* [PATCH] powerpc/mm: Fix infinite loop in hash fault with 4K page size
@ 2015-11-28 17:09 Aneesh Kumar K.V
2015-12-01 6:50 ` Anshuman Khandual
2015-12-14 10:46 ` Michael Ellerman
0 siblings, 2 replies; 3+ messages in thread
From: Aneesh Kumar K.V @ 2015-11-28 17:09 UTC (permalink / raw)
To: benh, paulus, mpe; +Cc: linuxppc-dev, Aneesh Kumar K.V
This is the same bug we fixed as part of 09567e7fd44291bfc08accfdd67ad8f467842332
("powerpc/mm: Check paca psize is up to date for huge mappings"). Please
check that for details. The difference here is that faults were
happening on a 4K page at an address previously mapped by hugetlb.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
---
arch/powerpc/mm/hash_utils_64.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64.c
index 3d261bc6fef8..4233dcccbaf7 100644
--- a/arch/powerpc/mm/hash_utils_64.c
+++ b/arch/powerpc/mm/hash_utils_64.c
@@ -1124,9 +1124,10 @@ int hash_page_mm(struct mm_struct *mm, unsigned long ea,
}
}
+#endif /* CONFIG_PPC_64K_PAGES */
+
if (current->mm == mm)
check_paca_psize(ea, mm, psize, user_region);
-#endif /* CONFIG_PPC_64K_PAGES */
#ifdef CONFIG_PPC_64K_PAGES
if (psize == MMU_PAGE_64K)
--
2.5.0
^ permalink raw reply related [flat|nested] 3+ messages in thread* Re: [PATCH] powerpc/mm: Fix infinite loop in hash fault with 4K page size
2015-11-28 17:09 [PATCH] powerpc/mm: Fix infinite loop in hash fault with 4K page size Aneesh Kumar K.V
@ 2015-12-01 6:50 ` Anshuman Khandual
2015-12-14 10:46 ` Michael Ellerman
1 sibling, 0 replies; 3+ messages in thread
From: Anshuman Khandual @ 2015-12-01 6:50 UTC (permalink / raw)
To: Aneesh Kumar K.V, benh, paulus, mpe; +Cc: linuxppc-dev
On 11/28/2015 10:39 PM, Aneesh Kumar K.V wrote:
> This is the same bug we fixed as part of 09567e7fd44291bfc08accfdd67ad8f467842332
> ("powerpc/mm: Check paca psize is up to date for huge mappings"). Please
> check that for details. The difference here is that faults were
> happening on a 4K page at an address previously mapped by hugetlb.
>
> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Reviewed-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: powerpc/mm: Fix infinite loop in hash fault with 4K page size
2015-11-28 17:09 [PATCH] powerpc/mm: Fix infinite loop in hash fault with 4K page size Aneesh Kumar K.V
2015-12-01 6:50 ` Anshuman Khandual
@ 2015-12-14 10:46 ` Michael Ellerman
1 sibling, 0 replies; 3+ messages in thread
From: Michael Ellerman @ 2015-12-14 10:46 UTC (permalink / raw)
To: Aneesh Kumar K.V, benh, paulus; +Cc: linuxppc-dev, Aneesh Kumar K.V
On Sat, 2015-28-11 at 17:09:33 UTC, "Aneesh Kumar K.V" wrote:
> This is the same bug we fixed as part of 09567e7fd44291bfc08accfdd67ad8f467842332
> ("powerpc/mm: Check paca psize is up to date for huge mappings"). Please
> check that for details. The difference here is that faults were
> happening on a 4K page at an address previously mapped by hugetlb.
>
> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
> Reviewed-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Applied to powerpc next, thanks.
https://git.kernel.org/powerpc/c/0863d7f2136550a281f40f4d
cheers
^ permalink raw reply [flat|nested] 3+ messages in thread
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2015-11-28 17:09 [PATCH] powerpc/mm: Fix infinite loop in hash fault with 4K page size Aneesh Kumar K.V
2015-12-01 6:50 ` Anshuman Khandual
2015-12-14 10:46 ` Michael Ellerman
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