Messages in this thread | | | Date | Sat, 03 Dec 2011 23:07:30 +0530 | From | "Srivatsa S. Bhat" <> | Subject | Re: 3.2.0-rc4+ (Linus GIT af968e29acd91ebeb4224e899202c46c93171ecd) -- Freezing of tasks failed after 20.01 seconds (1 tasks refusing to freeze, wq_busy=0): |
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On 12/03/2011 10:47 PM, Miles Lane wrote:
> On Sat, Dec 3, 2011 at 11:44 AM, Srivatsa S. Bhat > <srivatsa.bhat@linux.vnet.ibm.com> wrote: >> On 12/03/2011 09:07 PM, Miles Lane wrote: >> >>> Thanks! The patch worked perfectly. >>> >>> Miles >>> >> >> >> I had written that patch when I found a possibility of freezing failure when >> looking at the code. I hadn't really hit the problem myself. (And to test my >> patch's effectiveness, I had used a synthetic scenario that I had created.) >> >> So, since you seem to have hit the problem during normal usage itself and not >> while doing anything fancy, out of curiosity, what triggered the problem? > > I was intentionally checking for problems with reading the contents of > the /sys and /proc trees. So I ran: > find /sys -name "[a-z]*" | xargs head > and > find /proc -name "[q-z]*" | xargs head > and then, while the commands were processing files I suspended > (unsuccessfully) the laptop. > > I have often found bugs in this area, so I periodically run this test. > Sometimes it turns up problems in accessing specific information in > the data files. This is the first time I added trying to suspend > while the test was running. > > Happy coding! > Miles >
Great! Thanks for telling how you triggered the problem!
Regards, Srivatsa S. Bhat
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