From: linux@arm.linux.org.uk (Russell King - ARM Linux)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH RFC 3/3] ARM: reduce size of page table directory for short mode
Date: Tue, 18 Nov 2014 19:11:04 +0000 [thread overview]
Message-ID: <20141118191104.GD4042@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <20141118181412.GO28279@e104818-lin.cambridge.arm.com>
On Tue, Nov 18, 2014 at 06:14:12PM +0000, Catalin Marinas wrote:
> Actually, with LPAE you can save a pmd and pte allocated for the vectors
> page at 0xffff0000. So you can save 8K per task here. Similarly with the
> classic MMU, you can save another 4K for the vectors page pte.
No. For any CPU which has high vectors (approximately ARMv5 and up),
there is no "vectors page pte". The vectors page PTE is only allocated
when we need low vectors.
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FTTC broadband for 0.8mile line: currently at 9.5Mbps down 400kbps up
according to speedtest.net.
next prev parent reply other threads:[~2014-11-18 19:11 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-18 15:53 [PATCH RFC 1/3] ARM: LPAE: rework TTBR0/TTBR1 split Konstantin Khlebnikov
2014-11-18 15:53 ` [PATCH RFC 2/3] ARM: enable TTBR0/TTBR1 split in short mode Konstantin Khlebnikov
2014-11-18 18:04 ` Catalin Marinas
2014-11-18 15:53 ` [PATCH RFC 3/3] ARM: reduce size of page table directory for " Konstantin Khlebnikov
2014-11-18 18:14 ` Catalin Marinas
2014-11-18 19:11 ` Russell King - ARM Linux [this message]
2014-11-18 23:02 ` Catalin Marinas
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