From: [EMAIL PROTECTED] (Linas Vepstas) Date: Wed, 16 May 2007 19:18:02 -0500
> Hi, > > On Tue, May 15, 2007 at 08:09:02PM +1000, Benjamin Herrenschmidt wrote: > > On Tue, 2007-05-15 at 17:47 +0900, Tsutomu OWA wrote: > > > I encountered the following error when doing netperf from other machine > > > to Celleb running RT kernel. PREEPT_NONE kernel works just fine as well. > > > > Hrm... sounds a bit weird. I wonder if there's a locking bug in the > > driver in the first place. > > > > Linas, what's your take ? > > Heh. I almost deleted the entire email thread cause it > didn't say "spidernet" in the subject line. :-) > Seriously, I really almost did .... > > Since this is a long email; let me put a summary up front: > I think the RT/premption patches are exposing some sort > of race in the ip header handling code. The rest of the > note is forensics pointing to this. skb->head should never ever be NULL. - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
