Re: RCU bug with v3.17-rc3 ?

Aaro Koskinen
2014-10-09T21:47:06Z

Hi,

On Thu, Oct 09, 2014 at 10:41:01PM +0200, Rabin Vincent wrote:
> What GCC version are you using?
>
> 4.8.1 and 4.8.2 are known to miscompile the ARM kernel and these
> find_get_entry() crashes with 0xffffffff involved smell a lot like the
> earlier reports from kernels build with those compilers:
>
> https://lkml.org/lkml/2014/6/25/456
> https://lkml.org/lkml/2014/6/30/375
> https://lkml.org/lkml/2014/6/30/660
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58854
> https://lkml.org/lkml/2014/5/9/330

Is it possible to blacklist those GCC versions on ARM somehow as it
seems people are still using them?

This bug also ruined a file system on one of my boxes last year
(see e.g. http://marc.info/?l=linux-arm-kernel&m=139033442527244&w=2).

A.