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Groups > linux.kernel > #1592084
| Path | csiph.com!news.redatomik.org!aioe.org!bofh.it!news.nic.it!robomod |
|---|---|
| From | Borislav Petkov <bp@suse.de> |
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH v4 1/3] x86: Introduce a new constant KERNEL_MAPPING_SIZE |
| Date | Fri, 03 Mar 2017 17:00:01 +0100 |
| Message-ID | <tgUc1-102-3@gated-at.bofh.it> (permalink) |
| References | <t6p9v-441-11@gated-at.bofh.it> <t6p9v-441-9@gated-at.bofh.it> <taPf4-4KR-25@gated-at.bofh.it> <teYtr-1q5-1@gated-at.bofh.it> |
| X-Original-To | Baoquan He <bhe@redhat.com> |
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| Sender | robomod@news.nic.it |
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| X-Original-Cc | tglx@linutronix.de, hpa@zytor.com, mingo@redhat.com, linux-kernel@vger.kernel.org, x86@kernel.org, keescook@chromium.org, yinghai@kernel.org, anderson@redhat.com, luto@kernel.org, thgarnie@google.com, kuleshovmail@gmail.com |
| X-Original-Date | Fri, 3 Mar 2017 12:43:49 +0100 |
| X-Original-Message-ID | <20170303114349.krl6s5qfjmwz3mrg@pd.tnic> |
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On Sun, Feb 26, 2017 at 12:09:08PM +0800, Baoquan He wrote:
> Am I right on understanding it?
That's exactly what I mean: KERNEL_IMAGE_SIZE is 512M by default but
we're not hard-constrained to it - we're hard-constrained to a 1G limit
as this is the 1G which is covered by level2_kernel_pgt.
And in thinking about this more, I know I suggested making the
KERNEL_IMAGE_SIZE by default 1G in order to simplify things.
But you're adding another KERNEL_MAPPING_SIZE which confuses things
more. And I fail to see why we absolutely need it.
So we suggest kernel image size should be 512M but then we still will
be using a whole 1G mapping for it anyway and a whole page of PMDs at
level2_kernel_pgt.
So why even bother?
Just make it 1G and don't introduce anything new.
--
Regards/Gruss,
Boris.
SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg)
--
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Re: [PATCH v4 1/3] x86: Introduce a new constant KERNEL_MAPPING_SIZE Borislav Petkov <bp@suse.de> - 2017-03-03 17:00 +0100
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