From: Chao Yu <chao@kernel.org>
To: Jaegeuk Kim <jaegeuk@kernel.org>
Cc: linux-kernel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net
Subject: Re: [f2fs-dev] [PATCH 2/3] f2fs: run GCs synchronously given user requests
Date: Wed, 22 Jun 2022 22:02:29 +0800 [thread overview]
Message-ID: <27138a10-a6b2-edad-1985-687a95b9039b@kernel.org> (raw)
In-Reply-To: <Yq+kiXPyBsXgdYb2@google.com>
On 2022/6/20 6:34, Jaegeuk Kim wrote:
> On 06/19, Chao Yu wrote:
>> On 2022/6/18 6:31, Jaegeuk Kim wrote:
>>> When users set GC_URGENT or GC_MID, they expected to do GCs right away.
>>> But, there's a condition to bypass it. Let's indicate we need to do now
>>> in the thread.
>>
>> .should_migrate_blocks is used to force migrating blocks in full
>> section, so what is the condition here? GC should not never select
>> a full section, right?
>
> I think it'll move a full section given .victim_segno is not NULL_SEGNO,
> as __get_victim will give a dirty segment all the time. wdyt?
However, in gc_thread_fun() victim_segno is NULL_SEGNO all the time.
I guess .should_migrate_blocks should only be set to true for
F2FS_IOC_FLUSH_DEVICE/F2FS_IOC_RESIZE_FS case? rather than GC_URGENT or GC_MID
case? See commit 7dede88659df ("f2fs: fix to allow migrating fully valid segment").
Thanks,
>
>>
>> Thanks,
>>
>>>
>>> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
>>> ---
>>> fs/f2fs/gc.c | 8 ++++++--
>>> 1 file changed, 6 insertions(+), 2 deletions(-)
>>>
>>> diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
>>> index d5fb426e0747..f4aa3c88118b 100644
>>> --- a/fs/f2fs/gc.c
>>> +++ b/fs/f2fs/gc.c
>>> @@ -37,7 +37,6 @@ static int gc_thread_func(void *data)
>>> unsigned int wait_ms;
>>> struct f2fs_gc_control gc_control = {
>>> .victim_segno = NULL_SEGNO,
>>> - .should_migrate_blocks = false,
>>> .err_gc_skipped = false };
>>> wait_ms = gc_th->min_sleep_time;
>>> @@ -113,7 +112,10 @@ static int gc_thread_func(void *data)
>>> sbi->gc_mode == GC_URGENT_MID) {
>>> wait_ms = gc_th->urgent_sleep_time;
>>> f2fs_down_write(&sbi->gc_lock);
>>> + gc_control.should_migrate_blocks = true;
>>> goto do_gc;
>>> + } else {
>>> + gc_control.should_migrate_blocks = false;
>>> }
>>> if (foreground) {
>>> @@ -139,7 +141,9 @@ static int gc_thread_func(void *data)
>>> if (!foreground)
>>> stat_inc_bggc_count(sbi->stat_info);
>>> - sync_mode = F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_SYNC;
>>> + sync_mode = F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_SYNC ||
>>> + sbi->gc_mode == GC_URGENT_HIGH ||
>>> + sbi->gc_mode == GC_URGENT_MID;
>>> /* foreground GC was been triggered via f2fs_balance_fs() */
>>> if (foreground)
next prev parent reply other threads:[~2022-06-22 14:02 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-17 22:31 [PATCH 1/3] f2fs: attach inline_data after setting compression Jaegeuk Kim
2022-06-17 22:31 ` [PATCH 2/3] f2fs: run GCs synchronously given user requests Jaegeuk Kim
2022-06-19 0:41 ` [f2fs-dev] " Chao Yu
2022-06-19 22:34 ` Jaegeuk Kim
2022-06-22 14:02 ` Chao Yu [this message]
2022-06-22 16:58 ` Jaegeuk Kim
2022-06-28 7:59 ` Chao Yu
2022-06-28 18:17 ` Jaegeuk Kim
2022-06-29 16:30 ` Jaegeuk Kim
2022-06-17 22:31 ` [PATCH 3/3] f2fs: do not skip updating inode when retrying to flush node page Jaegeuk Kim
2022-06-19 0:54 ` [f2fs-dev] " Chao Yu
2022-06-19 0:35 ` [f2fs-dev] [PATCH 1/3] f2fs: attach inline_data after setting compression Chao Yu
2022-06-22 14:06 ` Chao Yu
2022-06-22 16:52 ` Jaegeuk Kim
2022-06-22 16:53 ` [PATCH 1/3 v2] " Jaegeuk Kim
2022-06-28 7:46 ` [f2fs-dev] " Chao Yu
2022-06-28 7:50 ` Chao Yu
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=27138a10-a6b2-edad-1985-687a95b9039b@kernel.org \
--to=chao@kernel.org \
--cc=jaegeuk@kernel.org \
--cc=linux-f2fs-devel@lists.sourceforge.net \
--cc=linux-kernel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).