lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:	Wed, 4 Apr 2007 15:10:07 -0700
From:	Stephen Hemminger <shemminger@...ux-foundation.org>
To:	Gagan Arneja <gaagaan@...il.com>
Cc:	Michael Chan <mchan@...adcom.com>, netdev@...r.kernel.org
Subject: Re: tg3 reset_task question

On Wed, 04 Apr 2007 13:53:47 -0700
Gagan Arneja <gaagaan@...il.com> wrote:

> I like the counting semaphore idea.
> 
> --
> Gagan
> 
> Michael Chan wrote:
> > On Wed, 2007-04-04 at 13:34 -0700, Gagan Arneja wrote:
> >> Can't this BUG_ON be hit very easily:
> >>
> >> static void tg3_irq_quiesce(struct tg3 *tp)
> >> {
> >>         BUG_ON(tp->irq_sync);
> >> ...
> >> }
> >>
> >> tg3_reset_task could easily be racing with another thread, that calls
> >> tg3_full_lock(tp, 1); e.g tg3_change_mtu. Maybe I'm missing something
> >> obvious.
> >>
> > 
> > Yes, you're right.  Perhaps we should get the rtnl first before
> > tg3_full_lock(), or turn irq_sync into an atomic counter that allows
> > nesting.

When you start reinventing windows locks or the BKL, you know
you are going down the wrong path
-
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Powered by blists - more mailing lists