Messages in this thread | | | From | "Rafael J. Wysocki" <> | Subject | Re: [PATCH] swsusp: Disable nonboot CPUs before entering platform suspend | Date | Thu, 8 Mar 2007 00:14:10 +0100 |
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On Wednesday, 7 March 2007 23:19, Pavel Machek wrote: > Hi! > > > > > Prevent the WARN_ON() in arch/x86_64/kernel/acpi/sleep.c:init_low_mapping() > > > > from triggering by disabling nonboot CPUs before we finally enter the platform > > > > suspend. > > > > > > > > Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> > > > > --- > > > > kernel/power/disk.c | 1 + > > > > kernel/power/user.c | 2 +- > > > > 2 files changed, 2 insertions(+), 1 deletion(-) > > > > > > > > Index: linux-2.6.21-rc2-mm2/kernel/power/disk.c > > > > =================================================================== > > > > --- linux-2.6.21-rc2-mm2.orig/kernel/power/disk.c > > > > +++ linux-2.6.21-rc2-mm2/kernel/power/disk.c > > > > @@ -61,6 +61,7 @@ static void power_down(suspend_disk_meth > > > > switch(mode) { > > > > case PM_DISK_PLATFORM: > > > > if (pm_ops && pm_ops->enter) { > > > > + disable_nonboot_cpus(); > > > > kernel_shutdown_prepare(SYSTEM_SUSPEND_DISK); > > > > pm_ops->enter(PM_SUSPEND_DISK); > > > > break; > > > > Index: linux-2.6.21-rc2-mm2/kernel/power/user.c > > > > =================================================================== > > > > --- linux-2.6.21-rc2-mm2.orig/kernel/power/user.c > > > > +++ linux-2.6.21-rc2-mm2/kernel/power/user.c > > > > @@ -398,9 +398,9 @@ static int snapshot_ioctl(struct inode * > > > > > > > > case PMOPS_ENTER: > > > > if (data->platform_suspend) { > > > > + disable_nonboot_cpus(); > > > > kernel_shutdown_prepare(SYSTEM_SUSPEND_DISK); > > > > error = pm_ops->enter(PM_SUSPEND_DISK); > > > > - error = 0; > > > > } > > > > break; > > > > > > Is this considered 2.6.21 material? If so why? > > > > Well, the WARN_ON() in arch/x86_64/kernel/acpi/sleep.c:init_low_mapping() > > triggers every time an SMP x86_64 box is suspended to disk using the platform > > mode (default), which is quite annoying IMHO and users think something wrong is > > going on. This will probably cause them to report the problem and I'd rather > > like to avoid handling these reports. ;-) > > I do not quite like the patch (explanation in separate mail). Can we > remove the WARN_ON() ? ;-).
Yes, if you can tell me why it's there. :-)
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