On 6/17/15 11:07 PM, Konstantin Belousov wrote: > On Thu, Jun 18, 2015 at 02:04:21AM +0000, Sean Bruno wrote: >> Author: sbruno >> Date: Thu Jun 18 02:04:20 2015 >> New Revision: 284535 >> URL: https://svnweb.freebsd.org/changeset/base/284535 >> >> Log: >> This change replaces the mutex with a sx lock for the interpreter list to >> avoid the problem of holding a non-sleep lock during a page fault as >> reported by witness. It also uses atomics where possible to avoid having >> to acquire the exclusive lock. In addition, it consistently uses >> memset()/memcpy() instead of bzero()/bcopy(). >> >> Differential Revision: https://reviews.freebsd.org/D1971 >> Submitted by: sson >> Reviewed by: jhb > What are the page faults during image activator run ? > Or, if the page faults are not during image activation, then where ?
It took me a while to figure out while reviewing, but the exec_map memory is pageable, so the bcopy to move things around inside of it can fault. -- John Baldwin _______________________________________________ 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"
