Re: cpufreq + PREEMPT_RT_FULL give bad context sleeping BUG

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



* Thomas Gleixner | 2013-03-26 22:07:45 [+0100]:

>> that means it should trigger on mainline as well.
>
>No. It won't. Mainline uses a spinlock which gets converted to a
>sleeping spinlock on rt.
>
>  (rt_spin_lock+0x30/0x64) from (clk_get_rate+0x30/0x54)

This is true but this spinlock in only available in the OOT code
Gregoire Gentil pointed out ([0]). In mainline we have a mutex in
drivers/clk/clk.c and this is what my omap4 blaze is using.

[0] http://dev.omapzoom.org/?p=integration/kernel-ubuntu.git;a=blob;f=arch/arm/plat-omap/clock.c;h=8c0e8fe2c5c51673e41e4304194d922dbfaedf38;hb=3e1c9f139425663ceee48f92e8d3f23158580334

>Thanks,
>
>	tglx

Sebastian
--
To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html




[Index of Archives]     [RT Stable]     [Kernel Newbies]     [IDE]     [Security]     [Git]     [Netfilter]     [Bugtraq]     [Yosemite]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Linux ATA RAID]     [Samba]     [Video 4 Linux]     [Device Mapper]

  Powered by Linux