From: Greg KH <gregkh@linuxfoundation.org>
To: Boaz Harrosh <bharrosh@panasas.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
"Rafael J. Wysocki" <rjw@sisk.pl>,
keyrings@linux-nfs.org, linux-security-module@vger.kernel.org,
linux-fsdevel <linux-fsdevel@vger.kernel.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
NFS list <linux-nfs@vger.kernel.org>,
Trond Myklebust <Trond.Myklebust@netapp.com>,
"Bhamare, Sachin" <sbhamare@panasas.com>,
David Howells <dhowells@redhat.com>,
Eric Paris <eparis@redhat.com>,
"Srivatsa S. Bhat" <srivatsa.bhat@linux.vnet.ibm.com>,
Kay Sievers <kay.sievers@vrfy.org>,
James Morris <jmorris@namei.org>,
"Eric W. Biederman" <ebiederm@xmission.com>,
Greg Kroah-Hartman <gregkh@suse.de>
Subject: Re: [PATCHSET 0/4] kmod: Optional timeout on the wait in call_usermodehelper_exec
Date: Wed, 21 Mar 2012 08:35:19 -0700 [thread overview]
Message-ID: <20120321153519.GB30250@kroah.com> (raw)
In-Reply-To: <4F691059.30405@panasas.com>
On Tue, Mar 20, 2012 at 04:18:49PM -0700, Boaz Harrosh wrote:
> Andrew Hi
>
> I'm picking on you because I don't have any one else to pick on.
> The 3 first patches here, are just good for today. Please see if
> you would like to take them? or tell me who should take them?
>
> The 4th patch is an RFC, which got me looking into this.
>
> My motivation is that I added yet another Kernel dependency on the
> call_usermodehelper() function and am not completely happy with the
> error case of having the user-mode program stuck forever. In such
> case I would like the Kernel part to timeout and properly error recover
> and clean up. So therefor the proposed 4th patch.
What is this new use of call_usermodhelper that you are doing this work
for? Ideally, you never want to make this call, as it's slow and messy,
as you have found out. Is there an in-kernel user that you have
recently added?
thanks,
greg k-h
next prev parent reply other threads:[~2012-03-21 15:35 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-20 23:18 Boaz Harrosh
2012-03-20 23:23 ` [PATCH 1/4] kmod: Un-export call_usermodehelper_freeinfo() Boaz Harrosh
2012-03-20 23:26 ` [PATCH 2/4] kmod: Convert two call sites to call_usermodehelper_fns() Boaz Harrosh
2012-03-22 3:00 ` James Morris
2012-03-20 23:28 ` [PATCH 3/4] kmod: Move call_usermodehelper_fns() to .c file and unexport it's helpers Boaz Harrosh
2012-03-20 23:32 ` [RFC 4/4] {RFC} kmod.c: Add new call_usermodehelper_timeout() API Boaz Harrosh
2012-03-22 2:44 ` Boaz Harrosh
2012-03-22 2:48 ` Boaz Harrosh
2012-03-22 2:52 ` Boaz Harrosh
[not found] ` <201203241028.IGJ09825.MtOVFHFJQSLOFO@I-love.SAKURA.ne.jp>
[not found] ` <4F6D35F0.2020808@panasas.com>
[not found] ` <20120323200028.fadf49f8.akpm@linux-foundation.org>
[not found] ` <20120324145308.GA10023@redhat.com>
[not found] ` <201205191121.BIF57837.FHFOtMOLJQSOFV@I-love.SAKURA.ne.jp>
[not found] ` <4FB7170F.7070807@panasas.com>
2012-05-21 17:01 ` call_usermodehelper && check_hung_uninterruptible_tasks Oleg Nesterov
2012-05-21 18:24 ` Oleg Nesterov
[not found] ` <87fwau4aag.fsf@rustcorp.com.au>
2012-05-21 17:34 ` UMH_WAIT_EXEC->UMH_WAIT_PROC deadlock Oleg Nesterov
2012-05-21 18:12 ` Oleg Nesterov
2012-03-22 11:48 ` [RFC 4/4] {RFC} kmod.c: Add new call_usermodehelper_timeout()API Tetsuo Handa
2012-03-22 14:27 ` [RFC 4/4] {RFC} kmod.c: Add new call_usermodehelper_timeout() API Oleg Nesterov
2012-03-22 14:42 ` Oleg Nesterov
2012-03-22 19:08 ` Boaz Harrosh
2012-03-22 22:16 ` [RFC 4/4] {RFC} kmod.c: Add new call_usermodehelper_timeout()API Tetsuo Handa
2012-03-23 4:48 ` Boaz Harrosh
2012-03-23 5:23 ` Tetsuo Handa
2012-03-23 16:30 ` Oleg Nesterov
2012-03-23 13:34 ` [RFC 4/4] {RFC} kmod.c: Add new call_usermodehelper_timeout() API Oleg Nesterov
2012-03-21 15:35 ` Greg KH [this message]
2012-03-22 0:18 ` [PATCHSET 0/4] kmod: Optional timeout on the wait in call_usermodehelper_exec Boaz Harrosh
2012-03-22 0:31 ` Myklebust, Trond
2012-03-22 1:18 ` Boaz Harrosh
2012-03-27 1:57 ` [PATCHSET 0/6 version 2] " Boaz Harrosh
2012-03-27 2:00 ` [PATCH 1/6] kmod: Unexport call_usermodehelper_freeinfo() Boaz Harrosh
2012-03-27 2:02 ` [PATCH 2/6] kmod: Convert two call sites to call_usermodehelper_fns() Boaz Harrosh
2012-03-27 2:04 ` [PATCH 3/6] kmod: Move call_usermodehelper_fns() to .c file and unexport all it's helpers Boaz Harrosh
2012-03-27 2:06 ` [PATCH 4/6 OPTION-A] completion: Add new wait_for_completion_timeout_state Boaz Harrosh
2012-03-27 2:33 ` [PATCH 4/6 OPTION-A version 3] " Boaz Harrosh
2012-03-27 8:11 ` Peter Zijlstra
2012-03-28 18:19 ` Boaz Harrosh
2012-03-28 18:25 ` Peter Zijlstra
2012-03-28 17:38 ` Oleg Nesterov
2012-03-27 2:09 ` [PATCH 4/6 option-B] kmod: add new wait_for_completion_timeout_state() helper Boaz Harrosh
2012-03-27 2:13 ` [PATCH 5/6] kmod: Add new call_usermodehelper_timeout() API Boaz Harrosh
2012-03-27 15:43 ` Oleg Nesterov
2012-03-28 17:04 ` Oleg Nesterov
2012-03-27 2:15 ` [PATCH 6/6] kmod: optional: Convert the use of xchg to a kref Boaz Harrosh
2012-03-28 16:35 ` Oleg Nesterov
2012-03-27 21:07 ` [PATCHSET 0/6 version 2] kmod: Optional timeout on the wait in call_usermodehelper_exec Andrew Morton
2012-03-28 20:19 ` Oleg Nesterov
2012-03-28 21:42 ` Boaz Harrosh
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