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From: bahadir@l4dev.org (Bahadir Balban)
To: linux-arm-kernel@lists.infradead.org
Subject: Split page tables
Date: Mon, 11 Jan 2010 21:59:09 +0200	[thread overview]
Message-ID: <4B4B830D.20309@l4dev.org> (raw)

Hello,

If split page tables were used in v6/v7, there might have been 
significant page table area savings e.g. 8KB * 256 = 2MB on a 256 
address space system with a 2GB task address space. This also seems to 
bring the relief of not having to map global mappings to every page 
table at run-time. Why wasn't this route chosen? Perhaps because it 
needs the TASK_SIZE to become smaller? Whatif it was made 0x8000 0000?

Thanks,

Bahadir

             reply	other threads:[~2010-01-11 19:59 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-01-11 19:59 Bahadir Balban [this message]
2010-01-12  9:31 ` Split page tables Catalin Marinas
2010-01-12 19:15   ` Bahadir Balban
2010-01-13 10:30     ` Catalin Marinas

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