From: Wolfgang Muees <wolfgang.mues@xxxxxxxxxxxx> This patch is setting some max_ variables for the IO elevator, so the elevator will put requests for large data blocks to the driver. This is critical for a) speed and b) wear leveling of the flash chip controller: Otherwise the controller will treat the SD card badly with millions of single 4 KByte write commands. This will lead to a shorter life time for the SD cards. Signed-off-by: Wolfgang Muees <wolfgang.mues@xxxxxxxxxxxx> Signed-off-by: Nicolas Ferre <nicolas.ferre@xxxxxxxxx> Cc: Andrew Victor <avictor.za@xxxxxxxxx> Cc: <linux-mmc@xxxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- drivers/mmc/host/at91_mci.c | 3 +++ 1 file changed, 3 insertions(+) diff -puN drivers/mmc/host/at91_mci.c~mmc-at91_mci-enable-large-data-blocks drivers/mmc/host/at91_mci.c --- a/drivers/mmc/host/at91_mci.c~mmc-at91_mci-enable-large-data-blocks +++ a/drivers/mmc/host/at91_mci.c @@ -934,6 +934,9 @@ static int __init at91_mci_probe(struct mmc->max_blk_size = MCI_MAXBLKSIZE; mmc->max_blk_count = MCI_BLKATONCE; mmc->max_req_size = MCI_BUFSIZE; + mmc->max_phys_segs = MCI_BLKATONCE; + mmc->max_hw_segs = MCI_BLKATONCE; + mmc->max_seg_size = MCI_BUFSIZE; host = mmc_priv(mmc); host->mmc = mmc; _ -- 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
