From: Scott Wood <scottwood@freescale.com>
To: Suzuki Poulose <suzuki@in.ibm.com>
Cc: Michal Simek <monstr@monstr.eu>,
tmarri@apm.com,
Mahesh Jagannath Salgaonkar <mahesh@linux.vnet.ibm.com>,
Dave Hansen <dave@linux.vnet.ibm.com>,
David Laight <David.Laight@ACULAB.COM>,
Paul Mackerras <paulus@samba.org>,
Alan Modra <amodra@au1.ibm.com>,
linux ppc dev <linuxppc-dev@lists.ozlabs.org>,
Vivek Goyal <vgoyal@redhat.com>
Subject: Re: [PATCH 1/3] [powerpc32] Process dynamic relocations for kernel
Date: Mon, 10 Oct 2011 12:55:47 -0500 [thread overview]
Message-ID: <4E9331A3.9080805@freescale.com> (raw)
In-Reply-To: <4E932897.2060907@in.ibm.com>
On 10/10/2011 12:17 PM, Suzuki Poulose wrote:
> On 10/10/11 20:45, Scott Wood wrote:
>> On 10/10/2011 04:55 AM, Suzuki K. Poulose wrote:
>>> The following patch implements the dynamic relocation processing for
>>> PPC32 kernel. relocate() accepts the target virtual address and
>>> relocates
>>> the kernel image to the same.
>>
>> How much overhead is involved in a true relocatable kernel? Is it worth
>> preserving the old "relocatable" booke behavior under a different name?
>
> There are '75782' on an ebony kernel with minimal config. So thats a
> pretty big
> number for small embedded chips. I guess, preserving the 'old
> relocatable' (page
> aligned approach) would be a good idea for the architectures which can
> afford it.
> e.g, places where TLB size is 64M or less.
The systems we've been using this option on aren't *that* small -- I was
thinking more about runtime overhead (beyond the time taken at boot to
process relocations).
-Scott
next prev parent reply other threads:[~2011-10-10 17:56 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-10 9:54 [PATCH 0/3] Kdump support for PPC440x Suzuki K. Poulose
2011-10-10 9:55 ` [PATCH 1/3] [powerpc32] Process dynamic relocations for kernel Suzuki K. Poulose
2011-10-10 15:15 ` Scott Wood
2011-10-10 17:17 ` Suzuki Poulose
2011-10-10 17:55 ` Scott Wood [this message]
2011-10-10 9:56 ` [PATCH 2/3] [44x] Enable CONFIG_RELOCATABLE for PPC44x Suzuki K. Poulose
2011-10-10 18:00 ` Scott Wood
2011-10-11 12:54 ` Suzuki Poulose
2011-10-12 14:15 ` Dave Hansen
2011-10-25 15:34 ` Scott Wood
2011-10-26 19:12 ` Suzuki Poulose
2011-10-26 19:16 ` Scott Wood
2011-10-27 8:43 ` Suzuki Poulose
2011-10-27 15:41 ` Scott Wood
2011-10-28 5:03 ` Suzuki Poulose
2011-10-10 9:57 ` [PATCH 3/3] [44x] Enable CRASH_DUMP for 440x Suzuki K. Poulose
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