Hi, Lukas No, I did a reboot after "apt-get update && apt-get upgrade". Even more, I have been reboot the server many times to troubleshooting the issue during these days.
But in Ubuntu, the kernel seems not upgrade to new version automatically within above commands, we need do it explicitly. I think it's a protection mechanism for the system core components. :-) -- Best Regards BaiYang baiy...@gmail.com http://baiy.cn **** < END OF EMAIL > **** From: Lukas Tribus Date: 2015-11-20 18:34 To: Willy Tarreau; baiyang CC: haproxy Subject: RE: CPU 100% when waiting for the client timeout >> # uname -a >> Linux WD-G0-SRP1 3.2.0-29-generic #46-Ubuntu SMP Fri Jul 27 17:03:23 UTC >> 2012 x86_64 x86_64 x86_64 GNU/Linux > > This one seems to have missed 3 years of bugfixes but anyway I don't see > how any kernel bug could make haproxy fail, and if it did we'd have to > find a workaround anyway (or a way to detect it). FYI there are 2 epoll related fixes that have been backported to the ubuntu 12.04 kernel, that the kernel above does *not* have: linux (3.2.0-64.96) precise; urgency=low * parisc: fix epoll_pwait syscall on compat kernel - LP: #1319885 http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ab3e55b119c9653b19ea4edffb86f04db867ac98 linux (3.2.0-38.59) precise-proposed; urgency=low * epoll: prevent missed events on EPOLL_CTL_MOD - LP: #1100376 http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=128dd1759d96ad36c379240f8b9463e8acfd37a1 I think the latter may be relevant? You said you did "apt-get update && apt-get upgrade", but you probably didn't reboot into the new kernel, is that correct? Regards, Lukas
