From: Paul Mackerras <paulus@samba.org>
To: Andrew Morton <akpm@osdl.org>
Cc: Matthew Grant <grantma@anathoth.gen.nz>,
dwmw2@infradead.org, linux-kernel@vger.kernel.org
Subject: Re: PROBLEM: rt_sigsuspend() does not return EINTR on 2.6.16-rc2+
Date: Mon, 6 Mar 2006 22:25:24 +1100 [thread overview]
Message-ID: <17420.7204.375377.273773@cargo.ozlabs.ibm.com> (raw)
In-Reply-To: <20060306024512.4594b58d.akpm@osdl.org>
Andrew Morton writes:
> Matthew Grant <grantma@anathoth.gen.nz> wrote:
> >
> > OK, a major piece of software is broken for mounting removable media. A
> > kernel upgrade from 2.6.15 SHOULDn't do that.
>
> Yes, this is a serious problem and we need to get to the bottom of it.
I have been looking at the equivalent code on powerpc. This looks to
me like we aren't calling do_signal on the way back out of the system
call to userspace on x86 when the _TIF_RESTORE_SIGMASK thread_info
flag is set. I had a look at the code in arch/i386/kernel and I can't
see why we wouldn't be getting to do_signal, but x86 assembly is not
my strong point.
The fact that userspace is seeing the -ERESTARTNOHAND return value
from the rt_sigsuspend strongly suggests that we aren't actually
calling do_signal, though.
Paul.
next prev parent reply other threads:[~2006-03-06 11:25 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-03-05 1:26 PROBLEM: rt_sigsuspend() does not return EINTR on 2.6.16-rc2+ Matthew Grant
2006-03-05 11:24 ` David Woodhouse
2006-03-06 8:28 ` Matthew Grant
2006-03-06 10:45 ` Andrew Morton
2006-03-06 11:25 ` Paul Mackerras [this message]
2006-03-06 11:30 ` David Woodhouse
2006-03-06 11:31 ` David Woodhouse
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