Messages in this thread | | | Date | Wed, 9 Oct 2013 14:52:28 +0200 | From | Ingo Molnar <> | Subject | Re: [x86] BUG: unable to handle kernel paging request at 00740060 |
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* Peter Zijlstra <peterz@infradead.org> wrote:
> On Wed, Oct 09, 2013 at 08:19:11PM +0800, Fengguang Wu wrote: > > > > Fengguang, I do not think this will help, but just in case. Could you > > > > show the result of > > > > > > > > $ kernel/task_work.s > > > > Update: I recompiled the kernel with gcc 4.4.7 and find it booting fine! > > > # 208 "/c/wfg/tip/arch/x86/include/asm/bitops.h" 1 > > bts $1, 8(%eax); setc %dl #,, c > > That compiler doesn't appear to have asm goto support, so we fall back > to the code we already knew worked :-)
I'm using 4.7.2 with randconfig testing, which has asm goto support, and I haven't seen this crash yet.
Unless my testing is off it might be a bug in GCC 4.8, or a pre-existing bug gets exposed by GCC 4.8.
Thanks,
Ingo
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