linux-kernel - Re: [PATCH v6] f2fs: add async reset zone command support

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Date:   Tue, 23 May 2023 10:43:47 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Jaegeuk Kim <jaegeuk@...nel.org>
Cc:     Daejun Park <daejun7.park@...sung.com>,
        "chao@...nel.org" <chao@...nel.org>,
        "mhiramat@...nel.org" <mhiramat@...nel.org>,
        "linux-f2fs-devel@...ts.sourceforge.net" 
        <linux-f2fs-devel@...ts.sourceforge.net>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-trace-kernel@...r.kernel.org" 
        <linux-trace-kernel@...r.kernel.org>,
        Seokhwan Kim <sukka.kim@...sung.com>,
        Yonggil Song <yonggil.song@...sung.com>,
        beomsu kim <beomsu7.kim@...sung.com>
Subject: Re: [PATCH v6] f2fs: add async reset zone command support

On Tue, 9 May 2023 11:53:35 -0700
Jaegeuk Kim <jaegeuk@...nel.org> wrote:

> On 05/08, Daejun Park wrote:
> > v5 -> v6
> > Added trace_f2fs_iostat support for zone reset command.
> > 
> > v4 -> v5
> > Added f2fs iostat for zone reset command.
> > 
> > v3 -> v4
> > Fixed build error caused by unused function.
> > 
> > v2 -> v3
> > Modified arguments to be correct for ftrace parameter.
> > Changed __submit_zone_reset_cmd to void return.
> > Refactored the f2fs_wait_discard_bio function.
> > Fixed code that was previously incorrectly merged.
> > 
> > v1 -> v2
> > Changed to apply the optional async reset write pointer by default.  
> 
> Don't add the history in the patch description.

Well, you can (and should) ...

> 
> > 
> > This patch enables submit reset zone command asynchornously. It helps
> > decrease average latency of write IOs in high utilization scenario by
> > faster checkpointing.
> > 
> > Signed-off-by: Daejun Park <daejun7.park@...sung.com>
> > ---

But it must go below the three dashes above. That will keep 'git am'
from adding it to the change log.

-- Steve


> >  fs/f2fs/f2fs.h              |  1 +
> >  fs/f2fs/iostat.c            |  1 +
> >  fs/f2fs/segment.c           | 84 +++++++++++++++++++++++++++++++++++--
> >  include/trace/events/f2fs.h | 24 +++++++++--
> >  4 files changed, 104 insertions(+), 6 deletions(-)
> > 
> > diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
> > index d211ee89c158..51b68a629814 100644
> > --- a/fs/f2fs/f2fs.h
> > +++ b/fs/f2fs/f2fs.h
> > @@ -1175,6 +1175,7 @@ enum iostat_type {
> >  	/* other */
> >  	FS_DISCARD_IO,			/* discard */
> >  	FS_FLUSH_IO,			/* flush */
> > +	FS_ZONE_RESET_IO,		/* zone reset */
> >  	NR_IO_TYPE,
> >  };
> >