From: Max Krasnyanskiy <maxk@qualcomm.com>
To: Andi Kleen <andi@firstfloor.org>
Cc: Tejun Heo <htejun@gmail.com>,
rusty@rustcorp.com.au, Andrew Morton <akpm@linux-foundation.org>,
LKML <linux-kernel@vger.kernel.org>,
Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: Module loading/unloading and "The Stop Machine"
Date: Fri, 22 Feb 2008 14:41:53 -0800 [thread overview]
Message-ID: <47BF4FB1.80205@qualcomm.com> (raw)
In-Reply-To: <p73prup8awh.fsf@bingen.suse.de>
Hi Andi,
> Max Krasnyanskiy <maxk@qualcomm.com> writes:
>> static struct module *load_module(void __user *umod,
>> unsigned long len,
>> const char __user *uargs)
>> {
>> ...
>>
>> /* Now sew it into the lists so we can get lockdep and oops
>> * info during argument parsing. Noone should access us, since
>> * strong_try_module_get() will fail. */
>> stop_machine_run(__link_module, mod, NR_CPUS);
>> ...
>> }
>
> Wow you found some really bad code. I bet it wouldn't be that
> difficult to fix the code to allow oops safe list insertion
> without using the big stop machine overkill hammer.
Let me know if you have something in mind. When I get a chance I'll stare
some more at that code and try to come up with an alternative solution.
Thanx
Max
next prev parent reply other threads:[~2008-02-22 22:42 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-02-08 2:38 Module loading/unloading and "The Stop Machine" Max Krasnyansky
2008-02-08 23:11 ` Max Krasnyanskiy
2008-02-14 4:02 ` Tejun Heo
2008-02-22 1:24 ` Max Krasnyanskiy
2008-02-22 1:38 ` Tejun Heo
2008-02-22 1:47 ` Max Krasnyanskiy
2008-02-22 1:59 ` Tejun Heo
2008-02-22 2:16 ` Max Krasnyanskiy
2008-02-22 11:53 ` Andi Kleen
2008-02-22 22:41 ` Max Krasnyanskiy [this message]
2008-03-04 1:21 ` Rusty Russell
2008-02-14 5:02 ` Jike Song
2008-02-14 5:38 ` Tejun Heo
2008-03-04 3:51 ` Rusty Russell
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=47BF4FB1.80205@qualcomm.com \
--to=maxk@qualcomm.com \
--cc=akpm@linux-foundation.org \
--cc=andi@firstfloor.org \
--cc=htejun@gmail.com \
--cc=linux-kernel@vger.kernel.org \
--cc=rusty@rustcorp.com.au \
--cc=torvalds@linux-foundation.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