On Fri, 2007-10-26 at 15:41 -0500, Josh Boyer wrote: > On Fri, 26 Oct 2007 11:51:22 +1000 > Benjamin Herrenschmidt <[EMAIL PROTECTED]> wrote: > > > > > On Wed, 2007-10-24 at 18:41 -0400, Daniel Jacobowitz wrote: > > > On Wed, Oct 24, 2007 at 05:32:50PM -0500, Matt Mackall wrote: > > > > Not completely implausible, but a) why isn't this seen on basically > > > > every machine with software TLB? b) why does -local- GDB, which is > > > > presumably doing much less work than gdbserver + network stack, not > > > > fail? > > > > > > You said it yourself. Local gdb does more work -> blows through more > > > TLB entries. > > > > > > I can't answer you about the other half, but I'm pretty sure TLB > > > invalidation is already supposed to be happening... somewhere. > > > > Yes. do_wp_page() -> ptep_clear_flush() -> flush_tlb_page() > > Aren't there cases in do_wp_page that don't call ptep_clear_flush? > Seems anonymous pages, and possibly shared writeable pages skip that > step if reuse is true.
Nah, if that was broken, everybody would be in bad shape. I think I know what's up, see my other email. Cheers, Ben. _______________________________________________ Linuxppc-embedded mailing list Linuxppc-embedded@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-embedded
