On Wed, Mar 12, 2014 at 03:31:57PM +0100, Thomas Karmann wrote: > Hi, > > I patched out the lock instruction via hexedit and the segfaults are gone! > > before: > > => 507b: f0 0f b1 8b 94 21 00 lock cmpxchg %ecx,0x2194(%ebx) > > after: > > 507b: 90 nop > 507c: 0f b1 8b 94 21 00 00 cmpxchg %ecx,0x2194(%ebx) >
While it shows that the problem is at the CPU level, it's not really a fix, as the bus is not locked anymore, so it might results in issues in multithreaded solution. The correct solution would be to apply the solution from Intel, that is adding a nop before every instruction with the lock prefix. This means rebuilding the code. -- Aurelien Jarno GPG: 1024D/F1BCDB73 [email protected] http://www.aurel32.net -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected] Archive: https://lists.debian.org/[email protected]
