On Sun, Sep 07, 2014 at 09:08:31AM +0100, Chris Wilson wrote: > Running igt, I was encountering the invalid TLB bug on my 845g, despite > that it was using the CS workaround. Examining the w/a buffer in the > error state, showed that the copy from the user batch into the > workaround itself was suffering from the invalid TLB bug (the first > cacheline was broken with the first two words reversed). Time to try a > fresh approach. This extends the workaround to write into each page of > our scratch buffer in order to overflow the TLB and evict the invalid > entries. This could be refined to only do so after we update the GTT, > but for simplicity, we do it before each batch. This seems to hold up under scruting, so far at least. So I am more convinced that this effectively does the right thing. -Chris -- Chris Wilson, Intel Open Source Technology Centre _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
