From: Jeremy Fitzhardinge <jeremy@goop.org>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: Yinghai Lu <yinghai@kernel.org>, Ingo Molnar <mingo@elte.hu>,
Andrew Morton <akpm@linux-foundation.org>,
Thomas Gleixner <tglx@linutronix.de>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] x86: put initial_pg_tables into .bss -v4
Date: Tue, 10 Mar 2009 18:39:26 -0700 [thread overview]
Message-ID: <49B7164E.3020505@goop.org> (raw)
In-Reply-To: <49B55FBB.7090606@zytor.com>
H. Peter Anvin wrote:
> Yinghai Lu wrote:
>
>> 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.
>>
>>
>
> Yes, and I have made that point several times in this thread already.
>
> I really like the brk interface because it's a clean, general-purpose
> allocator.
>
> We can create a brk segment in vmlinux (and even bound the brk to catch
> overflows, instead of randomly failing) to advertise the presence of the
> brk.
>
I have a patchset to do exactly this in testing; I'll try to mail it out
later this evening. Its very similar (including reserving 1MB after the
end of the bss variables, in the bss section).
J
next prev parent reply other threads:[~2009-03-11 1:39 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-02-28 1:51 [PATCH] Simple brk allocator for very early allocations Jeremy Fitzhardinge
2009-02-28 1:51 ` [PATCH] x86: add brk allocation for very, " Jeremy Fitzhardinge
2009-02-28 1:51 ` [PATCH] x86: reserve brk earlier Jeremy Fitzhardinge
2009-02-28 1:51 ` [PATCH] x86-32: use brk segment for allocating initial kernel pagetable Jeremy Fitzhardinge
2009-02-28 7:02 ` Yinghai Lu
2009-02-28 7:05 ` J Jeremy Fitzhardinge
2009-02-28 7:15 ` J Ingo Molnar
2009-02-28 7:39 ` does boot loader check uncompressed kernel size? Yinghai Lu
2009-02-28 7:47 ` Cyrill Gorcunov
2009-02-28 7:54 ` Yinghai Lu
2009-02-28 8:08 ` H. Peter Anvin
2009-02-28 20:42 ` Yinghai Lu
2009-02-28 7:52 ` brk patches Yinghai Lu
2009-02-28 8:08 ` H. Peter Anvin
2009-02-28 8:17 ` Jeremy Fitzhardinge
2009-02-28 20:40 ` Yinghai Lu
2009-03-01 23:53 ` Jeremy Fitzhardinge
2009-03-02 1:02 ` Yinghai Lu
2009-03-02 1:07 ` H. Peter Anvin
2009-03-02 1:16 ` Jeremy Fitzhardinge
2009-03-02 1:36 ` H. Peter Anvin
2009-03-02 1:54 ` Jeremy Fitzhardinge
2009-03-02 2:12 ` Yinghai Lu
2009-03-01 1:23 ` [PATCH] x86: put initial_pg_tables into bss Yinghai Lu
2009-03-01 8:31 ` [PATCH] x86: put initial_pg_tables into bss -v2 Yinghai Lu
2009-03-01 9:20 ` H. Peter Anvin
2009-03-01 17:49 ` Yinghai Lu
2009-03-01 18:06 ` Yinghai Lu
2009-03-01 23:29 ` H. Peter Anvin
2009-03-02 0:55 ` Yinghai Lu
2009-03-09 8:15 ` [PATCH] x86: put initial_pg_tables into .bss -v4 Yinghai Lu
2009-03-09 15:41 ` H. Peter Anvin
2009-03-09 17:35 ` Yinghai Lu
2009-03-09 18:28 ` H. Peter Anvin
2009-03-11 1:39 ` Jeremy Fitzhardinge [this message]
2009-03-09 7:45 ` [PATCH] x86: put initial_pg_tables into bss -v2 Yinghai Lu
2009-02-28 8:07 ` does boot loader check uncompressed kernel size? H. Peter Anvin
2009-02-28 8:17 ` J Jeremy Fitzhardinge
2009-02-28 7:30 ` J Yinghai Lu
2009-02-28 1:51 ` [PATCH] x86: use brk allocation for DMI Jeremy Fitzhardinge
2009-02-28 1:51 ` [PATCH] x86: leave _brk_end defined Jeremy Fitzhardinge
2009-02-28 5:23 ` [PATCH] Simple brk allocator for very early allocations Andrew Morton
2009-02-28 6:30 ` Jeremy Fitzhardinge
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