linux-kernel - Re: sk_lock: inconsistent {RECLAIM_FS-ON-W} -> {IN-RECLAIM

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Message-ID: <20090710005957.GA32555@gondor.apana.org.au>
Date:	Fri, 10 Jul 2009 08:59:57 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	David Miller <davem@...emloft.net>
Cc:	fengguang.wu@...el.com, linux-kernel@...r.kernel.org,
	linux-nfs@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: sk_lock: inconsistent {RECLAIM_FS-ON-W} -> {IN-RECLAIM_FS-W}
	usage

On Thu, Jul 09, 2009 at 05:13:55PM -0700, David Miller wrote:
>
> I think this specific case needs more thinking.
> 
> If the allocation fails, and it's GFP_ATOMIC, we are going to yield()
> (which sleeps) and loop endlessly waiting for the allocation to
> succeed.

Indeed.  We could do one of the following:

1) Preallocate, either universally or conditinally on sk_allocation.
2) Set a bit somewhere to indicate FIN and retry the allocation as
part of retransmit.

Cheers,
-- 
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Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
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