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Open Source and information security mailing list archives
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Date: Sat, 18 Oct 2014 12:45:25 +0200 From: "Steinar H. Gunderson" <sgunderson@...foot.com> To: linux-kernel@...r.kernel.org Cc: Thomas Graf <tgraf@...g.ch>, "David S. Miller" <davem@...emloft.net>, Nikolay Aleksandrov <nikolay@...hat.com> Subject: Re: getaddrinfo slowdown in 3.17.1, due to getifaddrs On Fri, Oct 17, 2014 at 02:34:30AM +0200, Steinar H. Gunderson wrote: > e341694e3eb57fcda9f1adc7bfea42fe080d8d7a looks like it might cause something > like this (it certainly added the synchronize_net() call). Cc-ing people on > that commit; quoting the entire rest of the message for reference. I see there's discussion on what to do with this; thanks. :-) FWIW, I've verified that reverting these four patches (in that order) fixes the problem: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/patch/net/netlink/af_netlink.c?id=9ce12eb16ffb143f3a509da86283ddd0b10bcdb3 https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/patch/net/netlink/af_netlink.c?id=6c8f7e70837468da4e658080d4448930fb597e1b https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/patch/net/netlink/af_netlink.c?id=67a24ac18b0262178ba9f05501b2c6e6731d449a https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/patch/net/netlink/af_netlink.c?id=e341694e3eb57fcda9f1adc7bfea42fe080d8d7a My Perl script is seemingly not the only affected program on the system; witness the average page load times for our PHP-based home page: http://home.samfundet.no/~sesse/web_load_time_samfundet_no-week.png /* Steinar */ -- Homepage: http://www.sesse.net/ -- 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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