linux-kernel - RE: [git patches] net driver updates

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 linux-cve-announce 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:	Thu, 21 Feb 2008 11:32:08 +0530
From:	Krishna Kumar2 <krkumar2@...ibm.com>
To:	"Divy Le Ray" <divy@...lsio.com>
Cc:	"David Miller" <davem@...emloft.net>, jeff@...zik.org,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: RE: [git patches] net driver updates

Hi Divy,

But the race doesn't exist even for LLTX drivers these days. There is no
way two cpu's can execute the xmit handler at the same time.

Thanks,

- KK

> > > > The first part of the patch removes the !netif_queue_stopped(dev).
> > > > It opens the race discussed a while ago between Stephen hemminger
> > and
> > > > David Miller:
> > > > http://marc.info/?l=linux-netdev&m=113383224512427&w=2
> > >
> > > I feel this race cannot happen anymore. I think the fix for that
> race
> > was
> > > to introduce the
> > > __LINK_STATE_QDISC_RUNNING bit thus eliminating any races between
> > CPU's. If
> > > one
> > > CPU has called xmit, the other CPU will enqueue skbs (by holding the
> > > queue_lock) and
> > > exit from qdisc_run since it finds the bit set already.
> >
> > And the race is talking about LLTX, which S2IO doesn't use as
> > far as I can tell.
>
> Dave,
>
> The driver is cxgb3 here, it uses LLTX.
>
> Cheers,
> Divy

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/