[PATCH] fix TSC clocksource bug

Tim Gardner tcanonical at tpi.com
Wed Apr 23 20:16:17 UTC 2008

Alok Kataria wrote:
> Hi Tim,
> I was curious whether Ubuntu will be taking this fix in its Hardy
> release.
> This new fix for TSC issue was yesterday merged in the X86 git tree. It
> works well to keep TSC's synced and at the same time keeps Software
> Suspend happy too.
> Thanks,
> Alok
> On Sat, 2008-04-12 at 13:50 -0700, Dan Hecht wrote:
>> On 04/11/2008 03:51 PM, William Grant wrote:
>>> Tim Gardner wrote:
>>>> [snip]
>>>> =20
>>>> OK - reverted.
>>> Hm, can we please have another fix, then? The current workaround (adding
>>> `clocksource=3Dhpet' to the kernel line) is simple, but it looks rather
>>> bad to by default have pause of more than 30 seconds on boot, all the
>>> while making an annoying beeping noise...
>>> --=20
>>> William Grant
>> There is a new patch available that resolves the software suspend issue 
>> introduced with the earlier patch.  Please see 
>> http://bugzilla.kernel.org/show_bug.cgi?id=10410.
>> I agree that it would be great to get this patch into Hardy as soon as 
>> possible since the TSC clocksource bug can result in hangs and 
>> timekeeping/timers not working properly.
>> Dan

The cherry-pick from upstream didn't work so well. Do you suppose you 
could backport it to Hardy and submit a patch? Thanks.

Tim Gardner tim.gardner at ubuntu.com

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