From: Steven Rostedt <rostedt@goodmis.org>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Damien Le Moal <damien.lemoal@opensource.wdc.com>,
Byungchul Park <byungchul.park@lge.com>,
linux-ide@vger.kernel.org, Ingo Molnar <mingo@redhat.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Will Deacon <will@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Joel Fernandes <joel@joelfernandes.org>,
Sasha Levin <sashal@kernel.org>,
Daniel Vetter <daniel.vetter@ffwll.ch>,
Chris Wilson <chris@chris-wilson.co.uk>,
duyuyang@gmail.com, johannes.berg@intel.com,
Tejun Heo <tj@kernel.org>, "Theodore Ts'o" <tytso@mit.edu>,
Matthew Wilcox <willy@infradead.org>,
Dave Chinner <david@fromorbit.com>,
Amir Goldstein <amir73il@gmail.com>,
"J. Bruce Fields" <bfields@fieldses.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
kernel-team@lge.com, Linux-MM <linux-mm@kvack.org>,
Andrew Morton <akpm@linux-foundation.org>,
Michal Hocko <mhocko@kernel.org>,
Minchan Kim <minchan@kernel.org>,
Johannes Weiner <hannes@cmpxchg.org>,
Vladimir Davydov <vdavydov.dev@gmail.com>,
sj@kernel.org, Jerome Glisse <jglisse@redhat.com>,
Dennis Zhou <dennis@kernel.org>, Christoph Lameter <cl@linux.com>,
Pekka Enberg <penberg@kernel.org>,
David Rientjes <rientjes@google.com>,
Vlastimil Babka <vbabka@suse.cz>,
ngupta@vflare.org, linux-block <linux-block@vger.kernel.org>,
Jens Axboe <axboe@kernel.dk>,
paolo.valente@linaro.org, Josef Bacik <josef@toxicpanda.com>,
linux-fsdevel <linux-fsdevel@vger.kernel.org>,
Al Viro <viro@zeniv.linux.org.uk>, Jan Kara <jack@suse.cz>,
Jeff Layton <jlayton@kernel.org>,
Dan Williams <dan.j.williams@intel.com>,
Christoph Hellwig <hch@infradead.org>,
"Darrick J. Wong" <djwong@kernel.org>,
dri-devel <dri-devel@lists.freedesktop.org>,
Dave Airlie <airlied@linux.ie>,
rodrigosiqueiramelo@gmail.com, melissa.srw@gmail.com,
hamohammed.sa@gmail.com
Subject: Re: Report in ata_scsi_port_error_handler()
Date: Wed, 16 Feb 2022 13:33:18 -0500 [thread overview]
Message-ID: <20220216133318.204f36ac@gandalf.local.home> (raw)
In-Reply-To: <CAHk-=wgfpfWuNQi2SjXQL1ir6iKCpUdBruJ+kmOQP1frH7Zdig@mail.gmail.com>
On Wed, 16 Feb 2022 10:09:14 -0800
Linus Torvalds <torvalds@linux-foundation.org> wrote:
> Byungchul, could you fix those two issues? Some of your reports may
> well be entirely valid, but the hard-to-read hex offsets and the
> knowledge that at least some of them are confused about how
> prepare_to_wait -> wait actually works makes the motivation to look at
> the details much less..
Hi Byungchul,
I'm not sure what your tool is using to attach to the kernel to analyze the
events (perhaps tracepoints?). But you can have the prepare_to_wait event
just flag the task is about to wait, and then attach to the schedule
(sched_switch) event to denote that it actually waited.
Of course have the finish_wait() clear the flag.
-- Steve
next prev parent reply other threads:[~2022-02-16 18:33 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-16 4:12 [REPORT] libata deadlock possibilities by DEPT Byungchul Park
2022-02-16 4:16 ` Report 2 in ata_scsi_port_error_handler() Byungchul Park
2022-02-16 4:16 ` Report 3 " Byungchul Park
2022-02-16 4:16 ` Report " Byungchul Park
2022-02-16 6:37 ` Damien Le Moal
2022-02-16 18:09 ` Linus Torvalds
2022-02-16 18:33 ` Steven Rostedt [this message]
2022-02-17 23:55 ` Byungchul Park
2022-02-17 10:35 ` Byungchul Park
2022-02-16 6:52 ` [REPORT] libata deadlock possibilities by DEPT Byungchul Park
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=20220216133318.204f36ac@gandalf.local.home \
--to=rostedt@goodmis.org \
--cc=airlied@linux.ie \
--cc=akpm@linux-foundation.org \
--cc=amir73il@gmail.com \
--cc=axboe@kernel.dk \
--cc=bfields@fieldses.org \
--cc=byungchul.park@lge.com \
--cc=chris@chris-wilson.co.uk \
--cc=cl@linux.com \
--cc=damien.lemoal@opensource.wdc.com \
--cc=dan.j.williams@intel.com \
--cc=daniel.vetter@ffwll.ch \
--cc=david@fromorbit.com \
--cc=dennis@kernel.org \
--cc=djwong@kernel.org \
--cc=dri-devel@lists.freedesktop.org \
--cc=duyuyang@gmail.com \
--cc=gregkh@linuxfoundation.org \
--cc=hamohammed.sa@gmail.com \
--cc=hannes@cmpxchg.org \
--cc=hch@infradead.org \
--cc=jack@suse.cz \
--cc=jglisse@redhat.com \
--cc=jlayton@kernel.org \
--cc=joel@joelfernandes.org \
--cc=johannes.berg@intel.com \
--cc=josef@toxicpanda.com \
--cc=kernel-team@lge.com \
--cc=linux-block@vger.kernel.org \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-ide@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=melissa.srw@gmail.com \
--cc=mhocko@kernel.org \
--cc=minchan@kernel.org \
--cc=mingo@redhat.com \
--cc=ngupta@vflare.org \
--cc=paolo.valente@linaro.org \
--cc=penberg@kernel.org \
--cc=peterz@infradead.org \
--cc=rientjes@google.com \
--cc=rodrigosiqueiramelo@gmail.com \
--cc=sashal@kernel.org \
--cc=sj@kernel.org \
--cc=tglx@linutronix.de \
--cc=tj@kernel.org \
--cc=torvalds@linux-foundation.org \
--cc=tytso@mit.edu \
--cc=vbabka@suse.cz \
--cc=vdavydov.dev@gmail.com \
--cc=viro@zeniv.linux.org.uk \
--cc=will@kernel.org \
--cc=willy@infradead.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).