Re: [linux-pm] [demo patch/RFC] sleepy linux

Hi!

Is this limited to UP and only one disk?

Yes... for now.

[comments below]

Thanks!

quoted

--- /dev/null
+++ b/Documentation/power/sleepy.txt

@@ -0,0 +1,55 @@
+		Sleepy Linux
+		~~~~~~~~~~~~
+
+Copyright 2007 Pavel Machek <pavel@suse.cz>
+	  GPLv2
+
+Current Linux versions can enter suspend-to-RAM just fine, but only
+can do it on explicit request. But suspend-to-RAM is important, eating

  Usually "can only do it" AFAIK.

quoted

+something like 10% of power needed for idle system. Starting suspend
+manually is not too convinient; it is not an option on multiuser

                       convenient;

Spelling applied.

quoted

+Then, enable SCSI powersave by something like:
+
+mount /sys

Isn't /sys auto-mounted by kernel?

No.

quoted

+/* The host and its devices are all idle so we can autosuspend */
+static int autosuspend(struct Scsi_Host *host)
+{
+	if (my_pdev && autosuspend_enabled) {
+		printk("ahci: should autosuspend\n");

Use printk() KERN_* levels (multiple places).

Well, code obviously needs a lot of work... I said it was ugly ;-).

quoted

@@ -1820,6 +1858,10 @@ static void ahci_thaw(struct ata_port *a
 
 static void ahci_error_handler(struct ata_port *ap)
 {
+	struct ata_host *host = ap->host;
+	int rc;
+	extern int slept;

Eh?

Pavel in hack mode ;-). Yes, I'll clean it up once I fix the
fundamental issues -- like UP only etc... 
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html