Package: kernel-patch-scsi-idle
Severity: wishlist
Tags: patch
Please include this patch for kernel 2.6. This should apply for
kernels 2.6.12--2.6.15 at least.
This patch is from the nslu2-linux project.
Thanks,
Marcus
-- System Information:
Debian Release: testing/unstable
APT prefers testing
APT policy: (990, 'testing'), (500, 'unstable'), (500, 'stable'), (1,
'experimental')
Architecture: i386 (i686)
Shell: /bin/sh linked to /bin/bash
Kernel: Linux 2.6.15-1-686
Locale: LANG=sv_SE.UTF-8, LC_CTYPE=sv_SE.UTF-8 (charmap=UTF-8)
===File ~/scsi-idle.patch===================================
diff -ur linux-2.6.12.2/drivers/scsi/sd.c
linux-2.6.12.2_scsi-idle/drivers/scsi/sd.c
--- linux-2.6.12.2/drivers/scsi/sd.c 2005-08-27 06:12:31.000000000 +0200
+++ linux-2.6.12.2_scsi-idle/drivers/scsi/sd.c 2005-08-27 06:26:50.000000000
+0200
@@ -266,6 +266,9 @@
"count=%d\n", disk->disk_name,
(unsigned long long)block, this_count));
+ /* Update idle-since time */
+ sdp->idle = jiffies;
+
if (!sdp || !scsi_device_online(sdp) ||
block + rq->nr_sectors > get_capacity(disk)) {
SCSI_LOG_HLQUEUE(2, printk("Finishing %ld sectors\n",
@@ -600,6 +603,8 @@
case SCSI_IOCTL_GET_IDLUN:
case SCSI_IOCTL_GET_BUS_NUMBER:
return scsi_ioctl(sdp, cmd, p);
+ case SCSI_IOCTL_IDLE:
+ return (jiffies - sdp->idle) / HZ + 1;
default:
error = scsi_cmd_ioctl(filp, disk, cmd, p);
if (error != -ENOTTY)
diff -ur linux-2.6.12.2/include/scsi/scsi_device.h
linux-2.6.12.2_scsi-idle/include/scsi/scsi_device.h
--- linux-2.6.12.2/include/scsi/scsi_device.h 2005-08-27 06:12:44.000000000
+0200
+++ linux-2.6.12.2_scsi-idle/include/scsi/scsi_device.h 2005-08-27
06:27:09.000000000 +0200
@@ -125,6 +125,7 @@
atomic_t ioerr_cnt;
int timeout;
+ unsigned long idle; /* scsi idle time in jiffers */
struct device sdev_gendev;
struct class_device sdev_classdev;
diff -ur linux-2.6.12.2/include/scsi/scsi_ioctl.h
linux-2.6.12.2_scsi-idle/include/scsi/scsi_ioctl.h
--- linux-2.6.12.2/include/scsi/scsi_ioctl.h 2005-08-27 06:12:44.000000000
+0200
+++ linux-2.6.12.2_scsi-idle/include/scsi/scsi_ioctl.h 2005-08-28
17:32:17.000000000 +0200
@@ -7,6 +7,7 @@
#define SCSI_IOCTL_SYNC 4 /* Request synchronous
parameters */
#define SCSI_IOCTL_START_UNIT 5
#define SCSI_IOCTL_STOP_UNIT 6
+#define SCSI_IOCTL_IDLE 4746 /* get idle time in jiffies */
/* The door lock/unlock constants are compatible with Sun constants for
the cdrom */
#define SCSI_IOCTL_DOORLOCK 0x5380 /* lock the eject mechanism */
============================================================
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