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From: Guenter Roeck <guenter.roeck@ericsson.com>
To: linux-mips@linux-mips.org
Subject: VMALLOC_END, TASK_SIZE and FIXADDR_START for 64 bit MIPS kernels
Date: Wed, 3 Feb 2010 14:22:50 -0800	[thread overview]
Message-ID: <20100203222250.GA21139@ericsson.com> (raw)

Hi,

since it came up during the review of the patch for virtual memory detection
on 64 bit mips kernels, I looked further into making vmalloc_end
a variable and TASK_SIZE dependent on the virtual memory size.
 
That turned out to be relatively straightforward, and I have a working patch.

The one question I still have is about FIXADDR_START.  It is currently
set to one of 0xff000000, 0xfffe0000, or (0xff000000 - 0x20000),
depending on the target CPU.

Quoting from one of the comments during the review,
	" ... ensure the value of vmalloc_end is <= FIXADDR_START".

Obviously that is currently not the case. Is that a concern, or is it good as it is ?

Thanks,
Guenter

             reply	other threads:[~2010-02-03 22:21 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-02-03 22:22 Guenter Roeck [this message]
2010-02-08 14:02 ` VMALLOC_END, TASK_SIZE and FIXADDR_START for 64 bit MIPS kernels Ralf Baechle

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