On 17 April 2011 18:48, Shawn Guo <shawn.guo@xxxxxxxxxxxxx> wrote: > On Mon, Apr 18, 2011 at 12:33:30AM +0800, Shawn Guo wrote: >> pre_req() runs dma_map_sg() post_req() runs dma_unmap_sg. >> If not calling pre_req() before mxs_mmc_request(), request() >> will prepare the cache just like it did it before. >> It is optional to use pre_req() and post_req(). >> >> Signed-off-by: Shawn Guo <shawn.guo@xxxxxxxxxx> >> --- >> drivers/mmc/host/mxs-mmc.c | 75 ++++++++++++++++++++++++++++++++++++++++++-- >> 1 files changed, 72 insertions(+), 3 deletions(-) >> > > Here is the result of mmc_test case 37 ~ 40, which are designed to see > the performance improvement introduced by non-blocking changes. > > Honestly, the improvement is not so impressive. Not sure if the patch > for mxs-mmc pre_req and post_req support was correctly produced. So > please help review ... My guess is that dma_unmap is not run in parallel with transfer. Please look at my patch reply. > > -- > Regards, > Shawn Regards, Per -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
