lkml.org 
[lkml]   [2006]   [Mar]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    Date
    From
    Subject[PATCH] AHCI prefetch

    This patch has been sitting in my tmp directory for ages.

    We should probably turn this on, though the practical difference is
    probably minimal.


    diff --git a/drivers/scsi/ahci.c b/drivers/scsi/ahci.c
    index 4e96ec5..973a794 100644
    --- a/drivers/scsi/ahci.c
    +++ b/drivers/scsi/ahci.c
    @@ -64,8 +64,10 @@ enum {
    AHCI_PORT_PRIV_DMA_SZ = AHCI_CMD_SLOT_SZ + AHCI_CMD_TBL_SZ +
    AHCI_RX_FIS_SZ,
    AHCI_IRQ_ON_SG = (1 << 31),
    +
    AHCI_CMD_ATAPI = (1 << 5),
    AHCI_CMD_WRITE = (1 << 6),
    + AHCI_CMD_PREFETCH = (1 << 7),

    RX_FIS_D2H_REG = 0x40, /* offset of D2H Register FIS data */

    @@ -533,7 +535,7 @@ static void ahci_qc_prep(struct ata_queu
    if (qc->tf.flags & ATA_TFLAG_WRITE)
    opts |= AHCI_CMD_WRITE;
    if (is_atapi_taskfile(&qc->tf))
    - opts |= AHCI_CMD_ATAPI;
    + opts |= AHCI_CMD_ATAPI | AHCI_CMD_PREFETCH;

    pp->cmd_slot[0].opts = cpu_to_le32(opts);
    pp->cmd_slot[0].status = 0;
    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/
    \
     
     \ /
      Last update: 2006-03-04 18:37    [W:0.022 / U:29.408 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site