Messages in this thread | | | Date | Thu, 15 Aug 2002 19:10:13 -0700 | From | Dave Hansen <> | Subject | Re: 2.5.31 kmap_atomic copy_*_user benefits |
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William Lee Irwin III wrote: > With and without kmap_atomic() -based copy_*_user() patches from akpm. > Taken on a 16x/16GB box.
Have you seen any instability with these things applied? I seem to be getting a fair amount of these BUG()s. But, I imagine that it could be a race uncovered because of the serialization that highmem locks caused.
kernel BUG at softirq.c:229! invalid operand: 0000 CPU: 4 EIP: 0060:[<8011c8dd>] Not tainted Using defaults from ksymoops -t elf32-i386 -a i386 EFLAGS: 00010246 eax: 00000000 ebx: 80374f54 ecx: 8037e194 edx: ffffffff esi: 00000000 edi: f7fba000 ebp: 80357560 esp: f7fbbf38 ds: 0068 es: 0068 ss: 0068 Stack: 00000001 80353960 fffffffe 00000080 8011c62a 80353960 00000000 8033b800 00000000 f7fbbf78 00000046 801092e1 f7fba000 80105334 00000000 802de388 00000000 80107d28 f7fba000 00000300 f7fba000 80105334 00000000 00000000 Call Trace: [<8011c62a>] [<801092e1>] [<80105334>] [<80107d28>] [<80105334>] [<8010535d>] [<801053b3>] [<801180fd>] Code: 0f 0b e5 00 13 74 27 80 8b 43 10 50 8b 43 0c ff d0 83 c4 04
>>EIP; 8011c8dd <tasklet_hi_action+5d/c4> <=====
>>ebx; 80374f54 <bh_task_vec+14/280> >>ecx; 8037e194 <tv1+14/804> >>ebp; 80357560 <__bss_start+0/0>
Trace; 8011c62a <do_softirq+5a/ac> Trace; 801092e1 <do_IRQ+f1/100> Trace; 80105334 <poll_idle+0/48> Trace; 80107d28 <common_interrupt+18/20> Trace; 80105334 <poll_idle+0/48> Trace; 8010535d <poll_idle+29/48> Trace; 801053b3 <cpu_idle+37/48> Trace; 801180fd <printk+125/140>
Code; 8011c8dd <tasklet_hi_action+5d/c4> 00000000 <_EIP>: Code; 8011c8dd <tasklet_hi_action+5d/c4> <===== 0: 0f 0b ud2a <===== Code; 8011c8df <tasklet_hi_action+5f/c4> 2: e5 00 in $0x0,%eax Code; 8011c8e1 <tasklet_hi_action+61/c4> 4: 13 74 27 80 adc 0xffffff80(%edi,1),%esi Code; 8011c8e5 <tasklet_hi_action+65/c4> 8: 8b 43 10 mov 0x10(%ebx),%eax Code; 8011c8e8 <tasklet_hi_action+68/c4> b: 50 push %eax Code; 8011c8e9 <tasklet_hi_action+69/c4> c: 8b 43 0c mov 0xc(%ebx),%eax Code; 8011c8ec <tasklet_hi_action+6c/c4> f: ff d0 call *%eax Code; 8011c8ee <tasklet_hi_action+6e/c4> 11: 83 c4 04 add $0x4,%esp
-- Dave Hansen haveblue@us.ibm.com
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