>> # 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
