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Add a comment about why contrary to what once would think running all of

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userland with total store order actually is appropriate.
This commit is contained in:
Marius Strobl 2011-09-30 20:23:18 +00:00
parent ade68e910d
commit 9a91e2aa2e
1 changed files with 4 additions and 0 deletions
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4
sys/sparc64/sparc64/machdep.c
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@ -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];