linux-fsdevel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: "Jan Lübbe" <jlu@pengutronix.de>
To: John Ogness <john.ogness@linutronix.de>
Cc: Andrew Morton <akpm@linux-foundation.org>,
	Alexey Dobriyan <adobriyan@gmail.com>,
	Andy Lutomirski <luto@kernel.org>,
	kernel@pengutronix.de, linux-kernel@vger.kernel.org,
	linux-fsdevel@vger.kernel.org, stable@vger.kernel.org
Subject: Re: [PATCHv3] fs/proc: allow reporting eip/esp for all coredumping threads
Date: Mon, 03 Jun 2019 21:54:08 +0200	[thread overview]
Message-ID: <1559591648.29720.5.camel@pengutronix.de> (raw)
In-Reply-To: <87pno0u59o.fsf_-_@linutronix.de>

On Thu, 2019-05-30 at 02:58 +0200, John Ogness wrote:
> Commit 0a1eb2d474ed ("fs/proc: Stop reporting eip and esp in
> /proc/PID/stat") stopped reporting eip/esp and commit fd7d56270b52
> ("fs/proc: Report eip/esp in /prod/PID/stat for coredumping")
> reintroduced the feature to fix a regression with userspace core dump
> handlers (such as minicoredumper).
> 
> Because PF_DUMPCORE is only set for the primary thread, this didn't fix
> the original problem for secondary threads. Allow reporting the eip/esp
> for all threads by checking for PF_EXITING as well. This is set for all
> the other threads when they are killed. coredump_wait() waits for all
> the tasks to become inactive before proceeding to invoke a core dumper.
> 
> Fixes: fd7d56270b526ca3 ("fs/proc: Report eip/esp in /prod/PID/stat for coredumping")
> Reported-by: Jan Luebbe <jlu@pengutronix.de>
> Signed-off-by: John Ogness <john.ogness@linutronix.de>

Tested-by: Jan Luebbe <jlu@pengutronix.de>

I've tested your patch and can confirm that eip/esp is accessible for
all threads again.

Thanks,
Jan
-- 
Pengutronix e.K.                           |                             |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |

      parent reply	other threads:[~2019-06-03 19:54 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-22 16:16 [PATCH] proc: report eip and esp for all threads when coredumping Jan Luebbe
2019-05-22 17:13 ` Alexey Dobriyan
2019-05-22 18:00 ` Andrew Morton
2019-05-23  8:15   ` Jan Lübbe
2019-05-24 23:50 ` John Ogness
     [not found]   ` <20190525143220.e771b7915d17f22dad1438fa@linux-foundation.org>
2019-05-26 19:41     ` John Ogness
2019-05-29  8:55       ` [PATCHv2] fs/proc: allow reporting eip/esp for all coredumping threads John Ogness
2019-05-29 21:55         ` Andrew Morton
2019-05-30  0:58         ` [PATCHv3] " John Ogness
2019-05-30  1:14           ` Andrew Morton
2019-06-03 19:54           ` Jan Lübbe [this message]

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=1559591648.29720.5.camel@pengutronix.de \
    --to=jlu@pengutronix.de \
    --cc=adobriyan@gmail.com \
    --cc=akpm@linux-foundation.org \
    --cc=john.ogness@linutronix.de \
    --cc=kernel@pengutronix.de \
    --cc=linux-fsdevel@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=luto@kernel.org \
    --cc=stable@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).