Messages in this thread | | | Date | Fri, 08 Jun 2007 21:32:35 +0200 | Subject | Re: [patch 00/12] Slab defragmentation V3 | From | Michal Piotrowski <> |
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Christoph Lameter pisze: > On Fri, 8 Jun 2007, Michal Piotrowski wrote: > >> Yes, it does. Thanks! > > Ahhh... That leds to the discovery more sysfs problems. I need to make > sure not to be holding locks while calling into sysfs. More cleanup... > >
sysfs... I forgot about my sysfs test case
#! /bin/sh
for i in `find /sys/ -type f` do echo "wyświetlam $i" sudo cat $i > /dev/null # sleep 1s done
[ 2816.175573] BUG: sleeping function called from invalid context at mm/page_alloc.c:1547 [ 2816.183578] in_atomic():1, irqs_disabled():1 [ 2816.187946] 1 lock held by cat/12586: [ 2816.191705] #0: (&n->list_lock){++..}, at: [<c0481630>] list_locations+0x3d/0x26b
l *list_locations+0x3d 0xc1081630 is in list_locations (mm/slub.c:3388). 3383 struct page *page; 3384 3385 if (!atomic_read(&n->nr_slabs)) 3386 continue; 3387 3388 spin_lock_irqsave(&n->list_lock, flags); 3389 list_for_each_entry(page, &n->partial, lru) 3390 process_slab(&t, s, page, alloc); 3391 list_for_each_entry(page, &n->full, lru) 3392 process_slab(&t, s, page, alloc);
[ 2816.199571] irq event stamp: 11526 [ 2816.203054] hardirqs last enabled at (11525): [<c042adbd>] on_each_cpu+0x3b/0x71 [ 2816.210689] hardirqs last disabled at (11526): [<c065d241>] _spin_lock_irqsave+0x13/0x6e [ 2816.218910] softirqs last enabled at (11236): [<c042b5dd>] __do_softirq+0xdf/0xe5 [ 2816.226635] softirqs last disabled at (11229): [<c0406d65>] do_softirq+0x68/0x11f
l *on_each_cpu+0x3b 0xc102adbd is in on_each_cpu (include/asm/irqflags.h:36). 31 asm volatile("cli": : :"memory"); 32 } 33 34 static inline void native_irq_enable(void) 35 { 36 asm volatile("sti": : :"memory"); 37 } 38 39 static inline void native_safe_halt(void) 40 {
l *_spin_lock_irqsave+0x13 0xc125d241 is in _spin_lock_irqsave (kernel/spinlock.c:84). 79 unsigned long __lockfunc _spin_lock_irqsave(spinlock_t *lock) 80 { 81 unsigned long flags; 82 83 local_irq_save(flags); 84 preempt_disable(); 85 spin_acquire(&lock->dep_map, 0, 0, _RET_IP_); 86 /* 87 * On lockdep we dont want the hand-coded irq-enable of 88 * _raw_spin_lock_flags() code, because lockdep assumes
l *__do_softirq+0xdf 0xc102b5dd is in __do_softirq (kernel/softirq.c:252). 247 248 trace_softirq_exit(); 249 250 account_system_vtime(current); 251 _local_bh_enable(); 252 } 253 254 #ifndef __ARCH_HAS_DO_SOFTIRQ 255 256 asmlinkage void do_softirq(void)
l *do_softirq+0x68 0xc1006d65 is in do_softirq (arch/i386/kernel/irq.c:222). 217 irqctx->tinfo.previous_esp = current_stack_pointer; 218 219 /* build the stack frame on the softirq stack */ 220 isp = (u32*) ((char*)irqctx + sizeof(*irqctx)); 221 222 asm volatile( 223 " xchgl %%ebx,%%esp \n" 224 " call __do_softirq \n" 225 " movl %%ebx,%%esp \n" 226 : "=b"(isp)
[ 2816.234235] [<c04052ad>] dump_trace+0x63/0x1eb [ 2816.238888] [<c040544f>] show_trace_log_lvl+0x1a/0x2f [ 2816.244211] [<c040608d>] show_trace+0x12/0x14 [ 2816.248757] [<c04060a5>] dump_stack+0x16/0x18 [ 2816.253288] [<c041eef1>] __might_sleep+0xce/0xd5 [ 2816.258046] [<c04680b5>] __alloc_pages+0x33/0x324 [ 2816.262968] [<c04683fb>] __get_free_pages+0x55/0x66 [ 2816.268060] [<c0481517>] process_slab+0x1bd/0x299 [ 2816.272988] [<c048164a>] list_locations+0x57/0x26b [ 2816.277981] [<c0481880>] free_calls_show+0x22/0x29 [ 2816.282965] [<c047e702>] slab_attr_show+0x1c/0x20 [ 2816.287891] [<c04c1bd9>] sysfs_read_file+0x94/0x105 [ 2816.293018] [<c048580b>] vfs_read+0xcf/0x158 [ 2816.297539] [<c0485c71>] sys_read+0x3d/0x72 [ 2816.301910] [<c040420c>] syscall_call+0x7/0xb [ 2816.306486] [<b7f30410>] 0xb7f30410 [ 2816.310165] ======================= [ 2818.826341] BUG: sleeping function called from invalid context at mm/page_alloc.c:1547 [ 2818.834388] in_atomic():1, irqs_disabled():1 [ 2818.838751] 1 lock held by cat/12635: [ 2818.842506] #0: (&n->list_lock){++..}, at: [<c0481630>] list_locations+0x3d/0x26b [ 2818.850460] irq event stamp: 11494 [ 2818.853908] hardirqs last enabled at (11493): [<c042adbd>] on_each_cpu+0x3b/0x71 [ 2818.861505] hardirqs last disabled at (11494): [<c065d241>] _spin_lock_irqsave+0x13/0x6e [ 2818.869831] softirqs last enabled at (11258): [<c042b5dd>] __do_softirq+0xdf/0xe5 [ 2818.877576] softirqs last disabled at (11215): [<c0406d65>] do_softirq+0x68/0x11f [ 2818.885217] [<c04052ad>] dump_trace+0x63/0x1eb [ 2818.889893] [<c040544f>] show_trace_log_lvl+0x1a/0x2f [ 2818.895112] [<c040608d>] show_trace+0x12/0x14 [ 2818.899667] [<c04060a5>] dump_stack+0x16/0x18 [ 2818.904232] [<c041eef1>] __might_sleep+0xce/0xd5 [ 2818.909046] [<c04680b5>] __alloc_pages+0x33/0x324 [ 2818.913956] [<c04683fb>] __get_free_pages+0x55/0x66 [ 2818.919022] [<c0481517>] process_slab+0x1bd/0x299 [ 2818.923923] [<c048164a>] list_locations+0x57/0x26b [ 2818.928961] [<c0481880>] free_calls_show+0x22/0x29 [ 2818.933916] [<c047e702>] slab_attr_show+0x1c/0x20 [ 2818.938825] [<c04c1bd9>] sysfs_read_file+0x94/0x105 [ 2818.943900] [<c048580b>] vfs_read+0xcf/0x158 [ 2818.948335] [<c0485c71>] sys_read+0x3d/0x72 [ 2818.952683] [<c040420c>] syscall_call+0x7/0xb [ 2818.957213] [<b7f82410>] 0xb7f82410 [ 2818.960896] =======================
http://www.stardust.webpages.pl/files/tbf/bitis-gabonica/2.6.22-rc4-mm2-sd3/sd-dmesg2
Regards, Michal
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