Messages in this thread Patch in this message | | | Subject | Re: WARNING: at mm/slub.c:3357, kernel BUG at mm/slub.c:3413 | From | Eric Dumazet <> | Date | Mon, 21 Nov 2011 17:52:33 +0100 |
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Le lundi 21 novembre 2011 à 17:10 +0100, Markus Trippelsdorf a écrit :
> Sure. This one happend with CONFIG_DEBUG_PAGEALLOC=y: > > [drm] Initialized radeon 2.11.0 20080528 for 0000:01:05.0 on minor 0 > loop: module loaded > ahci 0000:00:11.0: version 3.0 > ahci 0000:00:11.0: PCI INT A -> GSI 22 (level, low) -> IRQ 22 > ahci 0000:00:11.0: AHCI 0001.0100 32 slots 6 ports 3 Gbps 0x3f impl SATA mode > ahci 0000:00:11.0: flags: 64bit ncq sntf ilck pm led clo pmp pio slum part ccc > scsi0 : ahci > scsi1 : ahci > ============================================================================= > BUG task_struct: Poison overwritten > -----------------------------------------------------------------------------
Unfortunately thats the same problem, not catched by DEBUG_PAGEALLOC because freed page is immediately reused.
We should keep pages in free list longer, to have a bigger window.
Hmm...
Please try following patch :
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 9dd443d..b8932a6 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -1196,7 +1196,7 @@ void free_hot_cold_page(struct page *page, int cold) } pcp = &this_cpu_ptr(zone->pageset)->pcp; - if (cold) + if (IS_ENABLED(CONFIG_DEBUG_PAGEALLOC) || cold) list_add_tail(&page->lru, &pcp->lists[migratetype]); else list_add(&page->lru, &pcp->lists[migratetype]);
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