Date: Tue, 19 May 2015 08:20:35 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 200319] Bridge+CARP crashes/freezes Message-ID: <bug-200319-8@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=200319 Bug ID: 200319 Summary: Bridge+CARP crashes/freezes Product: Base System Version: 10.1-RELEASE Hardware: Any OS: Any Status: New Severity: Affects Many People Priority: --- Component: kern Assignee: freebsd-bugs@FreeBSD.org Reporter: eri@pfsense.org Created attachment 156928 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=156928&action=edit Fixes on carp+bridge freeze The interaction between carp and bridge code makes the OS hang. If there is a bridge with member an interface that has a CARP ip and no minimal amount of traffic flowing in the system result is a hang of the system and sometimes a crash. Reference https://redmine.pfsense.org/issues/4607 After analysis seems that the carp code uses taskqueue_swi for scheduling demotion events. The carp CIF lock had a lot of contention. ether_input was doing duplicate checks of bridge_input causing even more contention on the CIF lock. Attached patch converts CIF lock to RW lock. It avoids duplicate checks from ether_input in case of bridge schedules the taskqueue as taskqueue_thread rather than a SWI thread. -- You are receiving this mail because: You are the assignee for the bug.
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