On Friday, 15 June 2007 15:08, Uli Luckas wrote:
> On Monday, 4. June 2007, Rafael J. Wysocki wrote:
> > From: Rafael J. Wysocki <[email protected]>
> >
> > Use a hibernation and suspend notifier to disable the user mode helper
> > before a hibernation/suspend and enable it after the operation.
> >
> Hi Rafael,
> I have a couple of questions, regarding this patch ...
> > - if (!khelper_wq)
> > + if (!khelper_wq || usermodehelper_disabled)
> > return -EBUSY;
> 1) how about not returning -EBUSY here, if (wait == UMH_NO_WAIT)?
Yes, this would make sense.
> 2) how does your patch prevent wait_for_completion(&done) to hang during
> freezing if usermodehelper_pm_callback is called _after_ the above check?
It doesn't. Once the helper is running, we can't distinguish it from any other
user land process.
Still, it narrows the window quite a bit.
Greetings,
Rafael
--
"Premature optimization is the root of all evil." - Donald Knuth
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]