.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
> index daee4ab..fcc1cc2 100644
> --- a/fs/f2fs/segment.c
> +++ b/fs/f2fs/segment.c
> @@ -549,7 +549,7 @@ static void add_discard_addrs(struct f2fs_sb_info *sbi, struct cp_control *cpc)
>
> end = __find_rev_next_zero_bit(dmap, max_blocks, start + 1);
>
> - if (end - start < cpc->trim_minlen)
> + if (force && end - start < cpc->trim_minlen)
> continue;
Reviewed-by : Changman Lee <cm224.lee@samsung.com>
>
> __add_discard_entry(sbi, cpc, start, end);
> --
> 2.3.1
>
^ permalink raw reply [flat|nested] 2+ messages in thread
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