On Tue, Apr 22, 2014 at 4:30 PM, Ezequiel Garcia <ezequiel.garcia@xxxxxxxxxxxxxxxxxx> wrote: > On Apr 18, Ley Foon Tan wrote: >> + >> +bad_area_nosemaphore: >> + /* User mode accesses just cause a SIGSEGV */ >> + if (user_mode(regs)) { > > I found that it's useful to add some printing here, just as ARM > does. I carry this patch on my kernel: > > + printk(KERN_INFO "%s: unhandled page fault (%d) at 0x%08lx, cause %ld\n", > + current->comm, SIGSEGV, address, cause); > + show_regs(regs); > > Do you think we could do something like it? Maybe with a compile time option? Can this easily be triggered from userspace? If yes, please use pr_info_ratelimited(). Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html