diff options
| author | Tejun Heo <htejun@gmail.com> | 2007-11-27 19:28:57 +0900 |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2008-01-23 05:24:11 -0500 |
| commit | 663f99b86ac7d4c0eed8c239638da0ea8849288b (patch) | |
| tree | 413952549c288d31f5dec168e3a83fa232457093 /drivers/ata/libata-eh.c | |
| parent | 3884f7b0a8382b89d8ca5da23bd98e3e15fc805b (diff) | |
libata: adjust speed down rules
Speed down rules were too conservative. Adjust them a bit.
* More than 10 timeouts can't happen in 5 minutes as command timeout
is 30secs. Lower the limit for rule #1 to 6.
* 10 timeouts is too high for rule #3 too. Lower it to 6.
* SATAPI can benefit from falling back to PIO too. Allow SATAPI
devices to fall back to PIO.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/ata/libata-eh.c')
| -rw-r--r-- | drivers/ata/libata-eh.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c index b01ade10272..7d766ada7a5 100644 --- a/drivers/ata/libata-eh.c +++ b/drivers/ata/libata-eh.c @@ -1525,13 +1525,13 @@ static int speed_down_verdict_cb(struct ata_ering_entry *ent, void *void_arg) * Even if multiple verdicts are returned, only one action is * taken per error. ering is cleared after an action is taken. * - * 1. If more than 10 ATA_BUS, TOUT_HSM or UNK_DEV errors + * 1. If more than 6 ATA_BUS, TOUT_HSM or UNK_DEV errors * ocurred during last 5 mins, FALLBACK_TO_PIO * * 2. If more than 3 TOUT_HSM or UNK_DEV errors occurred * during last 10 mins, NCQ_OFF. * - * 3. If more than 3 ATA_BUS or TOUT_HSM errors, or more than 10 + * 3. If more than 3 ATA_BUS or TOUT_HSM errors, or more than 6 * UNK_DEV errors occurred during last 10 mins, SPEED_DOWN. * * LOCKING: @@ -1554,7 +1554,7 @@ static unsigned int ata_eh_speed_down_verdict(struct ata_device *dev) if (arg.nr_errors[ATA_ECAT_ATA_BUS] + arg.nr_errors[ATA_ECAT_TOUT_HSM] + - arg.nr_errors[ATA_ECAT_UNK_DEV] > 10) + arg.nr_errors[ATA_ECAT_UNK_DEV] > 6) verdict |= ATA_EH_SPDN_FALLBACK_TO_PIO; /* scan past 10 mins of error history */ @@ -1568,7 +1568,7 @@ static unsigned int ata_eh_speed_down_verdict(struct ata_device *dev) if (arg.nr_errors[ATA_ECAT_ATA_BUS] + arg.nr_errors[ATA_ECAT_TOUT_HSM] > 3 || - arg.nr_errors[ATA_ECAT_UNK_DEV] > 10) + arg.nr_errors[ATA_ECAT_UNK_DEV] > 6) verdict |= ATA_EH_SPDN_SPEED_DOWN; return verdict; @@ -1647,10 +1647,10 @@ static unsigned int ata_eh_speed_down(struct ata_device *dev, } /* Fall back to PIO? Slowing down to PIO is meaningless for - * SATA. Consider it only for PATA. + * SATA ATA devices. Consider it only for PATA and SATAPI. */ if ((verdict & ATA_EH_SPDN_FALLBACK_TO_PIO) && (dev->spdn_cnt >= 2) && - (link->ap->cbl != ATA_CBL_SATA) && + (link->ap->cbl != ATA_CBL_SATA || dev->class == ATA_DEV_ATAPI) && (dev->xfer_shift != ATA_SHIFT_PIO)) { if (ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO) == 0) { dev->spdn_cnt = 0; |