From: "Kirill A. Shutemov" <kirill@shutemov.name>
To: Steve Capper <steve.capper@linaro.org>
Cc: linux-mm@kvack.org, x86@kernel.org, linux-arch@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
Michal Hocko <mhocko@suse.cz>, Ken Chen <kenchen@google.com>,
Mel Gorman <mgorman@suse.de>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will.deacon@arm.com>,
patches@linaro.org
Subject: Re: [RFC PATCH v2 05/11] mm: thp: Correct the HPAGE_PMD_ORDER check.
Date: Wed, 8 May 2013 15:44:17 +0300 [thread overview]
Message-ID: <20130508124417.GA29631@shutemov.name> (raw)
In-Reply-To: <1368006763-30774-6-git-send-email-steve.capper@linaro.org>
On Wed, May 08, 2013 at 10:52:37AM +0100, Steve Capper wrote:
> All Transparent Huge Pages are allocated by the buddy allocator.
>
> A compile time check is in place that fails when the order of a
> transparent huge page is too large to be allocated by the buddy
> allocator. Unfortunately that compile time check passes when:
> HPAGE_PMD_ORDER == MAX_ORDER
> ( which is incorrect as the buddy allocator can only allocate
> memory of order strictly less than MAX_ORDER. )
It looks confusing to me. Shouldn't we fix what MAX_ORDER means instead?
--
Kirill A. Shutemov
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next prev parent reply other threads:[~2013-05-08 11:50 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-05-08 9:52 [RFC PATCH v2 00/11] HugeTLB and THP support for ARM64 Steve Capper
2013-05-08 9:52 ` [RFC PATCH v2 01/11] mm: hugetlb: Copy huge_pmd_share from x86 to mm Steve Capper
2013-05-08 9:52 ` [RFC PATCH v2 02/11] x86: mm: Remove x86 version of huge_pmd_share Steve Capper
2013-05-08 9:52 ` [RFC PATCH v2 03/11] mm: hugetlb: Copy general hugetlb code from x86 to mm Steve Capper
2013-05-08 9:52 ` [RFC PATCH v2 04/11] x86: mm: Remove general hugetlb code from x86 Steve Capper
2013-05-08 9:52 ` [RFC PATCH v2 05/11] mm: thp: Correct the HPAGE_PMD_ORDER check Steve Capper
2013-05-08 12:44 ` Kirill A. Shutemov [this message]
2013-05-08 12:03 ` Steve Capper
2013-05-08 9:52 ` [RFC PATCH v2 06/11] ARM64: mm: Restore memblock limit when map_mem finished Steve Capper
2013-05-16 13:52 ` Catalin Marinas
2013-05-08 9:52 ` [RFC PATCH v2 07/11] ARM64: mm: Make PAGE_NONE pages read only and no-execute Steve Capper
2013-05-08 16:43 ` Will Deacon
2013-05-09 8:27 ` Steve Capper
2013-05-08 9:52 ` [RFC PATCH v2 08/11] ARM64: mm: Swap PTE_FILE and PTE_PROT_NONE bits Steve Capper
2013-05-08 16:17 ` Christopher Covington
2013-05-09 8:15 ` Steve Capper
2013-05-08 16:40 ` Will Deacon
2013-05-09 8:22 ` Steve Capper
2013-05-16 14:58 ` Catalin Marinas
2013-05-08 9:52 ` [RFC PATCH v2 09/11] ARM64: mm: HugeTLB support Steve Capper
2013-05-16 14:32 ` Catalin Marinas
2013-05-17 8:41 ` Steve Capper
2013-05-08 9:52 ` [RFC PATCH v2 10/11] ARM64: mm: Raise MAX_ORDER for 64KB pages and THP Steve Capper
2013-05-16 14:59 ` Catalin Marinas
2013-05-08 9:52 ` [RFC PATCH v2 11/11] ARM64: mm: THP support Steve Capper
2013-05-16 15:01 ` Catalin Marinas
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