From: Andi Kleen <ak@suse.de>
To: Chuck Ebbert <cebbert@redhat.com>
Cc: linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: 2.6.23: x86_64 oops caused by hotplug running before vdso initialized
Date: Thu, 6 Dec 2007 21:51:55 +0100 [thread overview]
Message-ID: <200712062151.55480.ak@suse.de> (raw)
In-Reply-To: <4758512E.1060306@redhat.com>
On Thursday 06 December 2007 20:44:46 Chuck Ebbert wrote:
> pages is NULL here, implying vma->vm_private_data was NULL. This is apparently
> because init_vdso_vars() is __initcall and runs after the rootfs gets populated.
> An experimental initrd containing an /sbin/hotplug binary caused this. Normally
> we don't have that file in the initrd. Should vdso init be done earlier to prevent
> this problem?
We've often had bugs like this. Sure it could be fixed here, but then
the next bug would crop up again later I bet.
It would be better to move the first user space code execution later I think.
I guess the hotplug events could be delayed or initrd just mounted later.
Running any user space before __initcall() has finished is just wrong.
-Andi
next prev parent reply other threads:[~2007-12-06 20:52 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-12-06 19:44 2.6.23: x86_64 oops caused by hotplug running before vdso initialized Chuck Ebbert
2007-12-06 20:51 ` Andi Kleen [this message]
2007-12-06 21:10 ` Chuck Ebbert
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=200712062151.55480.ak@suse.de \
--to=ak@suse.de \
--cc=cebbert@redhat.com \
--cc=linux-kernel@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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.