Date: Fri, 21 Aug 2015 18:20:53 +0800
From: Eryu Guan <eguan@redhat.com>
To: Dave Chinner <david@fromorbit.com>
Cc: Tejun Heo <tj@kernel.org>, Jens Axboe <axboe@kernel.dk>,
        Jan Kara <jack@suse.cz>, linux-kernel@vger.kernel.org, xfs@oss.sgi.com,
        axboe@fb.com, Jan Kara <jack@suse.com>, linux-fsdevel@vger.kernel.org,
        kernel-team@fb.com
Subject: Re: [PATCH block/for-linus] writeback: fix syncing of I_DIRTY_TIME
 inodes
Message-ID: <20150821102053.GL17933@dhcp-13-216.nay.redhat.com>
References: <20150812101204.GE17933@dhcp-13-216.nay.redhat.com>
 <20150813004435.GN3902@dastard>
 <20150813224415.GG4496@mtj.duckdns.org>
 <20150814111408.GB8710@quack.suse.cz>
 <20150817200254.GG21075@mtj.duckdns.org>
 <20150818091603.GA12317@quack.suse.cz>
 <20150818174718.GA15739@mtj.duckdns.org>
 <20150818195439.GB15739@mtj.duckdns.org>
 <20150818215611.GD3902@dastard>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20150818215611.GD3902@dastard>
User-Agent: Mutt/1.5.23 (2014-03-12)
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 1055
Lines: 28

On Wed, Aug 19, 2015 at 07:56:11AM +1000, Dave Chinner wrote:
> On Tue, Aug 18, 2015 at 12:54:39PM -0700, Tejun Heo wrote:
[snip]
> 
> I'd suggest looking at some of the XFS tracepoints during the test:
> 
> tracepoint			trigger
> xfs_file_buffered_write		once per write syscall
> xfs_file_sync			once per fsync per inode
> xfs_vm_writepage		every ->writepage call
> xfs_setfilesize			every IO completion that updates inode size
> 
> And it's probably best to also include all the writeback
> tracepoints, too, for context. That will tell you what inodes and
> what part of them are getting written back and when....

I finally reproduced generic/048 with both xfs and writeback tracepoints
enabled, please download the trace dat file and trace report file from

http://128.199.137.77/writeback/

Thanks,
Eryu
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/