From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> To: Andrew Morton <akpm@linux-foundation.org> Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-parisc@vger.kernel.org, "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>, John David Anglin <dave.anglin@bell.net>, Aaro Koskinen <aaro.koskinen@iki.fi>, Graham Gower <graham.gower@gmail.com>, Domenico Andreoli <cavokz@gmail.com> Subject: [PATCH] parisc: fix pmd accounting with 3-level page tables Date: Fri, 13 Mar 2015 12:30:02 +0200 [thread overview] Message-ID: <1426242602-52804-1-git-send-email-kirill.shutemov@linux.intel.com> (raw) There's hack in pgd_alloc() on parisc to initialize one pmd, which is not accounted. It leads to underflow on exit. Let's adjust nr_pmds on pgd_alloc() to get accounting correct. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: John David Anglin <dave.anglin@bell.net> Cc: Aaro Koskinen <aaro.koskinen@iki.fi> Cc: Graham Gower <graham.gower@gmail.com> Cc: Domenico Andreoli <cavokz@gmail.com> --- arch/parisc/include/asm/pgalloc.h | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/parisc/include/asm/pgalloc.h b/arch/parisc/include/asm/pgalloc.h index 55ad8be9b7f3..068b2fb9a47c 100644 --- a/arch/parisc/include/asm/pgalloc.h +++ b/arch/parisc/include/asm/pgalloc.h @@ -38,6 +38,7 @@ static inline pgd_t *pgd_alloc(struct mm_struct *mm) /* The first pmd entry also is marked with _PAGE_GATEWAY as * a signal that this pmd may not be freed */ __pgd_val_set(*pgd, PxD_FLAG_ATTACHED); + mm_inc_nr_pmds(mm); #endif } return actual_pgd; -- 2.1.4
WARNING: multiple messages have this Message-ID (diff)
From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> To: Andrew Morton <akpm@linux-foundation.org> Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-parisc@vger.kernel.org, "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>, John David Anglin <dave.anglin@bell.net>, Aaro Koskinen <aaro.koskinen@iki.fi>, Graham Gower <graham.gower@gmail.com>, Domenico Andreoli <cavokz@gmail.com> Subject: [PATCH] parisc: fix pmd accounting with 3-level page tables Date: Fri, 13 Mar 2015 12:30:02 +0200 [thread overview] Message-ID: <1426242602-52804-1-git-send-email-kirill.shutemov@linux.intel.com> (raw) There's hack in pgd_alloc() on parisc to initialize one pmd, which is not accounted. It leads to underflow on exit. Let's adjust nr_pmds on pgd_alloc() to get accounting correct. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: John David Anglin <dave.anglin@bell.net> Cc: Aaro Koskinen <aaro.koskinen@iki.fi> Cc: Graham Gower <graham.gower@gmail.com> Cc: Domenico Andreoli <cavokz@gmail.com> --- arch/parisc/include/asm/pgalloc.h | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/parisc/include/asm/pgalloc.h b/arch/parisc/include/asm/pgalloc.h index 55ad8be9b7f3..068b2fb9a47c 100644 --- a/arch/parisc/include/asm/pgalloc.h +++ b/arch/parisc/include/asm/pgalloc.h @@ -38,6 +38,7 @@ static inline pgd_t *pgd_alloc(struct mm_struct *mm) /* The first pmd entry also is marked with _PAGE_GATEWAY as * a signal that this pmd may not be freed */ __pgd_val_set(*pgd, PxD_FLAG_ATTACHED); + mm_inc_nr_pmds(mm); #endif } return actual_pgd; -- 2.1.4 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next reply other threads:[~2015-03-13 10:30 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2015-03-13 10:30 Kirill A. Shutemov [this message] 2015-03-13 10:30 ` [PATCH] parisc: fix pmd accounting with 3-level page tables Kirill A. Shutemov 2015-03-13 21:50 ` Graham Gower 2015-03-13 21:50 ` Graham Gower
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