From: Wen Congyang
This patch introduces a new function try_offline_node() to
remove sysfs file of node when all memory sections of this
node are removed. If some memory sections of this node are
not removed, this function does nothing.
CC: David Rientjes
CC: Jiang Liu
CC: Len Brown
CC: Chris
When a memory is added, we update zone's and pgdat's start_pfn and
spanned_pages in the function __add_zone(). So we should revert them
when the memory is removed.
The patch adds a new function __remove_zone() to do this.
CC: David Rientjes
CC: Jiang Liu
CC: Len Brown
CC: Christoph Lameter
Cc
From: Wen Congyang
For hot removing memory, we sholud remove page table about the memory.
So the patch searches a page table about the removed memory, and clear
page table.
CC: David Rientjes
CC: Jiang Liu
CC: Len Brown
CC: Christoph Lameter
Cc: Minchan Kim
CC: Andrew Morton
CC: KOSAKI Mot
All pages of virtual mapping in removed memory cannot be freed, since some pages
used as PGD/PUD includes not only removed memory but also other memory. So the
patch checks whether page can be freed or not.
How to check whether page can be freed or not?
1. When removing memory, the page structs o
For removing memmap region of sparse-vmemmap which is allocated bootmem,
memmap region of sparse-vmemmap needs to be registered by get_page_bootmem().
So the patch searches pages of virtual mapping and registers the pages by
get_page_bootmem().
Note: register_page_bootmem_memmap() is not implement
The function get_page_bootmem() may be called more than one time to the same
page. There is no need to set page's type, private if the function is not
the first time called to the page.
Note: the patch is just optimization and does not fix any problem.
CC: David Rientjes
CC: Jiang Liu
CC: Len B
Currently __remove_section for SPARSEMEM_VMEMMAP does nothing. But even if
we use SPARSEMEM_VMEMMAP, we can unregister the memory_section.
So the patch add unregister_memory_section() into __remove_section().
CC: David Rientjes
CC: Jiang Liu
CC: Len Brown
CC: Christoph Lameter
Cc: Minchan Kim
From: Wen Congyang
For removing memory, we need to remove page table. But it depends
on architecture. So the patch introduce arch_remove_memory() for
removing page table. Now it only calls __remove_pages().
Note: __remove_pages() for some archtecuture is not implemented
(I don't know how t
When (hot)adding memory into system, /sys/firmware/memmap/X/{end, start, type}
sysfs files are created. But there is no code to remove these files. The patch
implements the function to remove them.
Note : The code does not free firmware_map_entry since there is no way to free
memory which i
When calling remove_memory(), the memory should be offline. If the function
is used to online memory, kernel panic may occur.
So the patch checks whether memory is offline or not.
CC: David Rientjes
CC: Jiang Liu
CC: Len Brown
CC: Christoph Lameter
Cc: Minchan Kim
CC: Andrew Morton
CC: KOSA
The patch-set was divided from following thread's patch-set.
https://lkml.org/lkml/2012/9/5/201
If you want to know the reason, please read following thread.
https://lkml.org/lkml/2012/10/2/83
The patch-set has only the function of kernel core side for physical
memory hot remove. So if you use
On Wed, October 03, 2012 6:36 PM
Andrew Morton wrote:
>
> On Wed, 3 Oct 2012 15:18:43 -0400
> Alexandre Bounine wrote:
>
> > ...
> >
> > +static u16 rio_destid_alloc(struct rio_net *net)
> > +{
> > + int destid;
> > + struct rio_id_table *idtab = &net->destid_table;
> > +
> > + spin_lock
On Thu, 2012-10-04 at 09:02 -0700, Linus Torvalds wrote:
> Hmm. There's nothing there.
>
> Did you mean for me to pull some branch/tag you didn't mention?
Heh, yeah, the mirrors hadn't updated yet so git request-pull didn't put
the branch name in. It's common but I usually fix it up by hand. Sinc
On Thu, 2012-10-04 at 09:00 -0700, Linus Torvalds wrote:
> So this happens if you have "reverse merges" (ie you've pulled my
> tree, or some other tree I've pulled), and there is no longer a single
> clear common point that you started from. In that case, there is no
> simple diff for the "what has
Can you merge the following branch into the powerpc tree please.
This is to complete part of the UAPI disintegration for which the preparatory
patches were pulled recently.
Note that there are some fixup patches which are at the base of the branch
aimed at you, plus all arches get the asm-generic
On Wed, October 03, 2012 6:30 PM
Andrew Morton wrote:
>
> On Wed, 3 Oct 2012 15:18:41 -0400
> Alexandre Bounine wrote:
>
> > ...
> >
> > +static void __devinit disc_work_handler(struct work_struct *_work)
> > +{
> > + struct rio_disc_work *work = container_of(_work,
> > +
On PPC the ELF PLT sections look like this:
[17] .sbss NOBITS 0002aff8 01aff8 14 00 WA 0 0 4
[18] .plt NOBITS 0002b00c 01aff8 84 00 WAX 0 0 4
[19] .bss NOBITS 0002b090 01aff8 a4 00 WA 0 0 4
Which resu
On Wed, October 03, 2012 6:20 PM
Andrew Morton wrote:
>
> On Wed, 3 Oct 2012 15:18:39 -0400
> Alexandre Bounine wrote:
>
> > Fix blocking wait loop in the RapidIO discovery routine to avoid
> > warning dumps about stalled CPU on x86 platforms.
> >
> > ...
> >
> > + to_end = jiffies +
On Thu, Oct 04, 2012 at 09:19:04PM +1000, Benjamin Herrenschmidt wrote:
> On Sun, 2012-09-30 at 17:28 -0600, Jason Gunthorpe wrote:
> > asm/page.h discusses the calculation for v2p and p2v, it should be:
> > va = pa + KERNELBASE - PHYSICAL_START
> > which is the same as:
> > va = pa + LOAD_OFFSET
> -Original Message-
> From: Kumar Gala [mailto:ga...@kernel.crashing.org]
> Sent: Wednesday, September 19, 2012 7:20 PM
> To: Sethi Varun-B16395
> Cc: io...@lists.linux-foundation.org; joerg.roe...@amd.com; linux-
> ker...@vger.kernel.org; linuxppc-dev@lists.ozlabs.org; Sethi Varun-B1639
> -Original Message-
> From: Kumar Gala [mailto:ga...@kernel.crashing.org]
> Sent: Thursday, October 04, 2012 6:47 PM
> To: Sethi Varun-B16395
> Cc: joerg.roe...@amd.com; io...@lists.linux-foundation.org; linuxppc-
> d...@lists.ozlabs.org; linux-ker...@vger.kernel.org; Sethi Varun-B16395
On Thu, Oct 4, 2012 at 1:38 AM, Benjamin Herrenschmidt
wrote:
>
> The following changes since commit 271fd03a3013b106ccc178d54219c1be0c9759b7:
>
> powerpc/powernv: I/O and memory alignment for P2P bridges (2012-09-11
> 16:59:47 -0600)
>
> are available in the git repository at:
>
> git://git.
On Thu, Oct 4, 2012 at 1:38 AM, Benjamin Herrenschmidt
wrote:
>
> First, however, a note about the pull request details ... the diffstat looks
> completely on crack, any idea what's up ? It sees piles of files modified
> in various other archs & generic code but I see no patch in that branch
> tha
On Oct 4, 2012, at 6:56 AM, wrote:
> From: Varun Sethi
>
> Following is a brief description of the PAMU hardware:
> PAMU determines what action to take and whether to authorize the action on
> the basis
> of the memory address, a Logical IO Device Number (LIODN), and PAACT table
> (logicall
On Oct 4, 2012, at 6:56 AM, wrote:
> From: Varun Sethi
>
> Added the following domain attributes required by FSL PAMU driver:
> 1. Subwindows field added to the iommu domain geometry attribute.
> 2. Added new iommu stash attribute, which allows setting of the
> LIODN specific stash id param
On Oct 4, 2012, at 7:24 AM, Davide Viti wrote:
> Hi,
> it turns out that if define CONFIG_PCI_NOSCAN in u-boot (as per [1]), the
> devide behind the second controller is detected by the Linux kernel.
>
> Would
> you suggest any particular patch I should apply to fix this (I'm using kernel
>
Hi,
it turns out that if define CONFIG_PCI_NOSCAN in u-boot (as per [1]), the
devide behind the second controller is detected by the Linux kernel.
Would
you suggest any particular patch I should apply to fix this (I'm using kernel
2.6.34)
thanx alot in advance
Davide
[1] http://permalink.gma
From: Varun Sethi
Added the following domain attributes required by FSL PAMU driver:
1. Subwindows field added to the iommu domain geometry attribute.
2. Added new iommu stash attribute, which allows setting of the
LIODN specific stash id parameter through IOMMU API.
3. Added an attribute for
From: Varun Sethi
This patchset provides the Freescale PAMU (Peripheral Access Management Unit)
driver
and the corresponding IOMMU API implementation. PAMU is the IOMMU present on
Freescale
QorIQ platforms. PAMU can authorize memory access, remap the memory address,
and remap
the I/O transact
From: Varun Sethi
Add a new field in the device (powerpc) archdata structure for storing iommu
domain
information pointer. This pointer is stored when the device is attached to a
particular
domain.
Signed-off-by: Varun Sethi
---
arch/powerpc/include/asm/device.h |4
1 files changed,
On Sun, 2012-09-30 at 17:28 -0600, Jason Gunthorpe wrote:
> asm/page.h discusses the calculation for v2p and p2v, it should be:
> va = pa + KERNELBASE - PHYSICAL_START
> which is the same as:
> va = pa + LOAD_OFFSET
>
> tophys/tovirt were using PAGE_OFFSET, which as page.h says, is almost
> alwa
On Sun, 2012-09-30 at 17:27 -0600, Jason Gunthorpe wrote:
> diff --git a/arch/powerpc/kernel/head_40x.S b/arch/powerpc/kernel/head_40x.S
> index 4989661..7edd7b1 100644
> --- a/arch/powerpc/kernel/head_40x.S
> +++ b/arch/powerpc/kernel/head_40x.S
> @@ -431,29 +431,19 @@ label:
>
> /* 0x1000 - Pr
Hi Anton,
On 04.10.2012, at 06:57, Anton Blanchard wrote:
>
> Hi Alex,
>
> Looks to be a preempt issue with the iommu pools code. I did find a
> couple more bugs along the way too.
>
> Anton
> --
>
> There are a number of issues in the recent IOMMU pools code:
>
> - On a preempt kernel we mi
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