Messages in this thread Patch in this message | | | Date | Tue, 20 Jan 2004 17:21:11 +1100 | From | David Gibson <> | Subject | [PPC64] Bug fix for hugepages on ppc64 |
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Andrew, please apply.
Currently the flag indicating whether or not hugepages are allowed below 4GB is not correctly propagated across fork(), which can lead to oopses. The patch below fixes this.
diff -urN ppc64-linux-2.5/include/asm-ppc64/mmu_context.h linux-gogogo/include/asm-ppc64/mmu_context.h --- ppc64-linux-2.5/include/asm-ppc64/mmu_context.h 2003-12-18 09:29:18.000000000 +1100 +++ linux-gogogo/include/asm-ppc64/mmu_context.h 2004-01-19 15:36:43.518987021 +1100 @@ -81,6 +81,8 @@ { long head; unsigned long flags; + /* This does the right thing across a fork (I hope) */ + unsigned long low_hpages = mm->context & CONTEXT_LOW_HPAGES; spin_lock_irqsave(&mmu_context_queue.lock, flags); @@ -91,6 +93,7 @@ head = mmu_context_queue.head; mm->context = mmu_context_queue.elements[head]; + mm->context |= low_hpages; head = (head < LAST_USER_CONTEXT-1) ? head+1 : 0; mmu_context_queue.head = head;
-- David Gibson | For every complex problem there is a david AT gibson.dropbear.id.au | solution which is simple, neat and | wrong. http://www.ozlabs.org/people/dgibson - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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