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Date: Fri, 25 Sep 2015 20:45:58 -0700 From: Guenter Roeck <linux@...ck-us.net> To: Herbert Xu <herbert@...dor.apana.org.au> Cc: Steven Schlansker <stevenschlansker@...il.com>, linux-kernel@...r.kernel.org, Eric Dumazet <edumazet@...gle.com>, netdev@...r.kernel.org Subject: Re: Glibc recvmsg from kernel netlink socket hangs forever Herbert, On 09/25/2015 08:55 AM, Herbert Xu wrote: > On Thu, Sep 24, 2015 at 10:34:10PM -0700, Guenter Roeck wrote: >> >> Any idea what may be needed for 4.1 ? >> I am currently trying https://patchwork.ozlabs.org/patch/473041/, > > This patch should not make any difference on 4.1 and later because > 4.1 is where I rewrote rhashtable resizing and it should work (or > if it is broken then the latest kernel should be broken too). > >> but I have no idea if that will help with the problem we are seeing there. > > Having looked at your message agin I don't think the issue I > alluded to is relevant since the symptom there ought to be a > straight kernel lock-up as opposed to just a user-space one because > you will end up with the kernel sending a message to itself. > > And the fact that 4.2 works is more indicative as the bug is > present in both 4.1 and 4.2. > > I'll try to reproduce this in 4.1 as time permits but no promises. > After applying your two patches, I don't see the problem in 4.1 anymore. We'll run the system through regression; the complete cycle may take a couple of weeks. I'll let you know if we find any further problems. If you submit additional patches in that area, it would be great if you can Cc: me. Thanks, Guenter -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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