From: "Ken Chen" <kenchen@google.com>
To: David Gibson <david@gibson.dropbear.id.au>
Cc: akpm@linux-foundation.org, agl@us.ibm.com, nacc@us.ibm.com,
wli@holomorphy.com, linux-mm@kvack.org
Subject: Re: + hugetlb-allow-extending-ftruncate-on-hugetlbfs.patch added to -mm tree
Date: Mon, 6 Aug 2007 21:28:01 -0700 [thread overview]
Message-ID: <b040c32a0708062128r42d6a067l3a0c8c3818660e13@mail.gmail.com> (raw)
In-Reply-To: <20070807041559.GH13522@localhost.localdomain>
On 8/6/07, David Gibson <david@gibson.dropbear.id.au> wrote:
> Ken, is this quite sufficient? At least if we're expanding a
> MAP_SHARED hugepage mapping, we should pre-reserve hugepages on an
> expanding ftruncate().
why do we need to reserve them? mmap segments aren't extended, e.g.
vma length remains the same. We only expand file size.
- Ken
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next parent reply other threads:[~2007-08-07 4:28 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <200708061830.l76IUA6j008338@imap1.linux-foundation.org>
[not found] ` <20070807041559.GH13522@localhost.localdomain>
2007-08-07 4:28 ` Ken Chen [this message]
2007-08-07 6:44 ` David Gibson
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