From 9a91e2aa2eb7abb5150d37ca9890d84f2edabe16 Mon Sep 17 00:00:00 2001 From: Marius Strobl Date: Fri, 30 Sep 2011 20:23:18 +0000 Subject: [PATCH] Add a comment about why contrary to what once would think running all of userland with total store order actually is appropriate. --- sys/sparc64/sparc64/machdep.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/sys/sparc64/sparc64/machdep.c b/sys/sparc64/sparc64/machdep.c index c6252cdbf86..27204482287 100644 --- a/sys/sparc64/sparc64/machdep.c +++ b/sys/sparc64/sparc64/machdep.c @@ -1015,6 +1015,10 @@ exec_setregs(struct thread *td, struct image_params *imgp, u_long stack) tf->tf_out[6] = sp - SPOFF - sizeof(struct frame); tf->tf_tnpc = imgp->entry_addr + 4; tf->tf_tpc = imgp->entry_addr; + /* + * 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];