From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mailhub.sw.ru ([195.214.233.200]:11831 "EHLO relay.sw.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1763613AbXHHOTk (ORCPT ); Wed, 8 Aug 2007 10:19:40 -0400 Message-ID: <46B9D056.9040406@openvz.org> Date: Wed, 08 Aug 2007 18:16:54 +0400 From: Pavel Emelyanov MIME-Version: 1.0 Subject: [PATCH] Cleanup oops/bug reports on i386 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-arch-owner@vger.kernel.org To: Andrew Morton Cc: Linux Kernel Mailing List , devel@openvz.org, linux-arch@vger.kernel.org List-ID: Typically the oops first lines look like this: BUG: unable to handle kernel NULL pointer dereference at virtual address 00000000 printing eip: c049dfbd *pde = 00000000 Oops: 0002 [#1] PREEMPT SMP ... Such output is gained with some ugly if (!nl) printk("\n"); code and besides being a waste of lines, this is also annoying to read. The following output looks better (and it is how it looks on x86_64): BUG: unable to handle kernel NULL pointer dereference at virtual address 00000000 printing eip: c049dfbd *pde = 00000000 Oops: 0002 [#1] PREEMPT SMP ... Signed-off-by: Pavel Emelyanov --- arch/i386/kernel/traps.c | 16 ++++------------ arch/i386/mm/fault.c | 13 +++++++------ 2 files changed, 11 insertions(+), 18 deletions(-) diff --git a/arch/i386/kernel/traps.c b/arch/i386/kernel/traps.c index a20c7ad..f469d20 100644 --- a/arch/i386/kernel/traps.c +++ b/arch/i386/kernel/traps.c @@ -368,31 +368,23 @@ void die(const char * str, struct pt_reg local_save_flags(flags); if (++die.lock_owner_depth < 3) { - int nl = 0; unsigned long esp; unsigned short ss; report_bug(regs->eip, regs); - printk(KERN_EMERG "%s: %04lx [#%d]\n", str, err & 0xffff, ++die_counter); + printk(KERN_EMERG "%s: %04lx [#%d] ", str, err & 0xffff, ++die_counter); #ifdef CONFIG_PREEMPT - printk(KERN_EMERG "PREEMPT "); - nl = 1; + printk("PREEMPT "); #endif #ifdef CONFIG_SMP - if (!nl) - printk(KERN_EMERG); printk("SMP "); - nl = 1; #endif #ifdef CONFIG_DEBUG_PAGEALLOC - if (!nl) - printk(KERN_EMERG); printk("DEBUG_PAGEALLOC"); - nl = 1; #endif - if (nl) - printk("\n"); + printk("\n"); + if (notify_die(DIE_OOPS, str, regs, err, current->thread.trap_no, SIGSEGV) != NOTIFY_STOP) { diff --git a/arch/i386/mm/fault.c b/arch/i386/mm/fault.c index fece684..93263aa 100644 --- a/arch/i386/mm/fault.c +++ b/arch/i386/mm/fault.c @@ -537,23 +537,22 @@ no_context: printk(KERN_ALERT "BUG: unable to handle kernel paging" " request"); printk(" at virtual address %08lx\n",address); - printk(KERN_ALERT " printing eip:\n"); - printk("%08lx\n", regs->eip); + printk(KERN_ALERT "printing eip: %08lx ", regs->eip); page = read_cr3(); page = ((__typeof__(page) *) __va(page))[address >> PGDIR_SHIFT]; #ifdef CONFIG_X86_PAE - printk(KERN_ALERT "*pdpt = %016Lx\n", page); + printk("*pdpt = %016Lx ", page); if ((page >> PAGE_SHIFT) < max_low_pfn && page & _PAGE_PRESENT) { page &= PAGE_MASK; page = ((__typeof__(page) *) __va(page))[(address >> PMD_SHIFT) & (PTRS_PER_PMD - 1)]; - printk(KERN_ALERT "*pde = %016Lx\n", page); + printk(KERN_ALERT "*pde = %016Lx ", page); page &= ~_PAGE_NX; } #else - printk(KERN_ALERT "*pde = %08lx\n", page); + printk("*pde = %08lx ", page); #endif /* @@ -567,8 +566,10 @@ no_context: page &= PAGE_MASK; page = ((__typeof__(page) *) __va(page))[(address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)]; - printk(KERN_ALERT "*pte = %0*Lx\n", sizeof(page)*2, (u64)page); + printk("*pte = %0*Lx ", sizeof(page)*2, (u64)page); } + + printk("\n"); } tsk->thread.cr2 = address;