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Re: [PATCH] MIPS: Flush huge TLB

from [Sergei Shtylyov] [Permanent Link][Original]
To: Hillf Danton <dhillf@gmail.com>
Subject: Re: [PATCH] MIPS: Flush huge TLB
From: Sergei Shtylyov <sshtylyov@mvista.com>
Date: Mon, 21 Nov 2011 14:48:07 +0400
Cc: Ralf Baechle <ralf@linux-mips.org>, David Daney <david.daney@cavium.com>, "Jayachandran C." <jayachandranc@netlogicmicro.com>, linux-mips@linux-mips.org
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Hello.

On 18-11-2011 17:15, Hillf Danton wrote:


When flushing TLB, if @vma is backed by huge page, we could flush huge TLB,
due to that huge page is defined to be far from normal page.



Signed-off-by: Hillf Danton<dhillf@gmail.com>
---



--- a/arch/mips/mm/tlb-r4k.c    Mon May 30 21:17:04 2011
+++ b/arch/mips/mm/tlb-r4k.c    Fri Nov 18 21:13:13 2011
@@ -120,22 +120,30 @@ void local_flush_tlb_range(struct vm_are

[...]

                                write_c0_entryhi(start | newpid);
-                               start += (PAGE_SIZE<<  1);
+                               if (huge)
+                                       start += HPAGE_SIZE;
+                               else
+                                       start += (PAGE_SIZE << 1);


   Parens not needed.

WBR, Sergei
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