From: Andi Kleen <ak@linux.intel.com>
To: Andrea Arcangeli <aarcange@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
linux-mm@kvack.org, "H. Peter Anvin" <hpa@linux.intel.com>,
linux-kernel@vger.kernel.org,
"Kirill A. Shutemov" <kirill@shutemov.name>
Subject: Re: [PATCH, RFC 0/9] Introduce huge zero page
Date: Thu, 16 Aug 2012 16:12:47 -0700 [thread overview]
Message-ID: <20120816231247.GA4461@tassilo.jf.intel.com> (raw)
In-Reply-To: <20120816194024.GP11188@redhat.com>
> Because this is done the right way (i.e. to allocate an hugepage at
> the first wp fault, and to fallback exclusively if compaction fails)
> it will help much less than the 4k zero pages if the zero pages are
The main benefit is that you have a zero page with THP enabled.
So it lowers the cost of having THP on (for workloads that benefit
from a zero page)
-Andi
--
ak@linux.intel.com -- Speaking for myself only
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prev parent reply other threads:[~2012-08-16 23:12 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-09 9:08 Kirill A. Shutemov
2012-08-09 9:08 ` [PATCH, RFC 1/9] thp: huge zero page: basic preparation Kirill A. Shutemov
2012-08-09 9:08 ` [PATCH, RFC 2/9] thp: zap_huge_pmd(): zap huge zero pmd Kirill A. Shutemov
2012-08-09 9:08 ` [PATCH, RFC 3/9] thp: copy_huge_pmd(): copy huge zero page Kirill A. Shutemov
2012-08-09 9:08 ` [PATCH, RFC 4/9] thp: do_huge_pmd_wp_page(): handle " Kirill A. Shutemov
2012-08-09 9:08 ` [PATCH, RFC 5/9] thp: change_huge_pmd(): keep huge zero page write-protected Kirill A. Shutemov
2012-08-09 9:08 ` [PATCH, RFC 6/9] thp: add address parameter to split_huge_page_pmd() Kirill A. Shutemov
2012-08-16 19:42 ` Andrea Arcangeli
2012-08-17 7:49 ` Kirill A. Shutemov
2012-08-09 9:08 ` [PATCH, RFC 7/9] thp: implement splitting pmd for huge zero page Kirill A. Shutemov
2012-08-16 19:27 ` Andrea Arcangeli
2012-08-17 8:12 ` Kirill A. Shutemov
2012-08-17 16:33 ` Andrea Arcangeli
2012-08-31 14:06 ` Kirill A. Shutemov
2012-08-09 9:08 ` [PATCH, RFC 8/9] thp: setup huge zero page on non-write page fault Kirill A. Shutemov
2012-08-09 9:08 ` [PATCH, RFC 9/9] thp: lazy huge zero page allocation Kirill A. Shutemov
2012-08-10 3:49 ` [PATCH, RFC 0/9] Introduce huge zero page Wanpeng Li
2012-08-10 10:33 ` Kirill A. Shutemov
2012-08-11 1:10 ` Wanpeng Li
2012-08-11 1:10 ` Wanpeng Li
2012-08-10 3:49 ` Wanpeng Li
2012-08-16 19:20 ` Andrew Morton
2012-08-16 19:40 ` Andrea Arcangeli
2012-08-16 23:08 ` H. Peter Anvin
2012-08-16 23:12 ` Andi Kleen [this message]
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