Date: Wed, 7 Aug 2013 10:07:56 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-releng@freebsd.org Subject: svn commit: r254054 - releng/9.2/sys/kern Message-ID: <201308071007.r77A7uXC042938@svn.freebsd.org>
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Author: kib Date: Wed Aug 7 10:07:55 2013 New Revision: 254054 URL: http://svnweb.freebsd.org/changeset/base/254054 Log: Revert the MFC of the r244237, done as r244806. There are indeed bugs in XEN pmap. The revert hides a panic with the cost of non-working vfork(2), which means more obscure misbehaviour in the usermode. Revert is only done on the stable branch to maintain the consistent erratic behaviour. PR: kern/180788 Approved by: re (marius) Modified: releng/9.2/sys/kern/kern_fork.c Directory Properties: releng/9.2/sys/ (props changed) Modified: releng/9.2/sys/kern/kern_fork.c ============================================================================== --- releng/9.2/sys/kern/kern_fork.c Wed Aug 7 09:18:21 2013 (r254053) +++ releng/9.2/sys/kern/kern_fork.c Wed Aug 7 10:07:55 2013 (r254054) @@ -150,7 +150,11 @@ sys_vfork(struct thread *td, struct vfor int error, flags; struct proc *p2; +#ifdef XEN + flags = RFFDG | RFPROC; /* validate that this is still an issue */ +#else flags = RFFDG | RFPROC | RFPPWAIT | RFMEM; +#endif error = fork1(td, flags, 0, &p2, NULL, 0); if (error == 0) { td->td_retval[0] = p2->p_pid;
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