LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Andi Kleen <ak@suse.de>
To: Yasunori Goto <y-goto@jp.fujitsu.com>
Cc: Ingo Molnar <mingo@elte.hu>,
tglx@linutronix.de, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] [5/8] Fix logic error in 64bit memory hotadd
Date: Tue, 12 Feb 2008 12:20:51 +0100 [thread overview]
Message-ID: <200802121220.51755.ak@suse.de> (raw)
In-Reply-To: <20080212190310.F9E8.Y-GOTO@jp.fujitsu.com>
On Tuesday 12 February 2008 11:35:22 Yasunori Goto wrote:
> Hi Ingo-san.
>
> > > Does anyone even
> > > use memory hotplug currently?
> >
> > I don't know.
>
> IBM's powerpc box can memory hot-add/remove by dynamic partitioning.
> And our fujitsu server has memory hot-add feature (Ia-64).
> So, they are concrete user of memory hotplug.
>
> In x86, E8500 chipset has the feature of memory-hotplug.
> (I searched a data-sheet from intel site.)
> http://download.intel.com/design/chipsets/e8500/datashts/30674501.pdf
> (6.3.8 IMI Hot-Plug)
>
> So, it depends on how many server uses it, I think.
With the logic pud error i found and that seems currently will stay
for the forseeable future in the tree I don't think x86-64 64bit hotadds for more
than 1GB have ever worked with the sparsemem method.
Older trees (before 2.6.24) had also a different method that did
preallocate everything based on the SRAT. That one should have worked
for this case.
-Andi
next prev parent reply other threads:[~2008-02-12 11:21 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-02-11 9:34 [PATCH] [0/8] Various kernel mapping bug fixes Andi Kleen
2008-02-11 9:34 ` [PATCH] [1/8] CPA: Fix gbpages support in try_preserve_lage_page Andi Kleen
2008-02-11 9:45 ` Thomas Gleixner
2008-02-11 10:12 ` Ingo Molnar
2008-02-11 11:01 ` Andi Kleen
2008-02-11 9:34 ` [PATCH] [2/8] CPA: Flush the caches when setting pages not present Andi Kleen
2008-02-11 11:00 ` Ingo Molnar
2008-02-11 12:26 ` Andi Kleen
2008-02-11 9:34 ` [PATCH] [3/8] CPA: Test the correct mapping alias on x86-64 Andi Kleen
2008-02-11 11:49 ` Ingo Molnar
2008-02-11 9:34 ` [PATCH] [4/8] CPA: Fix set_memory_x for ioremap Andi Kleen
2008-02-11 12:27 ` Ingo Molnar
2008-02-11 12:45 ` Andi Kleen
2008-02-11 9:34 ` [PATCH] [5/8] Fix logic error in 64bit memory hotadd Andi Kleen
2008-02-11 12:46 ` Ingo Molnar
2008-02-11 13:05 ` Andi Kleen
2008-02-11 13:33 ` Ingo Molnar
2008-02-11 13:44 ` Andi Kleen
2008-02-12 10:35 ` Yasunori Goto
2008-02-12 11:20 ` Andi Kleen [this message]
2008-02-11 9:34 ` [PATCH] [6/8] Account overlapped mappings in end_pfn_map Andi Kleen
2008-02-11 13:08 ` Ingo Molnar
2008-02-11 13:27 ` Andi Kleen
2008-02-11 13:55 ` Ingo Molnar
2008-02-11 14:16 ` Peter Zijlstra
2008-02-11 14:24 ` Andi Kleen
2008-02-11 14:41 ` Sam Ravnborg
2008-02-11 15:12 ` Arjan van de Ven
2008-02-11 9:34 ` [PATCH] [7/8] Implement true end_pfn_mapped for 32bit Andi Kleen
2008-02-12 19:39 ` Thomas Gleixner
2008-02-12 19:49 ` Andi Kleen
2008-02-12 20:25 ` Thomas Gleixner
2008-02-11 9:34 ` [PATCH] [8/8] RFC: Fix some EFI problems Andi Kleen
2008-02-12 20:04 ` Thomas Gleixner
2008-02-12 20:23 ` Andi Kleen
2008-02-12 20:48 ` Thomas Gleixner
2008-02-13 11:05 ` Andi Kleen
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=200802121220.51755.ak@suse.de \
--to=ak@suse.de \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@elte.hu \
--cc=tglx@linutronix.de \
--cc=y-goto@jp.fujitsu.com \
--subject='Re: [PATCH] [5/8] Fix logic error in 64bit memory hotadd' \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).