From: Andrew Morton <akpm@linux-foundation.org>
To: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Cc: William Irwin <wli@holomorphy.com>,
linux-mm@kvack.org, LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 5/5] mm: search from free_area_cache for the bigger size
Date: Wed, 1 Feb 2012 14:44:01 -0800 [thread overview]
Message-ID: <20120201144401.af84e3a2.akpm@linux-foundation.org> (raw)
In-Reply-To: <4F1019D3.8020709@linux.vnet.ibm.com>
On Fri, 13 Jan 2012 19:47:31 +0800
Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com> wrote:
> If the required size is bigger than cached_hole_size, we would better search
> from free_area_cache, it is more easier to get free region, specifically for
> the 64 bit process whose address space is large enough
>
> Do it just as hugetlb_get_unmapped_area_topdown() in arch/x86/mm/hugetlbpage.c
Can this cause additional fragmentation of the virtual address region?
If so, what might be the implications of this?
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WARNING: multiple messages have this Message-ID (diff)
From: Andrew Morton <akpm@linux-foundation.org>
To: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Cc: William Irwin <wli@holomorphy.com>,
linux-mm@kvack.org, LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 5/5] mm: search from free_area_cache for the bigger size
Date: Wed, 1 Feb 2012 14:44:01 -0800 [thread overview]
Message-ID: <20120201144401.af84e3a2.akpm@linux-foundation.org> (raw)
In-Reply-To: <4F1019D3.8020709@linux.vnet.ibm.com>
On Fri, 13 Jan 2012 19:47:31 +0800
Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com> wrote:
> If the required size is bigger than cached_hole_size, we would better search
> from free_area_cache, it is more easier to get free region, specifically for
> the 64 bit process whose address space is large enough
>
> Do it just as hugetlb_get_unmapped_area_topdown() in arch/x86/mm/hugetlbpage.c
Can this cause additional fragmentation of the virtual address region?
If so, what might be the implications of this?
next prev parent reply other threads:[~2012-02-01 22:44 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-13 11:44 [PATCH 1/5] hugetlbfs: fix hugetlb_get_unmapped_area Xiao Guangrong
2012-01-13 11:44 ` Xiao Guangrong
2012-01-13 11:44 ` [PATCH 2/5] hugetlb: drop prev_vma in hugetlb_get_unmapped_area_topdown Xiao Guangrong
2012-01-13 11:44 ` Xiao Guangrong
2012-03-07 22:01 ` Andrew Morton
2012-03-07 22:01 ` Andrew Morton
2012-03-08 2:28 ` Xiao Guangrong
2012-03-08 2:28 ` Xiao Guangrong
2012-01-13 11:45 ` [PATCH 3/5] hugetlb: try to search again if it is really needed Xiao Guangrong
2012-01-13 11:45 ` Xiao Guangrong
2012-02-01 22:43 ` Andrew Morton
2012-02-01 22:43 ` Andrew Morton
2012-02-02 5:19 ` Xiao Guangrong
2012-02-02 5:19 ` Xiao Guangrong
2012-01-13 11:46 ` [PATCH 4/5] mm: do not reset cached_hole_size when vma is unmapped Xiao Guangrong
2012-01-13 11:46 ` Xiao Guangrong
2012-01-13 11:47 ` [PATCH 5/5] mm: search from free_area_cache for the bigger size Xiao Guangrong
2012-01-13 11:47 ` Xiao Guangrong
2012-02-01 22:44 ` Andrew Morton [this message]
2012-02-01 22:44 ` Andrew Morton
2012-02-02 7:07 ` Xiao Guangrong
2012-02-02 7:07 ` Xiao Guangrong
2012-01-31 6:05 ` [PATCH 1/5] hugetlbfs: fix hugetlb_get_unmapped_area Xiao Guangrong
2012-01-31 6:05 ` Xiao Guangrong
2012-02-01 22:43 ` Andrew Morton
2012-02-01 22:43 ` Andrew Morton
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