on VM_BUG_ON().
>
> This replaces get_order() with order_base_2() (round-up version of ilog2).
>
> Suggested-by: Paul Mackerras
> Cc: Alexander Graf
> Cc: Aneesh Kumar K.V
> Cc: Joonsoo Kim
> Cc: Benjamin Herrenschmidt
> Signed-off-by: Alexey Kardashevskiy
Sorry
On Wed, Jun 18, 2014 at 01:51:44PM -0700, Andrew Morton wrote:
> On Tue, 17 Jun 2014 10:25:07 +0900 Joonsoo Kim wrote:
>
> > > >v2:
> > > > - Although this patchset looks very different with v1, the end result,
> > > > that is, mm/cma.c is same
On Tue, Jun 24, 2014 at 04:36:47PM +1000, Michael Ellerman wrote:
> Commit e58e263 "PPC, KVM, CMA: use general CMA reserved area management
> framework" in next-20140624 removed arch/powerpc/kvm/book3s_hv_cma.c but
> neglected to update the Makefile, thus breaking the build.
>
> Signed-off-by: Mic
On Wed, Jun 18, 2014 at 01:48:15PM -0700, Andrew Morton wrote:
> On Mon, 16 Jun 2014 14:40:46 +0900 Joonsoo Kim wrote:
>
> > PPC KVM's CMA area management requires arbitrary bitmap granularity,
> > since they want to reserve very large memory and manage this region
>
On Mon, Jun 16, 2014 at 03:27:19PM +0900, Minchan Kim wrote:
> Hi, Joonsoo
>
> On Mon, Jun 16, 2014 at 02:40:43PM +0900, Joonsoo Kim wrote:
> > We should free memory for bitmap when we find zone mis-match,
> > otherwise this memory will leak.
> >
> > Additiona
On Mon, Jun 16, 2014 at 11:11:35AM +0200, Marek Szyprowski wrote:
> Hello,
>
> On 2014-06-16 07:40, Joonsoo Kim wrote:
> >Currently, there are two users on CMA functionality, one is the DMA
> >subsystem and the other is the KVM on powerpc. They have their own code
> >
We don't need explicit 'CMA:' prefix, since we already define prefix
'cma:' in pr_fmt. So remove it.
Acked-by: Michal Nazarewicz
Reviewed-by: Zhang Yanfei
Signed-off-by: Joonsoo Kim
diff --git a/mm/cma.c b/mm/cma.c
index 9961120..4b251b0 100644
--- a/mm/cma.c
+++ b/mm
iewed-by: Aneesh Kumar K.V
Signed-off-by: Joonsoo Kim
diff --git a/drivers/base/dma-contiguous.c b/drivers/base/dma-contiguous.c
index 5f62c28..c6eeb2c 100644
--- a/drivers/base/dma-contiguous.c
+++ b/drivers/base/dma-contiguous.c
@@ -38,6 +38,7 @@ struct cma {
unsigned long bas
found this possibility during code-review and, IMO,
this patch isn't suitable for stable tree.
Acked-by: Zhang Yanfei
Reviewed-by: Michal Nazarewicz
Reviewed-by: Aneesh Kumar K.V
Signed-off-by: Joonsoo Kim
diff --git a/drivers/base/dma-contiguous.c b/drivers/base/dma-contiguous.c
index 8
y Ack to patch 6-7.
This patchset is based on linux-next 20140610.
Patch 1-4 prepare some features to cover PPC KVM's requirements.
Patch 5-6 generalize CMA reserved area management code and change users
to use it.
Patch 7-9 clean-up minor things.
Joonsoo Kim (9):
DMA, CMA: fix possible
order->alignment (Minchan)
clear code documentation by Minchan's comment (Minchan)
Acked-by: Michal Nazarewicz
Reviewed-by: Aneesh Kumar K.V
Signed-off-by: Joonsoo Kim
diff --git a/drivers/base/dma-contiguous.c b/drivers/base/dma-contiguous.c
index 9021762..5f62c28 100644
--- a/dri
We can remove one call sites for clear_cma_bitmap() if we first
call it before checking error number.
Acked-by: Minchan Kim
Reviewed-by: Michal Nazarewicz
Reviewed-by: Zhang Yanfei
Reviewed-by: Aneesh Kumar K.V
Signed-off-by: Joonsoo Kim
diff --git a/mm/cma.c b/mm/cma.c
index 0cf50da
ome accessor functions to pass aligned base and size to
dma_contiguous_early_fixup() function
move MAX_CMA_AREAS to cma.h
Acked-by: Michal Nazarewicz
Acked-by: Zhang Yanfei
Acked-by: Minchan Kim
Reviewed-by: Aneesh Kumar K.V
Signed-off-by: Joonsoo Kim
diff --git a/arch/arm/mm/dma-mapping.
Nazarewicz
Acked-by: Paolo Bonzini
Tested-by: Aneesh Kumar K.V
Signed-off-by: Joonsoo Kim
diff --git a/arch/powerpc/kvm/book3s_64_mmu_hv.c
b/arch/powerpc/kvm/book3s_64_mmu_hv.c
index 8056107..a41e625 100644
--- a/arch/powerpc/kvm/book3s_64_mmu_hv.c
+++ b/arch/powerpc/kvm/book3s_64_mmu_hv.c
@@ -37,8
h DMA APIs while extending
core functions.
v3: move decriptions to exporeted APIs (Minchan)
pass aligned base and size to dma_contiguous_early_fixup() (Minchan)
Acked-by: Michal Nazarewicz
Reviewed-by: Aneesh Kumar K.V
Signed-off-by: Joonsoo Kim
diff --git a/drivers/base/dma-contiguou
base' ahead of 'size' (Minchan)
Acked-by: Michal Nazarewicz
Reviewed-by: Aneesh Kumar K.V
Signed-off-by: Joonsoo Kim
diff --git a/arch/powerpc/kvm/book3s_hv_builtin.c
b/arch/powerpc/kvm/book3s_hv_builtin.c
index 3960e0b..6cf498a 100644
--- a/arch/powerpc/kvm/book3s_hv_builtin
On Sat, Jun 14, 2014 at 02:23:59PM +0530, Aneesh Kumar K.V wrote:
> Joonsoo Kim writes:
>
> > Now, we have general CMA reserved area management framework,
> > so use it for future maintainabilty. There is no functional change.
> >
> > Acked-by: Michal Nazarewic
On Sat, Jun 14, 2014 at 12:55:39PM +0530, Aneesh Kumar K.V wrote:
> Joonsoo Kim writes:
>
> > Currently, there are two users on CMA functionality, one is the DMA
> > subsystem and the other is the kvm on powerpc. They have their own code
> > to manage CMA reserved area e
On Sat, Jun 14, 2014 at 03:35:33PM +0530, Aneesh Kumar K.V wrote:
> Joonsoo Kim writes:
>
> > Now, we have general CMA reserved area management framework,
> > so use it for future maintainabilty. There is no functional change.
> >
> > Acked-by: Michal Nazarewic
On Sat, Jun 14, 2014 at 03:46:44PM +0530, Aneesh Kumar K.V wrote:
> Joonsoo Kim writes:
>
> > Currently, there are two users on CMA functionality, one is the DMA
> > subsystem and the other is the kvm on powerpc. They have their own code
> > to manage CMA reserved area e
On Thu, Jun 12, 2014 at 02:37:43PM +0900, Minchan Kim wrote:
> On Thu, Jun 12, 2014 at 12:21:40PM +0900, Joonsoo Kim wrote:
> > To prepare future generalization work on cma area management code,
> > we need to separate core cma management codes from DMA APIs.
> > We w
On Thu, Jun 12, 2014 at 12:19:54PM +0200, Michal Nazarewicz wrote:
> On Thu, Jun 12 2014, Joonsoo Kim wrote:
> > ppc kvm's cma region management requires arbitrary bitmap granularity,
> > since they want to reserve very large memory and manage this region
> > with bitma
On Thu, Jun 12, 2014 at 12:02:38PM +0200, Michal Nazarewicz wrote:
> On Thu, Jun 12 2014, Joonsoo Kim wrote:
> > ppc kvm's cma area management needs alignment constraint on
>
> I've noticed it earlier and cannot seem to get to terms with this. It
> should IMO be PPC,
On Thu, Jun 12, 2014 at 11:53:16AM +0200, Michal Nazarewicz wrote:
> On Thu, Jun 12 2014, Michal Nazarewicz wrote:
> > I used “function(arg1, arg2, …)” at the *beginning* of functions when
> > the arguments passed to the function were included in the message. In
> > all other cases I left it at j
On Thu, Jun 12, 2014 at 04:40:29PM +0900, Minchan Kim wrote:
> On Thu, Jun 12, 2014 at 12:21:47PM +0900, Joonsoo Kim wrote:
> > Currently, we should take the mutex for manipulating bitmap.
> > This job may be really simple and short so we don't need to sleep
> > if co
On Thu, Jun 12, 2014 at 04:19:31PM +0900, Minchan Kim wrote:
> On Thu, Jun 12, 2014 at 12:21:46PM +0900, Joonsoo Kim wrote:
> > Conventionally, we put output param to the end of param list.
> > cma_declare_contiguous() doesn't look like that, so change it.
>
> If you
On Thu, Jun 12, 2014 at 04:13:11PM +0900, Minchan Kim wrote:
> On Thu, Jun 12, 2014 at 12:21:43PM +0900, Joonsoo Kim wrote:
> > Currently, there are two users on CMA functionality, one is the DMA
> > subsystem and the other is the kvm on powerpc. They have their own code
> > t
On Thu, Jun 12, 2014 at 04:08:11PM +0900, Minchan Kim wrote:
> On Thu, Jun 12, 2014 at 12:21:42PM +0900, Joonsoo Kim wrote:
> > ppc kvm's cma region management requires arbitrary bitmap granularity,
> > since they want to reserve very large memory and manage this region
>
On Thu, Jun 12, 2014 at 03:06:10PM +0900, Minchan Kim wrote:
> On Thu, Jun 12, 2014 at 12:21:42PM +0900, Joonsoo Kim wrote:
> > ppc kvm's cma region management requires arbitrary bitmap granularity,
> > since they want to reserve very large memory and manage this region
>
On Thu, Jun 12, 2014 at 02:52:20PM +0900, Minchan Kim wrote:
> On Thu, Jun 12, 2014 at 12:21:41PM +0900, Joonsoo Kim wrote:
> > ppc kvm's cma area management needs alignment constraint on
> > cma region. So support it to prepare generalization of cma area
> >
On Thu, Jun 12, 2014 at 02:25:43PM +0900, Minchan Kim wrote:
> On Thu, Jun 12, 2014 at 12:21:39PM +0900, Joonsoo Kim wrote:
> > We should free memory for bitmap when we find zone mis-match,
> > otherwise this memory will leak.
>
> Then, -stable stuff?
I don't think so.
On Thu, Jun 12, 2014 at 02:18:53PM +0900, Minchan Kim wrote:
> Hi Joonsoo,
>
> On Thu, Jun 12, 2014 at 12:21:38PM +0900, Joonsoo Kim wrote:
> > We don't need explicit 'CMA:' prefix, since we already define prefix
> > 'cma:' in pr_fmt. So remove it.
&
On Thu, Jun 12, 2014 at 10:11:19AM +0530, Aneesh Kumar K.V wrote:
> Joonsoo Kim writes:
>
> > We don't need explicit 'CMA:' prefix, since we already define prefix
> > 'cma:' in pr_fmt. So remove it.
> >
> > And, some logs print function
We should free memory for bitmap when we find zone mis-match,
otherwise this memory will leak.
Additionally, I copy code comment from ppc kvm's cma code to notify
why we need to check zone mis-match.
Signed-off-by: Joonsoo Kim
diff --git a/drivers/base/dma-contiguous.c b/drivers/bas
ff-by: Joonsoo Kim
diff --git a/drivers/base/dma-contiguous.c b/drivers/base/dma-contiguous.c
index bc4c171..9bc9340 100644
--- a/drivers/base/dma-contiguous.c
+++ b/drivers/base/dma-contiguous.c
@@ -38,6 +38,7 @@ struct cma {
unsigned long base_pfn;
unsigned long
debug log on cma_activate_area().
Signed-off-by: Joonsoo Kim
diff --git a/drivers/base/dma-contiguous.c b/drivers/base/dma-contiguous.c
index 83969f8..bd0bb81 100644
--- a/drivers/base/dma-contiguous.c
+++ b/drivers/base/dma-contiguous.c
@@ -144,7 +144,7 @@ void __init dma_contig
m/cma.c is same with v1's one. So I carry Ack to patch 6-7.
Patch 1-5 prepare some features to cover ppc kvm's requirements.
Patch 6-7 generalize CMA reserved area management code and change users
to use it.
Patch 8-10 clean-up minor things.
Joonsoo Kim (10):
DMA, CMA: clean-up log m
Now, we have general CMA reserved area management framework,
so use it for future maintainabilty. There is no functional change.
Acked-by: Michal Nazarewicz
Acked-by: Paolo Bonzini
Signed-off-by: Joonsoo Kim
diff --git a/arch/powerpc/kvm/book3s_hv_builtin.c
b/arch/powerpc/kvm
Conventionally, we put output param to the end of param list.
cma_declare_contiguous() doesn't look like that, so change it.
Additionally, move down cma_areas reference code to the position
where it is really needed.
Signed-off-by: Joonsoo Kim
diff --git a/arch/powerpc/kvm/book3s_hv_buil
We can remove one call sites for clear_cma_bitmap() if we first
call it before checking error number.
Signed-off-by: Joonsoo Kim
diff --git a/mm/cma.c b/mm/cma.c
index 1e1b017..01a0713 100644
--- a/mm/cma.c
+++ b/mm/cma.c
@@ -282,11 +282,12 @@ struct page *cma_alloc(struct cma *cma, int count
Currently, we should take the mutex for manipulating bitmap.
This job may be really simple and short so we don't need to sleep
if contended. So I change it to spinlock.
Signed-off-by: Joonsoo Kim
diff --git a/mm/cma.c b/mm/cma.c
index 22a5b23..3085e8c 100644
--- a/mm/cma.c
+++ b/mm/
agement and now it's time to do it. This patch
moves core functions to mm/cma.c and change DMA APIs to use
these functions.
There is no functional change in DMA APIs.
v2: There is no big change from v1 in mm/cma.c. Mostly renaming.
Acked-by: Michal Nazarewicz
Signed-off-by: Joonsoo Kim
h DMA APIs while extending
core functions.
Signed-off-by: Joonsoo Kim
diff --git a/drivers/base/dma-contiguous.c b/drivers/base/dma-contiguous.c
index fb0cdce..8a44c82 100644
--- a/drivers/base/dma-contiguous.c
+++ b/drivers/base/dma-contiguous.c
@@ -231,9 +231,9 @@ core_initcall(cma_init_reserved_
ppc kvm's cma area management needs alignment constraint on
cma region. So support it to prepare generalization of cma area
management functionality.
Additionally, add some comments which tell us why alignment
constraint is needed on cma region.
Signed-off-by: Joonsoo Kim
diff --git a/dr
On Thu, Jun 05, 2014 at 11:09:05PM +0530, Aneesh Kumar K.V wrote:
> Joonsoo Kim writes:
>
> > Currently, there are two users on CMA functionality, one is the DMA
> > subsystem and the other is the kvm on powerpc. They have their own code
> > to manage CMA reserved area e
On Tue, Jun 03, 2014 at 09:00:48AM +0200, Michal Nazarewicz wrote:
> On Tue, Jun 03 2014, Joonsoo Kim wrote:
> > Now, we have general CMA reserved area management framework,
> > so use it for future maintainabilty. There is no functional change.
> >
> > Signed-off-by:
On Tue, Jun 03, 2014 at 08:56:00AM +0200, Michal Nazarewicz wrote:
> On Tue, Jun 03 2014, Joonsoo Kim wrote:
> > Currently, there are two users on CMA functionality, one is the DMA
> > subsystem and the other is the kvm on powerpc. They have their own code
> > to manage CMA
from people who related to this stuff before actually
trying to merge this patchset. If all agree with this change, I will
resend it after rc1.
Thanks.
Joonsoo Kim (3):
CMA: generalize CMA reserved area management functionality
DMA, CMA: use general CMA reserved area management framework
P
ead through
this patch.
This change could also help developer who want to use CMA in their
new feature development, since they can use CMA easily without
copying & pasting this reserved area management code.
Signed-off-by: Joonsoo Kim
diff --git a/drivers/base/Kconfig b/drivers/base/Kconfi
Now, we have general CMA reserved area management framework,
so use it for future maintainabilty. There is no functional change.
Signed-off-by: Joonsoo Kim
diff --git a/drivers/base/Kconfig b/drivers/base/Kconfig
index b3fe1cc..4eac559 100644
--- a/drivers/base/Kconfig
+++ b/drivers/base
Now, we have general CMA reserved area management framework,
so use it for future maintainabilty. There is no functional change.
Signed-off-by: Joonsoo Kim
diff --git a/arch/powerpc/kvm/book3s_hv_builtin.c
b/arch/powerpc/kvm/book3s_hv_builtin.c
index 8cd0dae..43c3f81 100644
--- a/arch/powerpc
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