From: Srivatsa Vaddagiri <vatsa@in.ibm.com>
To: Andrew Morton <akpm@osdl.org>
Cc: linux-kernel@vger.kernel.org, Rusty Russell <rusty@rustcorp.com.au>
Subject: Re: [PATCH] call_usermodehelper needs to wait longer
Date: Wed, 10 Mar 2004 13:54:17 +0530 [thread overview]
Message-ID: <20040310082416.GA5084@in.ibm.com> (raw)
In-Reply-To: <20040309133835.2343565c.akpm@osdl.org>
On Tue, Mar 09, 2004 at 01:38:35PM -0800, Andrew Morton wrote:
> I'm not so sure about this. There are deadlock potentials if the usermode
> application wants to perform some function which requires keventd services
> to complete - the application cannot complete because keventd is itself
> waiting for the application.
>
> Can we think of any circumstances under which keventd _should_
> synchronously wait for the userspace app?
Honestly I don't know ..Would it be reasonable for somebody
to call request_module from a work function (in which case the above
bug is exposed)? I agree it is not a nice thing if we block keventd
waiting for the app to exit.
>
> btw: your patch had whitespace where the tabs should be (email client
> problem), and `patch -p1' format is (much) preferred.
Sorry abt that! The whitespace was because of cut-n-paste ..I have
also downloaded your patch scripts and will start using that for
generating patches henceforth!
--
Thanks and Regards,
Srivatsa Vaddagiri,
Linux Technology Center,
IBM Software Labs,
Bangalore, INDIA - 560017
next prev parent reply other threads:[~2004-03-10 8:23 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-03-09 13:51 [PATCH] call_usermodehelper needs to wait longer Srivatsa Vaddagiri
2004-03-09 21:38 ` Andrew Morton
2004-03-10 8:24 ` Srivatsa Vaddagiri [this message]
2004-03-10 10:47 ` Rusty Russell
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