diff options
| author | Tejun Heo <htejun@gmail.com> | 2008-05-20 02:17:52 +0900 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@redhat.com> | 2008-07-14 15:59:32 -0400 |
| commit | 0a2c0f56159999e20015241d3b8fa89b1ab14309 (patch) | |
| tree | 2c516452d3b3f85e9a4092b6092160e123d5f5d4 /include/linux/libata.h | |
| parent | 341c2c958ec7bdd9f54733a8b0b432fe76842a82 (diff) | |
libata: improve EH retry delay handling
EH retries were delayed by 5 seconds to ensure that resets don't occur
back-to-back. However, this 5 second delay is superflous or excessive
in many cases. For example, after IDENTIFY times out, there's no
reason to wait five more seconds before retrying.
This patch adds ehc->last_reset timestamp and record the timestamp for
the last reset trial or success and uses it to space resets by
ATA_EH_RESET_COOL_DOWN which is 5 secs and removes unconditional 5 sec
sleeps.
As this change makes inter-try waits often shorter and they're
redundant in nature, this patch also removes the "retrying..."
messages.
While at it, convert explicit rounding up division to DIV_ROUND_UP().
This change speeds up EH in many cases w/o sacrificing robustness.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'include/linux/libata.h')
| -rw-r--r-- | include/linux/libata.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/libata.h b/include/linux/libata.h index 94110b652b30..9058c2a325a9 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -602,6 +602,8 @@ struct ata_eh_context { unsigned int did_probe_mask; unsigned int saved_ncq_enabled; u8 saved_xfer_mode[ATA_MAX_DEVICES]; + /* timestamp for the last reset attempt or success */ + unsigned long last_reset; }; struct ata_acpi_drive |