Date: Tue, 4 Mar 2014 21:51:09 +0000 (UTC) From: Ed Maste <emaste@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org Subject: svn commit: r262753 - stable/10/sys/amd64/amd64 Message-ID: <201403042151.s24Lp9n1029391@svn.freebsd.org>
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Author: emaste Date: Tue Mar 4 21:51:09 2014 New Revision: 262753 URL: http://svnweb.freebsd.org/changeset/base/262753 Log: Disable amd64 TLB Context ID (pcid) by default for now There are a number of reports of userspace application crashes that are "solved" by setting vm.pmap.pcid_enabled=0, including Java and the x11/mate-terminal port (PR ports/184362). For now apply a band-aid of disabling pcid by default in stable/10. Sponsored by: The FreeBSD Foundation Modified: stable/10/sys/amd64/amd64/pmap.c Modified: stable/10/sys/amd64/amd64/pmap.c ============================================================================== --- stable/10/sys/amd64/amd64/pmap.c Tue Mar 4 21:35:57 2014 (r262752) +++ stable/10/sys/amd64/amd64/pmap.c Tue Mar 4 21:51:09 2014 (r262753) @@ -367,7 +367,7 @@ static int pmap_flags = PMAP_PDE_SUPERPA static struct unrhdr pcid_unr; static struct mtx pcid_mtx; -int pmap_pcid_enabled = 1; +int pmap_pcid_enabled = 0; SYSCTL_INT(_vm_pmap, OID_AUTO, pcid_enabled, CTLFLAG_RDTUN, &pmap_pcid_enabled, 0, "Is TLB Context ID enabled ?"); int invpcid_works = 0;
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