From: James Bottomley <James.Bottomley@HansenPartnership.com>
To: dgilbert@interlog.com
Cc: vaughan <vaughan.cao@oracle.com>, Madper Xie <cxie@redhat.com>,
linux-kernel@vger.kernel.org,
SCSI development list <linux-scsi@vger.kernel.org>
Subject: Re: [Bug] 12.864681 BUG: lock held when returning to user space!
Date: Wed, 16 Oct 2013 14:24:57 +0100 [thread overview]
Message-ID: <1381929897.1864.0.camel@dabdike> (raw)
In-Reply-To: <52540C7F.8050207@interlog.com>
On Tue, 2013-10-08 at 09:45 -0400, Douglas Gilbert wrote:
> On 13-10-08 02:44 AM, vaughan wrote:
> > Hi Madper,
> >
> > CC to Douglas to get comments.
> > I use the rw_semaphore o_sem to protect excl open, introduced in commit
> > 15b06f9a02406e5460001db6d5af5c738cd3d4e7 since v3.12-rc1.
> > Is it forbidden to do like that in kernel?...
>
> It appears you can not (allow sg_open() to hold a semaphore
> then return to the user space). So you will need to do some
> rework on that patch or revert it.
OK, there being no reply on this, I'll do the revert ... that's all four
patches, correct?
James
next prev parent reply other threads:[~2013-10-16 13:24 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <8761tilrl0.fsf@redhat.com>
[not found] ` <874n8s2tjz.fsf@redhat.com>
[not found] ` <5253A9E7.5030707@oracle.com>
2013-10-08 13:45 ` [Bug] 12.864681 BUG: lock held when returning to user space! Douglas Gilbert
2013-10-16 13:24 ` James Bottomley [this message]
2013-10-16 22:41 ` Douglas Gilbert
2013-10-17 2:52 ` vaughan
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=1381929897.1864.0.camel@dabdike \
--to=james.bottomley@hansenpartnership.com \
--cc=cxie@redhat.com \
--cc=dgilbert@interlog.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-scsi@vger.kernel.org \
--cc=vaughan.cao@oracle.com \
/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;
as well as URLs for NNTP newsgroup(s).