netdev - Re: [Bug 14470] New: freez in TCP stack

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Message-Id: <20091202.151007.202653587.davem@davemloft.net>
Date:	Wed, 02 Dec 2009 15:10:07 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	ilpo.jarvinen@...sinki.fi
Cc:	eric.dumazet@...il.com, akpm@...ux-foundation.org,
	shemminger@...ux-foundation.org, netdev@...r.kernel.org,
	kolo@...atani.cz, bugzilla-daemon@...zilla.kernel.org
Subject: Re: [Bug 14470] New: freez in TCP stack

From: "Ilpo J.$(D+#.(Brvinen" <ilpo.jarvinen@...sinki.fi>
Date: Thu, 26 Nov 2009 23:54:53 +0200 (EET)

> [PATCH] tcp: clear hints to avoid a stale one (nfs only affected?)
> 
> Eric Dumazet mentioned in a context of another problem:
> 
> "Well, it seems NFS reuses its socket, so maybe we miss some
> cleaning as spotted in this old patch"
> 
> I've not check under which conditions that actually happens but
> if true, we need to make sure we don't accidently leave stale
> hints behind when the write queue had to be purged (whether reusing
> with NFS can actually happen if purging took place is something I'm
> not sure of).
> 
> ...At least it compiles.
> 
> Signed-off-by: Ilpo J.$(D+#.(Brvinen <ilpo.jarvinen@...sinki.fi>

I think this is a good safety net even if it doesn't specifically
fix a specific problem.

But I'd like to see this patch tested by the person seeing the
problem so we can know whether that is fixed or not.
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