Re: [3/3] 2.6.21-rc7: known regressions (v2)

[Rafael J. Wysocki]

On Wednesday, 25 April 2007 13:06, Andrew Morton wrote:
> On Mon, 23 Apr 2007 23:49:09 +0200 Adrian Bunk <bunk@xxxxxxxxx> wrote:
> 
> > This email lists some known regressions in Linus' tree compared to 2.6.20.
> > 
> > If you find your name in the Cc header, you are either submitter of one
> > of the bugs, maintainer of an affectected subsystem or driver, a patch
> > of you caused a breakage or I'm considering you in any other way
> > possibly involved with one or more of these issues.
> > 
> > Due to the huge amount of recipients, please trim the Cc when answering.
> > 
> > 
> > Subject    : HPET enabled freeze my machine at boot
> >              workaround: clocksource=acpi_pm
> > References : http://lkml.org/lkml/2007/4/19/370
> > Submitter  : Guilherme Schroeder <guilherme@xxxxxxxxxxxxxxxxx>
> > Caused-By  : Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> >              commit 5d8b34fdcb384161552d01ee8f34af5ff11f9684
> > Handled-By : John Stultz <johnstul@xxxxxxxxxx>
> > Status     : problem is being debugged
> > 
> > 
> > Subject    : acpi_pm clocksource loses time on x86-64
> > References : http://lkml.org/lkml/2007/4/17/143
> > Submitter  : Mikael Pettersson <mikpe@xxxxxxxx>
> > Handled-By : John Stultz <johnstul@xxxxxxxxxx>
> > Status     : problem is being debugged
> > 
> > 
> > Subject    : suspend to disk hangs  (CONFIG_NO_HZ)
> > References : http://lkml.org/lkml/2007/3/25/217
> > Submitter  : Jeff Chua <jeff.chua.linux@xxxxxxxxx>
> > Status     : unknown
> 
> That's still rather a lot of bustage from the timekeeping changes.  Is
> anything really happening here or have we all given up?
> 
> > 
> > Subject    : ThinkPad X60: resume no longer works  (PCI related?)
> >              workaround: CONFIG_FB_BACKLIGHT=n
> > References : http://lkml.org/lkml/2007/3/13/3
> > Submitter  : Dave Jones <davej@xxxxxxxxxx>
> > Caused-By  : PCI merge
> >              commit 78149df6d565c36675463352d0bfe0000b02b7a7
> > Handled-By : Eric W. Biederman <ebiederm@xxxxxxxxxxxx>
> >              Rafael J. Wysocki <rjw@xxxxxxx>
> >              Antonino A. Daplas <adaplas@xxxxxxxxx>
> > Status     : unknown
> > 
> 
> Is this related to the problems Jeremy has been looking at?
> 
> > Subject    : suspend to disk works only once
> >              workaround: "echo shutdown > /sys/power/disk"
> > References : http://lkml.org/lkml/2007/4/13/240
> > Submitter  : Tobias Diedrich <ranma+kernel@xxxxxxxxxxxx>
> > Caused-By  : Rafael J. Wysocki <rjw@xxxxxxx>
> >              commit ed746e3b18f4df18afa3763155972c5835f284c5
> > Handled-By : Rafael J. Wysocki <rjw@xxxxxxx>
> >              Dmitry Torokhov <dtor@xxxxxxxxxxxxx>
> > Status     : problem is being debugged
> 
> That's been happening on my Vaio-of-death for several weeks now.  I spent a
> bit of time with the ACPI guys on it but we didn't get far.  I need to
> find an hour or two to work out what's gone wrong.

I can't reproduce it on any of my machines ...

Does the appended patch help, BTW?


---
 kernel/power/disk.c |    4 ++--
 kernel/power/user.c |    8 ++++----
 2 files changed, 6 insertions(+), 6 deletions(-)

Index: linux-2.6.21-rc7/kernel/power/disk.c
===================================================================
--- linux-2.6.21-rc7.orig/kernel/power/disk.c
+++ linux-2.6.21-rc7/kernel/power/disk.c
@@ -170,9 +170,9 @@ int pm_suspend_disk(void)
 
 	if (in_suspend) {
 		enable_nonboot_cpus();
-		platform_finish();
 		device_resume();
 		resume_console();
+		platform_finish();
 		pr_debug("PM: writing image.\n");
 		error = swsusp_write();
 		if (!error)
@@ -189,9 +189,9 @@ int pm_suspend_disk(void)
  Enable_cpus:
 	enable_nonboot_cpus();
  Resume_devices:
-	platform_finish();
 	device_resume();
 	resume_console();
+	platform_finish();
  Thaw:
 	unprepare_processes();
  Finish:
Index: linux-2.6.21-rc7/kernel/power/user.c
===================================================================
--- linux-2.6.21-rc7.orig/kernel/power/user.c
+++ linux-2.6.21-rc7/kernel/power/user.c
@@ -170,11 +170,11 @@ static inline int snapshot_suspend(int p
 	}
 	enable_nonboot_cpus();
  Resume_devices:
+	device_resume();
+	resume_console();
 	if (platform_suspend)
 		platform_finish();
 
-	device_resume();
-	resume_console();
  Finish:
 	mutex_unlock(&pm_mutex);
 	return error;
@@ -202,11 +202,11 @@ static inline int snapshot_restore(int p
 
 	enable_nonboot_cpus();
  Resume_devices:
+	device_resume();
+	resume_console();
 	if (platform_suspend)
 		platform_finish();
 
-	device_resume();
-	resume_console();
  Finish:
 	pm_restore_console();
 	mutex_unlock(&pm_mutex);
-
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