From: "David S. Miller" <davem@redhat.com>
To: akpm@digeo.com
Cc: rohit.seth@intel.com, davidm@napali.hpl.hp.com, anton@samba.org,
wli@holomorphy.com, linux-mm@kvack.org
Subject: Re: hugepage patches
Date: Fri, 31 Jan 2003 15:13:10 -0800 (PST) [thread overview]
Message-ID: <20030131.151310.25151725.davem@redhat.com> (raw)
In-Reply-To: <20030131151501.7273a9bf.akpm@digeo.com>
- need to implement either hugepage_vma()/follow_huge_addr() or
pmd_huge()/follow_huge_pmd(), depending on whether a page's hugeness can be
determined via pmd inspection. Implementations of both schemes for ia32
are here.
Remind me why we can't just look at the PTE? Why can't
we end up doing something like:
if (!pmd_is_huge(pmd)) {
ptep = ...;
if (pte_is_huge(*ptep)) {
}
}
Which is what all these systems besides x86 and PPC-BAT are doing. I
don't see the real requirement for a full VMA lookup in these cases.
The page tables say fully whether we have huge stuff here or not.
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next prev parent reply other threads:[~2003-01-31 23:13 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-01-31 23:15 Andrew Morton
2003-01-31 23:13 ` David S. Miller [this message]
2003-01-31 23:36 ` Andrew Morton
2003-01-31 23:23 ` David S. Miller
2003-01-31 23:45 ` Andrew Morton
2003-01-31 23:48 ` David S. Miller
2003-01-31 23:16 ` Andrew Morton
2003-01-31 23:17 ` Andrew Morton
2003-01-31 23:18 ` Andrew Morton
2003-01-31 23:18 ` Andrew Morton
2003-02-01 8:58 ` Ingo Oeser
2003-02-01 9:31 ` Andrew Morton
2003-02-01 10:00 ` William Lee Irwin III
2003-02-01 10:14 ` Andrew Morton
2003-02-02 10:55 ` Andrew Morton
2003-02-02 10:55 ` Andrew Morton
2003-02-02 19:59 ` William Lee Irwin III
2003-02-02 20:49 ` Andrew Morton
2003-02-03 15:09 ` Eric W. Biederman
2003-02-03 21:29 ` Andrew Morton
2003-02-04 5:37 ` Eric W. Biederman
2003-02-04 5:50 ` William Lee Irwin III
2003-02-04 7:06 ` Eric W. Biederman
2003-02-04 7:16 ` Martin J. Bligh
2003-02-04 12:40 ` Eric W. Biederman
2003-02-04 15:55 ` Martin J. Bligh
2003-02-05 12:18 ` Eric W. Biederman
2003-02-04 21:12 ` Andrew Morton
2003-02-05 12:25 ` Eric W. Biederman
2003-02-05 19:57 ` Andrew Morton
2003-02-05 20:00 ` Andrew Morton
2003-02-02 10:55 ` Andrew Morton
2003-02-02 10:56 ` Andrew Morton
2003-02-02 20:06 ` William Lee Irwin III
2003-02-02 10:56 ` Andrew Morton
2003-02-02 10:56 ` Andrew Morton
2003-02-02 10:57 ` Andrew Morton
2003-02-02 10:57 ` Andrew Morton
2003-02-02 20:17 ` William Lee Irwin III
2003-02-02 10:57 ` Andrew Morton
2003-02-07 21:49 Seth, Rohit
2003-02-07 22:00 ` Andrew Morton
2003-02-07 22:02 Seth, Rohit
2003-02-07 22:24 ` Andrew Morton
2003-02-08 1:47 Seth, Rohit
2003-02-08 2:02 ` Andrew Morton
2003-02-08 3:05 Seth, Rohit
2003-02-08 8:48 ` Andrew Morton
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