On Sun, Nov 16, 2014 at 4:44 AM, Xin LI <delp...@freebsd.org> wrote: > Author: delphij > Date: Sun Nov 16 09:44:30 2014 > New Revision: 274583 > URL: https://svnweb.freebsd.org/changeset/base/274583 > > Log: > Default to use 10 seconds as nap interval instead of 1. > > Previously, we have a nap interval of 1 second while we have a timeout of > 128 seconds by default, which could be an overkill, and for some hardware > the patting action may be expensive. > > Note that the choice of nap interval is still arbitrary. We preferred > a safe value where even when the system is very heavily loaded, the > watchdog should not shoot the system down if it's not really hung. > According to the manual page of Linux's watchdog daemon, the nap interval > time of theirs is 10 seconds, which seems to be a reasonable value -- > according to Intel documentation AP-725 (Document Number: 292273-001), > ICH5's maximum timeout is about 37.5 seconds, which the ichwd(4) driver > would set when we requested 128 seconds (although it should probably > feed back this as an error and do not set the timeout). Since that's > the shortest maximum value, 10 seconds seems to be a right choice for > us too. > > Discussed with: alfred > MFC after: 1 month >
relnotes: yes? -Ben _______________________________________________ svn-src-all@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
