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Date: Thu, 01 May 2014 10:46:30 -0700 From: Eric Dumazet <eric.dumazet@...il.com> To: Sander Eikelenboom <linux@...elenboom.it> Cc: Zoltan Kiss <zoltan.kiss@...rix.com>, Ian Campbell <Ian.Campbell@...rix.com>, "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org, xen-devel@...ts.xen.org Subject: Re: [3.15-rc3] Bisected: xen-netback mangles packets between two guests on a bridge since merge of "TX grant mapping with SKBTX_DEV_ZEROCOPY instead of copy" series. On Thu, 2014-05-01 at 19:39 +0200, Sander Eikelenboom wrote: > Will run that for both the cases: > skb->truesize -= skb->data_len; > skb->truesize -= nskb->data_len; > > Let's see what that does different and if that gives an insight in what is going > wrong. Playing with skb->truesize only makes TCP stack reacts faster to bloat, calling tcp collapse to save memory. So you might prevent the bug from happening, not really fix root cause. -- 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
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