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    DateWed, 28 Mar 2007 00:29:19 +0200
    FromAdrian Bunk <>
    SubjectRe: [4/5] 2.6.21-rc5: known regressions
    On Tue, Mar 27, 2007 at 12:09:13PM +0200, Rafael J. Wysocki wrote:
    > On Tuesday, 27 March 2007 03:59, Adrian Bunk 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.
    > 
    > I think the following two:
    > 
    > > Subject    : suspend to disk: keypress required for power down
    > > References : http://lkml.org/lkml/2007/3/25/78
    > > Submitter  : Thomas Meyer <thomas@m3y3r.de>
    > > Status     : unknown
    > 
    > > Subject    : suspend to disk: non-boot cpus are disabled again
    > > References : http://lkml.org/lkml/2007/3/25/78
    > > Submitter  : Thomas Meyer <thomas@m3y3r.de>
    > > Handled-By : Rafael J. Wysocki <rjw@sisk.pl>
    > >              Eric W. Biederman <ebiederm@xmission.com>
    > > Status     : problem is being debugged
    > 
    > are related to the same issue.
    > 
    > The problem is that we call disable_nonboot_cpus() in swsusp before
    > powering down the system in order to avoid triggering the WARN_ON()
    > in arch/x86_64/kernel/acpi/sleep.c:init_low_mapping() and this doesn't
    > work well on Thomas' system.
    > 
    > Since the problem has been introduced by commit
    > 94985134b7b46848267ed6b734320db01c974e72
    > (swsusp: disable nonboot CPUs before entering platform suspend), I think it's
    > better to revert this commit and remove the the WARN_ON() in
    > arch/x86_64/kernel/acpi/sleep.c:init_low_mapping() (appended is a patch that
    > removes the WARN_ON()).
    
    It's now in Linus' tree.
    
    Thomas (Meyer), are there any regressions left with the latest -git tree 
    plus the MSI fix?
    
    > Greetings,
    > Rafael
    >...
    
    cu
    Adrian
    
    -- 
    
           "Is there not promise of rain?" Ling Tan asked suddenly out
            of the darkness. There had been need of rain for many days.
           "Only a promise," Lao Er said.
                                           Pearl S. Buck - Dragon Seed
    
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