netdev - Re: Major network performance regression in 3.7

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Date:	Sun, 06 Jan 2013 10:51:16 -0800
From:	Eric Dumazet <erdnetdev@...il.com>
To:	Willy Tarreau <w@....eu>
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: Major network performance regression in 3.7


> 
> (sd->len is usually 4096, which is expected, but sd->total_len value is
> huge in your case, so we always set the flag in fs/splice.c)

I am testing :

       if (sd->len < sd->total_len && pipe->nrbufs > 1)
                more |= MSG_SENDPAGE_NOTLAST;



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