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From: Ralf Baechle <ralf@linux-mips.org>
To: Krishna Kondaka <Krishna.Kondaka@MCDATA.com>
Cc: linux-mips@linux-mips.org
Subject: Re: mips 32 bit HIGHMEM support
Date: Fri, 10 Oct 2003 19:53:31 +0200	[thread overview]
Message-ID: <20031010175331.GA11082@linux-mips.org> (raw)
In-Reply-To: <501EA67E9359C645A10C42EB5B52480D2AB2D0@SNEXCH01.mcdata.com>

On Fri, Oct 10, 2003 at 10:44:19AM -0700, Krishna Kondaka wrote:

> How safe is it to enable HIGHMEM for sibyte/broadcom's BCM12500 processors?
> Do you know if any one is using HIGHMEM enabled linux on BCM12500s?

Perfectly reliable - in fact highmem for MIPS was written and debugged
on this chip but there are many other that will work just as fine since
they share the technical properties required to run highmem.

Actually with the latest change in CVS enabling CONFIG_HIGHMEM is always
safe; in cases where it's not safe the kernel will simply limit the
memory it's using to just lowmem.

Stil the usual warning applies - highmem is a kludge and for systems
doing heavy I/O it can be a rather slow kludge.  64-bit is the Nirvana
kernel hackers are seeking ;-)

  Ralf

  reply	other threads:[~2003-10-10 17:53 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-10-10 17:44 mips 32 bit HIGHMEM support Krishna Kondaka
2003-10-10 17:44 ` Krishna Kondaka
2003-10-10 17:53 ` Ralf Baechle [this message]
  -- strict thread matches above, loose matches on Subject: below --
2003-10-08 22:00 exister99
2003-10-08 22:00 ` exister99
2003-10-09 14:03 ` Ralf Baechle
2003-10-10 14:59   ` Ralf Baechle

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