Messages in this thread | | | Date | Sat, 18 Oct 2014 12:45:25 +0200 | From | "Steinar H. Gunderson" <> | Subject | Re: getaddrinfo slowdown in 3.17.1, due to getifaddrs |
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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/
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