>>>>> On Mon, 19 Sep 2005 17:40:56 +0200, Thiemo Seufer <ths@xxxxxxxxxxxx> said: ths> I found an performance bug in c-r4k.c:r4k_dma_cache_inv, where a ths> Hit_Writeback_Inv instead of Hit_Invalidate is done. Ralf ths> mentioned this is probably due to broken Hit_Invalidate cache ops ths> on some CPUs, does anybody have more information about this? The ths> appended patch works apparently fine on R4400, R4600v2.0, R5000. Just a question: Are there any performance advantage of using Hit_Invalidate instead of Hit_Writeback_Inv if the target line was CLEAN? --- Atsushi Nemoto
