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-   -   PM: Make warning in suspend_test_finish() less likely to happen (http://www.linux-archive.org/ubuntu-kernel-team/271884-pm-make-warning-suspend_test_finish-less-likely-happen.html)

Leann Ogasawara 10-30-2009 02:34 PM

PM: Make warning in suspend_test_finish() less likely to happen
 
On Fri, 2009-10-30 at 14:41 +0000, Stefan Bader wrote:
> As this is one the most unnecessary warnings we got around and apparently
> has been annoying upstream too, plus the change is least likely to cause
> any regression.

We're also seeing a huge flood of bug reports due to this warning.
Hopefully this patch will cut down the noise.

Acked-by: Leann Ogasawara <leann.ogasawara@canonical.com>

> Andy Whitcroft wrote:
> > From: Rafael J. Wysocki <rjw@sisk.pl>
> >
> > Bug-Link: http://bugs.launchpad.net/bugs/464552
> >
> > Increase TEST_SUSPEND_SECONDS to 10 so the warning in
> > suspend_test_finish() doesn't annoy the users of slower systems so much.
> >
> > Also, make the warning print the suspend-resume cycle time, so that we
> > know why the warning actually triggered.
> >
> > Patch prepared during the hacking session at the Kernel Summit in Tokyo.
> >
> > Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
> > Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
> > (cherry picked from commit 04bf7539c08d64184736cdc5e4ad617eda77eb0f)
> >
> > Signed-off-by: Andy Whitcroft <apw@canonical.com>
>
> Acked-by: Stefan Bader <stefan.bader@canonical.com>
>
> > ---
> > kernel/power/suspend_test.c | 5 +++--
> > 1 files changed, 3 insertions(+), 2 deletions(-)
> >
> > diff --git a/kernel/power/suspend_test.c b/kernel/power/suspend_test.c
> > index 17d8bb1..25596e4 100644
> > --- a/kernel/power/suspend_test.c
> > +++ b/kernel/power/suspend_test.c
> > @@ -19,7 +19,7 @@
> > * The time it takes is system-specific though, so when we test this
> > * during system bootup we allow a LOT of time.
> > */
> > -#define TEST_SUSPEND_SECONDS 5
> > +#define TEST_SUSPEND_SECONDS 10
> >
> > static unsigned long suspend_test_start_time;
> >
> > @@ -49,7 +49,8 @@ void suspend_test_finish(const char *label)
> > * has some performance issues. The stack dump of a WARN_ON
> > * is more likely to get the right attention than a printk...
> > */
> > - WARN(msec > (TEST_SUSPEND_SECONDS * 1000), "Component: %s
", label);
> > + WARN(msec > (TEST_SUSPEND_SECONDS * 1000),
> > + "Component: %s, time: %u
", label, msec);
> > }
> >
> > /*
>
>



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