On Fri, Sep 11, 2015 at 6:12 PM, Sedat Dilek <sedat.di...@gmail.com> wrote: > On Thu, Sep 10, 2015 at 4:53 PM, Tejun Heo <t...@kernel.org> wrote: >> On Thu, Sep 10, 2015 at 10:52:27AM -0400, Tejun Heo wrote: >>> Hey, >>> >>> On Thu, Sep 10, 2015 at 09:04:27AM +0800, Lai Jiangshan wrote: >>> > I think we need to add might_sleep() on the top of __cancel_work_timer(). >>> > The might_sleep() on the start_flush_work() doesn't cover all the >>> > paths of __cancel_work_timer(). >>> > And it can help to narrow the area of this bug. >>> >>> Sure, can you submit a patch? >> >> That said, this one is likely not a bug in the kernel code but more >> likely llvm either miscompiling or deviating from gcc behavior on some >> corner cases. >> > > An llvmlinux-patched Linux v4.2 kernel compiled with GCC v4.9 does not > show this BUG line. >
This bug seems to be more serious as I thought. On my llvmlinux-patched Linux v4.2 my Xorg crashes reproducibly when marking a text in Firefox with my Logitech mouse. My LightDM login-manager restarts and I have to re-login. With a GCC v4.9 compiled Linux v4.2 this does not happen - the bug-line does not occur. My mouse (USB 2.0) is attached to a USB 3.0 plug on my notebook. If this matters... - Sedat - -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
