On 10/29/2015 15:25, Tijl Coosemans wrote: > On Wed, 14 Oct 2015 02:10:07 +0000 (UTC) Jeff Roberson <j...@freebsd.org> > wrote: >> Author: jeff >> Date: Wed Oct 14 02:10:07 2015 >> New Revision: 289279 >> URL: https://svnweb.freebsd.org/changeset/base/289279 >> >> Log: >> Parallelize the buffer cache and rewrite getnewbuf(). This results in a >> 8x performance improvement in a micro benchmark on a 4 socket machine. >> >> - Get buffer headers from a per-cpu uma cache that sits in from of the >> free queue. >> - Use a per-cpu quantum cache in vmem to eliminate contention for kva. >> - Use multiple clean queues according to buffer cache size to eliminate >> clean queue lock contention. >> - Introduce a bufspace daemon that attempts to prevent getnewbuf() callers >> from blocking or doing direct recycling. >> - Close some bufspace allocation races that could lead to endless >> recycling. >> - Further the transition to a more modern style of small functions grouped >> by prefix in order to improve growing complexity. > > I have an i386 system that locks up easily after this commit. Booting > into single user and running make installkernel triggers it consistently.
I can't help you debug this, but I noticed a follow-up commit that fixed an uninitialized pointer introduced by this commit: https://svnweb.freebsd.org/changeset/base/290155 Pending comments from more enlightened folk, you might try updating to that rev (if you can do so without a lockup...). Eric _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"