From: Andi Kleen <ak@suse.de>
To: discuss@x86-64.org
Cc: Hugh Dickins <hugh@veritas.com>, Thayne Harbaugh <thayne@c2.net>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [discuss] [PATCH] Inconsistent mmap()/mremap() flags
Date: Tue, 2 Oct 2007 15:45:32 +0200 [thread overview]
Message-ID: <200710021545.32556.ak@suse.de> (raw)
In-Reply-To: <Pine.LNX.4.64.0710021304230.26719@blonde.wat.veritas.com>
> First call mmap with a low hint address, the new size you'll be wanting
> from the mremap, PROT_NONE, MAP_ANONYMOUS, -1, 0. Then call mremap with
> old address, old size, new size, MREMAP_MAYMOVE|MREMAP_FIXED, and new
> address as returned by the preparatory mmap.
That's racy unfortunately in a multithreaded process. They would need to loop.
-Andi
WARNING: multiple messages have this Message-ID (diff)
From: Andi Kleen <ak@suse.de>
To: discuss@x86-64.org
Cc: Hugh Dickins <hugh@veritas.com>, Thayne Harbaugh <thayne@c2.net>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [discuss] [PATCH] Inconsistent mmap()/mremap() flags
Date: Tue, 2 Oct 2007 15:45:32 +0200 [thread overview]
Message-ID: <200710021545.32556.ak@suse.de> (raw)
In-Reply-To: <Pine.LNX.4.64.0710021304230.26719@blonde.wat.veritas.com>
> First call mmap with a low hint address, the new size you'll be wanting
> from the mremap, PROT_NONE, MAP_ANONYMOUS, -1, 0. Then call mremap with
> old address, old size, new size, MREMAP_MAYMOVE|MREMAP_FIXED, and new
> address as returned by the preparatory mmap.
That's racy unfortunately in a multithreaded process. They would need to loop.
-Andi
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next prev parent reply other threads:[~2007-10-02 13:45 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-09-28 5:46 [PATCH] Inconsistent mmap()/mremap() flags Thayne Harbaugh
2007-09-28 5:46 ` Thayne Harbaugh
2007-10-01 11:13 ` Andi Kleen
2007-10-01 11:13 ` Andi Kleen
2007-10-02 2:57 ` Thayne Harbaugh
2007-10-02 2:57 ` Thayne Harbaugh
2007-10-02 5:15 ` Andi Kleen
2007-10-02 5:15 ` Andi Kleen
2007-10-02 7:06 ` Thayne Harbaugh
2007-10-02 7:06 ` Thayne Harbaugh
2007-10-02 12:19 ` Hugh Dickins
2007-10-02 12:19 ` Hugh Dickins
2007-10-02 13:45 ` Andi Kleen [this message]
2007-10-02 13:45 ` [discuss] " Andi Kleen
2007-10-02 14:16 ` Hugh Dickins
2007-10-02 14:16 ` Hugh Dickins
2007-10-02 15:21 ` Thayne Harbaugh
2007-10-02 15:21 ` Thayne Harbaugh
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