lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Wed, 9 Jan 2013 08:42:47 +0000 From: Eric Wong <normalperson@...t.net> To: Eric Dumazet <erdnetdev@...il.com> Cc: Mel Gorman <mgorman@...e.de>, linux-mm@...ck.org, netdev@...r.kernel.org, linux-kernel@...r.kernel.org, Rik van Riel <riel@...hat.com>, Minchan Kim <minchan@...nel.org>, Andrew Morton <akpm@...ux-foundation.org>, Linus Torvalds <torvalds@...ux-foundation.org> Subject: Re: ppoll() stuck on POLLIN while TCP peer is sending Eric Wong <normalperson@...t.net> wrote: > Eric Dumazet <erdnetdev@...il.com> wrote: > > On Tue, 2013-01-08 at 18:32 -0800, Eric Dumazet wrote: > > > Hmm, it seems sk_filter() can return -ENOMEM because skb has the > > > pfmemalloc() set. > > > > > > > > One TCP socket keeps retransmitting an SKB via loopback, and TCP stack > > > drops the packet again and again. > > > > sock_init_data() sets sk->sk_allocation to GFP_KERNEL > > > > Shouldnt it use (GFP_KERNEL | __GFP_NOMEMALLOC) instead ? > > Thanks, things are running good after ~35 minutes so far. > Will report back if things break (hopefully I don't run out > of laptop battery power :x). Oops, I had to restart my test :x. However, I was able to reproduce the issue very quickly again with your patch. I've double-checked I'm booting into the correct kernel, but I do have more load on this laptop host now, so maybe that made it happen more quickly... -- 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
Powered by blists - more mailing lists