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Message-ID: <49B5534D.6090109@kernel.org> Date: Mon, 09 Mar 2009 10:35:09 -0700 From: Yinghai Lu <yinghai@...nel.org> To: "H. Peter Anvin" <hpa@...or.com> CC: Ingo Molnar <mingo@...e.hu>, Andrew Morton <akpm@...ux-foundation.org>, Thomas Gleixner <tglx@...utronix.de>, Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org> Subject: Re: [PATCH] x86: put initial_pg_tables into .bss -v4 H. Peter Anvin wrote: > Yinghai Lu wrote: >> Impact: cleanup >> >> Don't use ram after _end blindly for pagetables. aka init pages is before _end >> put those pg table into .bss >> >> v2: keep initial page table up to 512M only. >> v4: put initial page tables just before _end >> >> Signed-off-by: Yinghai Lu <yinghai@...nel.org> >> > > I still feel that this is a movement in *EXACTLY* the wrong direction, > as it is deliberately intended to prevent a general allocator for > anything that needs to be dynamic very early on. I still think that > makes a lot more sense. it just estimates initial_pg_tables size, and make _end a little bigger (1M), so boot loader could have idea of correct size of vmlinux aka the uncompressed size of in kernel. I assume brk patches could estimate the extra size that it needs too. YH -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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