From: Ingo Molnar <mingo@redhat.com>
To: Hugh Dickins <hugh@veritas.com>
Cc: Jamie Lokier <jamie@shareable.org>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: Non-linear mappings and truncate/madvise(MADV_DONTNEED)
Date: Thu, 22 Apr 2004 03:50:54 -0400 (EDT) [thread overview]
Message-ID: <Pine.LNX.4.58.0404220349040.13746@devserv.devel.redhat.com> (raw)
In-Reply-To: <Pine.LNX.4.44.0404191548030.24243-100000@localhost.localdomain>
On Mon, 19 Apr 2004, Hugh Dickins wrote:
> rmap 6 nonlinear truncation (which never appeared on LKML, though
> sent twice) fixed most of this, and went into 2.6.6-rc1-bk4 last
> night: please check it out.
>
> But I just converted madvise_dontneed by rote, adding a NULL arg to
> zap_page_range, missing your point that it should respect nonlinearity.
>
> And I made the zap_details structure private to mm/memory.c since I
> hadn't noticed anything outside needing it: I'll fix that up later and
> post a patch.
>
> I'm haven't and don't intend to change the behaviour of ->populate,
> without agreement from others - Ingo? Jamie?
feel free. I've got followup work, protection bits stored in the swap pte,
thus per-page protection possible via remap_file_pages_prot(). (earlier
-mm trees had this but it clashed with objrmap which has priority.)
Ingo
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prev parent reply other threads:[~2004-04-22 7:50 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-04-19 13:32 Jamie Lokier
2004-04-19 15:01 ` Hugh Dickins
2004-04-22 7:50 ` Ingo Molnar [this message]
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