From: Martin Wilck <martin.wilck@fujitsu-siemens.com>
To: Arjan van de Ven <arjan@infradead.org>
Cc: Alexander Nyberg <alexn@telia.com>, linux-kernel@vger.kernel.org
Subject: Re: files_lock deadlock?
Date: Fri, 12 Aug 2005 08:41:19 +0200 [thread overview]
Message-ID: <42FC448F.6070702@fujitsu-siemens.com> (raw)
In-Reply-To: <1123782699.3201.43.camel@laptopd505.fenrus.org>
Arjan van de Ven wrote:
> I disagree, it's a performance cost.
> It's a lot easier to make remove_proc_entry() a might_sleep().. (I'm
> surprised it isn't already btw given that it's vfs related and the vfs
> is mostly semaphore based)
Well enough. But to my understanding using spin_lock implies that we can
_prove_ the lock won't be taken in softirq context, and that we will be
able to prevent new such paths to be introduced in the future. I wonder
if that's possible for this lock.
Regards,
Martin
--
Martin Wilck Phone: +49 5251 8 15113
Fujitsu Siemens Computers Fax: +49 5251 8 20409
Heinz-Nixdorf-Ring 1 mailto:Martin.Wilck@Fujitsu-Siemens.com
D-33106 Paderborn http://www.fujitsu-siemens.com/primergy
next prev parent reply other threads:[~2005-08-12 6:41 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-07-19 16:45 files_lock deadlock? Martin Wilck
2005-07-19 17:48 ` Jan Engelhardt
2005-07-20 14:32 ` Martin Wilck
2005-07-20 14:47 ` Alexander Nyberg
2005-07-20 15:02 ` Martin Wilck
2005-08-11 17:45 ` Martin Wilck
2005-08-11 17:51 ` Arjan van de Ven
2005-08-12 6:41 ` Martin Wilck [this message]
2005-08-12 7:07 ` Arjan van de Ven
2005-08-12 8:42 ` Martin Wilck
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=42FC448F.6070702@fujitsu-siemens.com \
--to=martin.wilck@fujitsu-siemens.com \
--cc=alexn@telia.com \
--cc=arjan@infradead.org \
--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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox