On Tue, Sep 22, 2009 at 11:49 AM, Siarhei Liakh <sliakh.lkml@xxxxxxxxx> wrote: >> Hi Siarhei, >> I tried out this patch on 2.6.31, and got the following trace during bootup.. >> >> ------------[ cut here ]------------ >> WARNING: at kernel/trace/ftrace.c:1003 ftrace_bug+0x198/0x27e() (Not tainted) >> Hardware name: VGN-Z540N > ... >> ---[ end trace 95b33ebf87286ae6 ]--- >> ftrace faulted on writing [<ffffffffa0000193>] video_output_register+0x11/0x10a [output] >> >> >> I guess ftrace is trying to NOP out something in the modules which >> are marked read-only ? > > Entirely possible. I will review ftrace and make sure the patch > accounts for this. I've posted new version of the patch that also sets each module's text as RW when ftrace preps the kernel for modifications: [PATCH v7] RO/NX protection for loadable kernel modules Let me know how that works for you. Thank you. -- To unsubscribe from this list: send the line "unsubscribe linux-next" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
