Date: Sat, 28 Jan 2012 23:18:02 +0000 (UTC) From: Marius Strobl <marius@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-8@freebsd.org Subject: svn commit: r230672 - stable/8/sys/sparc64/sparc64 Message-ID: <201201282318.q0SNI2nt003550@svn.freebsd.org>
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Author: marius Date: Sat Jan 28 23:18:02 2012 New Revision: 230672 URL: http://svn.freebsd.org/changeset/base/230672 Log: MFC: r225888 Add a comment about why contrary to what once would think running all of userland with total store order actually is appropriate. Modified: stable/8/sys/sparc64/sparc64/machdep.c Directory Properties: stable/8/sys/ (props changed) stable/8/sys/amd64/include/xen/ (props changed) stable/8/sys/cddl/contrib/opensolaris/ (props changed) stable/8/sys/contrib/dev/acpica/ (props changed) stable/8/sys/contrib/pf/ (props changed) Modified: stable/8/sys/sparc64/sparc64/machdep.c ============================================================================== --- stable/8/sys/sparc64/sparc64/machdep.c Sat Jan 28 23:17:58 2012 (r230671) +++ stable/8/sys/sparc64/sparc64/machdep.c Sat Jan 28 23:18:02 2012 (r230672) @@ -1014,6 +1014,10 @@ exec_setregs(struct thread *td, u_long e tf->tf_out[6] = sp - SPOFF - sizeof(struct frame); tf->tf_tnpc = entry + 4; tf->tf_tpc = entry; + /* + * While we could adhere to the memory model indicated in the ELF + * header, it turns out that just always using TSO performs best. + */ tf->tf_tstate = TSTATE_IE | TSTATE_PEF | TSTATE_MM_TSO; td->td_retval[0] = tf->tf_out[0];
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