From: Theodore Ts'o <tytso@mit.edu>
To: Artem Bityutskiy <dedekind1@gmail.com>
Cc: Chris Mason <clm@fb.com>,
linux-ext4@vger.kernel.org, Johannes Weiner <hannes@cmpxchg.org>,
axboe@kernel.dk, Tejun Heo <tj@kernel.org>,
linux-fsdevel@vger.kernel.org, lizefan@huawei.com,
cgroups@vger.kernel.org, adilger.kernel@dilger.ca,
kernel-team@fb.com,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 2/2] ext4: implement cgroup writeback support
Date: Wed, 23 Sep 2015 16:48:46 -0400 [thread overview]
Message-ID: <20150923204846.GI3318@thunk.org> (raw)
In-Reply-To: <CAF4G-tL9Es57dTE7bDbUdYeQxPYgKct1zn_Zbn8+S9JHMfbsng@mail.gmail.com>
On Wed, Sep 23, 2015 at 10:47:16PM +0300, Artem Bityutskiy wrote:
> And, by the way, I forgot this detail - I cut AC power off at the
> end, then put it back on after a 20 seconds delay. I mean, this is a
> clean reboot, but with power cut at the end.
Is this reproducible without the power cut? And what model SSD are
you using, and are you sure that it has Power Loss Protection (many
SSD vendors use power loss protection as the price discrimination
feature between consumer-grade SSD and enterprise-grade SSD's that
cost $$$). If this problem wasn't showing up with 4.2, and is only
failing with 4.3-rcX, then it might not be a hardware issue --- but
it's also possible that there was a timing issue which was hiding a
hardware problem. So for the purposes of debugging, removing the
power cut from the set of variables is a useful thing to do.
- Ted
next prev parent reply other threads:[~2015-09-23 20:48 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-16 22:53 [PATCHSET v2 block/for-4.2/writeback] ext4: implement cgroup writeback support Tejun Heo
2015-06-16 22:53 ` [PATCH 1/2] ext4: replace ext4_io_submit->io_op with ->io_wbc Tejun Heo
[not found] ` <1434495193-31182-2-git-send-email-tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2015-07-22 3:56 ` Theodore Ts'o
2015-06-16 22:53 ` [PATCH 2/2] ext4: implement cgroup writeback support Tejun Heo
[not found] ` <1434495193-31182-3-git-send-email-tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2015-07-22 3:56 ` Theodore Ts'o
2015-09-23 12:49 ` Artem Bityutskiy
2015-09-23 13:50 ` Artem Bityutskiy
2015-09-23 17:02 ` Theodore Ts'o
2015-09-23 17:57 ` Tejun Heo
2015-09-23 17:25 ` Chris Mason
[not found] ` <CAF4G-tKEcnVw76-ZU77AjmBDGybLnNEOKjkJtYBN67es0wb30g@mail.gmail.com>
2015-09-23 17:53 ` Chris Mason
2015-09-23 18:24 ` Theodore Ts'o
[not found] ` <CAF4G-t+E89a_A3RzQYB9wXxqE6nM0t7wN6fNmLABZ70=ivHTRQ@mail.gmail.com>
[not found] ` <CAF4G-t+E89a_A3RzQYB9wXxqE6nM0t7wN6fNmLABZ70=ivHTRQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-09-23 19:47 ` Artem Bityutskiy
2015-09-23 20:48 ` Theodore Ts'o [this message]
2015-09-24 8:13 ` Artem Bityutskiy
[not found] ` <CAF4G-tKEcnVw76-ZU77AjmBDGybLnNEOKjkJtYBN67es0wb30g-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-09-23 19:03 ` Tejun Heo
[not found] ` <1443012552.19983.209.camel-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2015-09-23 18:09 ` Tejun Heo
[not found] ` <20150923180934.GE26647-qYNAdHglDFBN0TnZuCh8vA@public.gmane.org>
2015-09-23 18:51 ` Tejun Heo
2015-09-23 21:07 ` [PATCH cgroup/for-4.3-fixes] cgroup, writeback: don't enable cgroup writeback on traditional hierarchies Tejun Heo
2015-09-24 8:09 ` Artem Bityutskiy
[not found] ` <1443082186.19983.234.camel-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2015-09-24 8:40 ` Dexuan Cui
[not found] ` <d6cf09f352a84b8d811da55fbc64a869-NHRYisGuqk8ni+flWUsx/pbBmlrREI7+ECdVDZe1NQc@public.gmane.org>
2015-09-24 20:47 ` Tejun Heo
2015-09-28 21:39 ` Tejun Heo
2015-09-24 20:45 ` Tejun Heo
2015-09-25 6:49 ` Artem Bityutskiy
[not found] ` <1443163749.19983.254.camel-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2015-09-25 10:50 ` Artem Bityutskiy
2015-09-25 15:49 ` Tejun Heo
2015-09-26 8:06 ` Artem Bityutskiy
2015-09-26 22:14 ` Tejun Heo
[not found] ` <20150926221413.GI3572-piEFEHQLUPpN0TnZuCh8vA@public.gmane.org>
2015-09-29 11:37 ` Artem Bityutskiy
2015-09-29 14:26 ` Tejun Heo
[not found] ` <20150923210729.GA23180-qYNAdHglDFBN0TnZuCh8vA@public.gmane.org>
2015-09-24 16:17 ` Jens Axboe
2015-09-24 20:48 ` Tejun Heo
2015-07-12 18:05 ` [PATCHSET v2 block/for-4.2/writeback] ext4: implement cgroup writeback support Tejun Heo
[not found] ` <20150712180520.GE18734-qYNAdHglDFBN0TnZuCh8vA@public.gmane.org>
2015-07-16 19:40 ` Tejun Heo
2015-07-16 23:21 ` Dave Chinner
2015-07-16 23:37 ` Tejun Heo
2015-07-17 1:37 ` Theodore Ts'o
2015-07-17 15:20 ` Tejun Heo
-- strict thread matches above, loose matches on Subject: below --
2015-06-12 22:02 [PATCHSET " Tejun Heo
2015-06-12 22:02 ` [PATCH 2/2] " Tejun Heo
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