From: David Woodhouse <dwmw2@infradead.org>
To: Russell King - ARM Linux <linux@arm.linux.org.uk>
Cc: riel@conectiva.com.br, linux-mm@kvack.org,
linux-arm-kernel@lists.arm.linux.org.uk
Subject: Re: rmap for ARMV.
Date: Tue, 19 Feb 2002 16:42:11 +0000 [thread overview]
Message-ID: <7261.1014136931@redhat.com> (raw)
In-Reply-To: <20020219161412.B16613@flint.arm.linux.org.uk>
linux@arm.linux.org.uk said:
> When rmap gets merged into the 2.5 kernel series, I'll look at what
> can be done to sort out the pte situation - we could re-jig the page
> tables so a 'pgd' is 8 bytes per entry (made up of two hardware PTE
> pointers), the second level page tables end up being 2K hardware + 2K
> for Linux, which nicely maps to a page per PTE as viewed by Linux.
That would probably make sense - I didn't really want to do something that
intrusive myself. In the meantime, this is also required:
--- linux-2.4.17-arm-rmap.patch 19 Feb 2002 15:59:41 -0000 1.1
+++ linux-2.4.17-arm-rmap.patch 19 Feb 2002 16:24:11 -0000
@@ -39,7 +39,7 @@
if (block & 2047)
BUG();
-@@ -475,11 +495,31 @@
+@@ -475,11 +495,32 @@
PTRS_PER_PTE * sizeof(pte_t), 0);
}
@@ -54,6 +54,7 @@
+ struct page * page = virt_to_page(pte);
+
+ kmem_cache_free(pte_rmap_cache, page->mapping);
++ page->mapping = NULL;
+ }
+}
+
--
dwmw2
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prev parent reply other threads:[~2002-02-19 16:42 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-02-19 16:01 David Woodhouse
2002-02-19 16:14 ` Russell King - ARM Linux
2002-02-19 16:42 ` David Woodhouse [this message]
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