debugfs currently lack the ability to create attributes
that set/get atomic_t values.
This patch adds support for this through a new
debugfs_create_atomic_t() function.
Signed-off-by: Seth Jennings sjenn...@linux.vnet.ibm.com
Acked-by: Greg Kroah-Hartman gre...@linuxfoundation.org
Acked-by: Mel
-53%
%CPU utilization (out of 400% on 4 cpus)
N basezswap %change
8 317 319 1%
12 267 311 16%
16 179 191 7%
20 94 143 52%
24 60 128 113%
Seth Jennings (4):
debugfs: add get/set for atomic types
zbud: add to mm
be moved out
of zswap to the swap device so newer pages can be compressed and stored in
zswap.
This patch adds the zswap driver to mm/
Signed-off-by: Seth Jennings sjenn...@linux.vnet.ibm.com
Acked-by: Rik van Riel r...@redhat.com
---
mm/Kconfig | 20 ++
mm/Makefile |1 +
mm/zswap.c | 943
This patch adds the documentation file for the zswap functionality
Signed-off-by: Seth Jennings sjenn...@linux.vnet.ibm.com
Acked-by: Rik van Riel r...@redhat.com
---
Documentation/vm/zswap.txt | 68
1 file changed, 68 insertions(+)
create mode
elements that were ingrained throughout
and provide a generic allocation interface that can later be used by
zsmalloc and others.
This patch adds zbud to mm/ for later use by zswap.
Signed-off-by: Seth Jennings sjenn...@linux.vnet.ibm.com
Acked-by: Rik van Riel r...@redhat.com
---
include/linux
On Wed, May 29, 2013 at 02:29:04PM -0700, Andrew Morton wrote:
On Wed, 29 May 2013 14:09:02 -0700 (PDT) Dan Magenheimer
dan.magenhei...@oracle.com wrote:
memory_failure() is merely an example of a general problem: code which
reads from the memmap[] array and expects its elements to be
Andrew, Mel,
This struct page stuffing is taking a lot of time to work out and _might_ be
fraught with peril when memmap peekers are considered.
What do you think about just storing the zbud page metadata inline in the
memory page in the first zbud page chunk?
Mel, this kinda hurts you plans
On Tue, May 28, 2013 at 02:59:18PM -0700, Andrew Morton wrote:
On Mon, 20 May 2013 11:26:07 -0500 Seth Jennings
sjenn...@linux.vnet.ibm.com wrote:
zswap is a thin backend for frontswap that takes pages that are in the
process
of being swapped out and attempts to compress them and store
On Tue, May 28, 2013 at 02:59:11PM -0700, Andrew Morton wrote:
On Mon, 20 May 2013 11:26:06 -0500 Seth Jennings
sjenn...@linux.vnet.ibm.com wrote:
zbud is an special purpose allocator for storing compressed pages. It is
designed to store up to two compressed pages per physical page
On Wed, May 29, 2013 at 11:29:29AM -0700, Andrew Morton wrote:
On Wed, 29 May 2013 09:57:20 -0500 Seth Jennings
sjenn...@linux.vnet.ibm.com wrote:
+/*
+* helpers
+**/
+static inline bool zswap_is_full(void
On Wed, May 29, 2013 at 12:57:47PM -0700, Andrew Morton wrote:
On Wed, 29 May 2013 14:50:27 -0500 Seth Jennings
sjenn...@linux.vnet.ibm.com wrote:
On Wed, May 29, 2013 at 11:29:29AM -0700, Andrew Morton wrote:
On Wed, 29 May 2013 09:57:20 -0500 Seth Jennings
sjenn
On Mon, May 20, 2013 at 02:54:39PM +0100, Mel Gorman wrote:
On Sun, May 19, 2013 at 03:52:19PM -0500, Seth Jennings wrote:
My first guess is that the external fragmentation situation you are
referring to
is a workload in which all pages compress to greater than half a page. If
so
191 179 -6%
20 371 240 -35%
24 570 267 -53%
%CPU utilization (out of 400% on 4 cpus)
N basezswap %change
8 317 319 1%
12 267 311 16%
16 179 191 7%
20 94 143 52%
24 60 128 113%
Seth
elements that were ingrained throughout
and provide a generic allocation interface that can later be used by
zsmalloc and others.
This patch adds zbud to mm/ for later use by zswap.
Signed-off-by: Seth Jennings sjenn...@linux.vnet.ibm.com
Acked-by: Rik van Riel r...@redhat.com
---
include/linux
debugfs currently lack the ability to create attributes
that set/get atomic_t values.
This patch adds support for this through a new
debugfs_create_atomic_t() function.
Signed-off-by: Seth Jennings sjenn...@linux.vnet.ibm.com
Acked-by: Greg Kroah-Hartman gre...@linuxfoundation.org
Acked-by: Mel
be moved out
of zswap to the swap device so newer pages can be compressed and stored in
zswap.
This patch adds the zswap driver to mm/
Signed-off-by: Seth Jennings sjenn...@linux.vnet.ibm.com
Acked-by: Rik van Riel r...@redhat.com
---
mm/Kconfig | 22 +-
mm/Makefile | 1 +
mm/zswap.c | 947
This patch adds the documentation file for the zswap functionality
Signed-off-by: Seth Jennings sjenn...@linux.vnet.ibm.com
Acked-by: Rik van Riel r...@redhat.com
---
Documentation/vm/zswap.txt | 68 ++
1 file changed, 68 insertions(+)
create mode
On Fri, May 17, 2013 at 04:48:37PM +0100, Mel Gorman wrote:
On Mon, May 13, 2013 at 07:40:01AM -0500, Seth Jennings wrote:
zbud is an special purpose allocator for storing compressed pages. It is
designed to store up to two compressed pages per physical page. While this
design limits
On Fri, May 17, 2013 at 05:54:18PM +0100, Mel Gorman wrote:
On Mon, May 13, 2013 at 07:40:02AM -0500, Seth Jennings wrote:
zswap is a thin compression backend for frontswap. It receives pages from
frontswap and attempts to store them in a compressed memory pool, resulting
in
an effective
On Wed, May 15, 2013 at 02:55:06PM -0400, Konrad Rzeszutek Wilk wrote:
Sorry, but I don't think that's appropriate for a patch in the MM subsystem.
I am heading to the airport shortly so this email is a bit hastily typed.
Perhaps a compromise can be reached where this code is merged as a
On Tue, May 14, 2013 at 05:19:19PM +0800, Bob Liu wrote:
Hi Seth,
Hi Bob, thanks for the review!
On 05/13/2013 08:40 PM, Seth Jennings wrote:
zswap is a thin compression backend for frontswap. It receives pages from
frontswap and attempts to store them in a compressed memory pool
On Mon, May 13, 2013 at 03:31:42PM -0700, Dan Magenheimer wrote:
From: Seth Jennings [mailto:sjenn...@linux.vnet.ibm.com]
Subject: [PATCHv11 3/4] zswap: add to mm/
zswap is a thin compression backend for frontswap. It receives pages from
frontswap and attempts to store them
On Tue, May 14, 2013 at 04:47:24PM +0800, Bob Liu wrote:
Hi Seth,
On 05/13/2013 08:40 PM, Seth Jennings wrote:
zbud is an special purpose allocator for storing compressed pages. It is
designed to store up to two compressed pages per physical page. While this
design limits storage
On Tue, May 14, 2013 at 09:37:08AM -0700, Dan Magenheimer wrote:
From: Seth Jennings [mailto:sjenn...@linux.vnet.ibm.com]
Subject: Re: [PATCHv11 3/4] zswap: add to mm/
On Tue, May 14, 2013 at 05:19:19PM +0800, Bob Liu wrote:
Hi Seth,
Hi Bob, thanks for the review
On Tue, May 14, 2013 at 01:18:48PM -0700, Dan Magenheimer wrote:
From: Seth Jennings [mailto:sjenn...@linux.vnet.ibm.com]
Subject: Re: [PATCHv11 3/4] zswap: add to mm/
snip
+/* The maximum percentage of memory that the compressed pool can
occupy */
+static unsigned int
that zbud can never do
harm by using more pages to store zpages than the uncompressed zpages would
have used on their own.
This patch adds zbud to mm/ for later use by zswap.
Signed-off-by: Seth Jennings sjenn...@linux.vnet.ibm.com
---
include/linux/zbud.h | 22 ++
mm/Kconfig | 10
a true cache in that, once the cache is full or can't
grow due to memory pressure, the oldest pages can be moved out of zswap to the
swap device so newer pages can be compressed and stored in zswap.
This patch adds the zswap driver to mm/
Signed-off-by: Seth Jennings sjenn...@linux.vnet.ibm.com
This patch adds the documentation file for the zswap functionality
Signed-off-by: Seth Jennings sjenn...@linux.vnet.ibm.com
---
Documentation/vm/zswap.txt | 72
1 file changed, 72 insertions(+)
create mode 100644 Documentation/vm/zswap.txt
diff
basezswap %change
8 317 319 1%
12 267 311 16%
16 179 191 7%
20 94 143 52%
24 60 128 113%
Seth Jennings (4):
debugfs: add get/set for atomic types
zbud: add to mm/
zswap: add to mm/
zswap: add documentation
debugfs currently lack the ability to create attributes
that set/get atomic_t values.
This patch adds support for this through a new
debugfs_create_atomic_t() function.
Signed-off-by: Seth Jennings sjenn...@linux.vnet.ibm.com
Acked-by: Greg Kroah-Hartman gre...@linuxfoundation.org
Acked-by: Mel
On Mon, May 13, 2013 at 08:43:36AM -0700, Dan Magenheimer wrote:
From: Seth Jennings [mailto:sjenn...@linux.vnet.ibm.com]
Sent: Monday, May 13, 2013 6:40 AM
Subject: [PATCHv11 2/4] zbud: add to mm/
One comment about a questionable algorithm change (vs my original zbud code)
below... I'll
On Thu, May 09, 2013 at 11:58:49AM -0700, Greg Thelen wrote:
On Wed, May 08 2013, Seth Jennings wrote:
debugfs currently lack the ability to create attributes
that set/get atomic_t values.
This patch adds support for this through a new
debugfs_create_atomic_t() function.
Signed
317 319 1%
12 267 311 16%
16 179 191 7%
20 94 143 52%
24 60 128 113%
Seth Jennings (4):
debugfs: add get/set for atomic types
zbud: add to mm/
zswap: add to mm/
zswap: add documentation
Documentation/vm/zswap.txt | 72
a true cache in that, once the cache is full or can't
grow due to memory pressure, the oldest pages can be moved out of zswap to the
swap device so newer pages can be compressed and stored in zswap.
This patch adds the zswap driver to mm/
Signed-off-by: Seth Jennings sjenn...@linux.vnet.ibm.com
This patch adds the documentation file for the zswap functionality
Signed-off-by: Seth Jennings sjenn...@linux.vnet.ibm.com
---
Documentation/vm/zswap.txt | 72 ++
1 file changed, 72 insertions(+)
create mode 100644 Documentation/vm/zswap.txt
diff
that zbud can never do
harm by using more pages to store zpages than the uncompressed zpages would
have used on their own.
This patch adds zbud to mm/ for later use by zswap.
Signed-off-by: Seth Jennings sjenn...@linux.vnet.ibm.com
---
include/linux/zbud.h | 22 ++
mm/Kconfig | 10
On Sun, Apr 14, 2013 at 01:45:28AM +0100, Mel Gorman wrote:
On Wed, Apr 10, 2013 at 01:18:59PM -0500, Seth Jennings wrote:
This patch adds support for evicting swap pages that are currently
compressed in zswap to the swap device. This functionality is very
important and make zswap a true
On Sun, Apr 14, 2013 at 01:45:06AM +0100, Mel Gorman wrote:
On Wed, Apr 10, 2013 at 01:18:56PM -0500, Seth Jennings wrote:
zswap is a thin compression backend for frontswap. It receives
pages from frontswap and attempts to store them in a compressed
memory pool, resulting in an effective
any of that then sorry.
Great! That means you'll have the most fresh perspective :)
I very much appreciate you taking your valuable time to understand and review
the code!
On Wed, Apr 10, 2013 at 01:18:53PM -0500, Seth Jennings wrote:
SNIP
Also, zsmalloc allows objects to span page
94 143 52%
24 60 128 113%
Seth Jennings (8):
zsmalloc: add to mm/
zsmalloc: add documentation
debugfs: add get/set for atomic types
zswap: add to mm/
mm: break up swap_writepage() for frontswap backends
mm: allow for outstanding swap writeback accounting
noncontigious pages.
zsmalloc fulfills the allocation needs for zram and zswap.
Acked-by: Nitin Gupta ngu...@vflare.org
Acked-by: Minchan Kim minc...@kernel.org
Signed-off-by: Seth Jennings sjenn...@linux.vnet.ibm.com
---
include/linux/zsmalloc.h | 56 +++
mm/Kconfig | 24 +
mm
is to be resumed can be added to the swap cache.
Acked-by: Minchan Kim minc...@kernel.org
Signed-off-by: Seth Jennings sjenn...@linux.vnet.ibm.com
---
include/linux/swap.h | 2 ++
mm/page_io.c | 16 +---
mm/swap_state.c | 2 +-
3 files changed, 16 insertions(+), 4 deletions
code path is operating on it.
Signed-off-by: Seth Jennings sjenn...@linux.vnet.ibm.com
---
mm/zswap.c | 530 ++---
1 file changed, 508 insertions(+), 22 deletions(-)
diff --git a/mm/zswap.c b/mm/zswap.c
index db283c4..edb354b 100644
--- a/mm
debugfs currently lack the ability to create attributes
that set/get atomic_t values.
This patch adds support for this through a new
debugfs_create_atomic_t() function.
Acked-by: Greg Kroah-Hartman gre...@linuxfoundation.org
Signed-off-by: Seth Jennings sjenn...@linux.vnet.ibm.com
---
fs
this
compressed store much more quickly than reading from tradition
swap devices resulting in faster performance for many workloads.
This patch adds the zswap driver to mm/
Signed-off-by: Seth Jennings sjenn...@linux.vnet.ibm.com
---
mm/Kconfig | 15 ++
mm/Makefile | 1 +
mm/zswap.c | 665
This patch adds the documentation file for the zswap functionality
Signed-off-by: Seth Jennings sjenn...@linux.vnet.ibm.com
---
Documentation/vm/zsmalloc.txt | 2 +-
Documentation/vm/zswap.txt| 82 +++
2 files changed, 83 insertions(+), 1 deletion
This patch adds a documentation file for zsmalloc at
Documentation/vm/zsmalloc.txt
Signed-off-by: Seth Jennings sjenn...@linux.vnet.ibm.com
---
Documentation/vm/zsmalloc.txt | 68 +++
1 file changed, 68 insertions(+)
create mode 100644 Documentation/vm
the accounting is done.
Acked-by: Minchan Kim minc...@kernel.org
Signed-off-by: Seth Jennings sjenn...@linux.vnet.ibm.com
---
include/linux/swap.h | 4 +++-
mm/page_io.c | 12 +++-
2 files changed, 10 insertions(+), 6 deletions(-)
diff --git a/include/linux/swap.h b/include/linux
14352%
2460128113%
Seth Jennings (8):
zsmalloc: add to mm/
zsmalloc: add documentation
debugfs: add get/set for atomic types
zswap: add to mm/
mm: break up swap_writepage() for frontswap backends
mm: allow for outstanding swap writeback accounting
noncontigious pages.
zsmalloc fulfills the allocation needs for zram and zswap.
Acked-by: Nitin Gupta ngu...@vflare.org
Acked-by: Minchan Kim minc...@kernel.org
Signed-off-by: Seth Jennings sjenn...@linux.vnet.ibm.com
---
include/linux/zsmalloc.h | 56 +++
mm/Kconfig | 24 +
mm
debugfs currently lack the ability to create attributes
that set/get atomic_t values.
This patch adds support for this through a new
debugfs_create_atomic_t() function.
Acked-by: Greg Kroah-Hartman gre...@linuxfoundation.org
Signed-off-by: Seth Jennings sjenn...@linux.vnet.ibm.com
---
fs
this
compressed store much more quickly than reading from tradition
swap devices resulting in faster performance for many workloads.
This patch adds the zswap driver to mm/
Signed-off-by: Seth Jennings sjenn...@linux.vnet.ibm.com
---
mm/Kconfig | 15 ++
mm/Makefile | 1 +
mm/zswap.c | 665
code path is operating on it.
Signed-off-by: Seth Jennings sjenn...@linux.vnet.ibm.com
---
mm/zswap.c | 532 ++---
1 file changed, 510 insertions(+), 22 deletions(-)
diff --git a/mm/zswap.c b/mm/zswap.c
index db283c4..ecdb835 100644
--- a/mm
is to be resumed can be added to the swap cache.
Acked-by: Minchan Kim minc...@kernel.org
Signed-off-by: Seth Jennings sjenn...@linux.vnet.ibm.com
---
include/linux/swap.h | 2 ++
mm/page_io.c | 16 +---
mm/swap_state.c | 2 +-
3 files changed, 16 insertions(+), 4 deletions
the accounting is done.
Acked-by: Minchan Kim minc...@kernel.org
Signed-off-by: Seth Jennings sjenn...@linux.vnet.ibm.com
---
include/linux/swap.h | 4 +++-
mm/page_io.c | 12 +++-
2 files changed, 10 insertions(+), 6 deletions(-)
diff --git a/include/linux/swap.h b/include/linux
This patch adds the documentation file for the zswap functionality
Signed-off-by: Seth Jennings sjenn...@linux.vnet.ibm.com
---
Documentation/vm/zswap.txt | 82 ++
1 file changed, 82 insertions(+)
create mode 100644 Documentation/vm/zswap.txt
diff
This patch adds a documentation file for zsmalloc at
Documentation/vm/zsmalloc.txt
Signed-off-by: Seth Jennings sjenn...@linux.vnet.ibm.com
---
Documentation/vm/zsmalloc.txt | 68 +++
1 file changed, 68 insertions(+)
create mode 100644 Documentation/vm
On 04/04/2013 05:10 PM, Seth Jennings wrote:
swap_writepage() is currently where frontswap hooks into the swap
write path to capture pages with the frontswap_store() function.
However, if a frontswap backend wants to resume the writeback of
a page to the swap device, it can't call
On 03/07/2013 01:00 PM, Dave Hansen wrote:
On 03/06/2013 07:52 AM, Seth Jennings wrote:
+static int __zswap_cpu_notifier(unsigned long action, unsigned long cpu)
+{
+struct crypto_comp *tfm;
+u8 *dst;
+
+switch (action) {
+case CPU_UP_PREPARE:
+tfm
128 113%
Seth Jennings (8):
zsmalloc: add to mm/
zsmalloc: add documentation
debugfs: add get/set for atomic types
zswap: add to mm/
mm: break up swap_writepage() for frontswap backends
mm: allow for outstanding swap writeback accounting
zswap: add swap page writeback support
is to be resumed can be added to the swap cache.
Acked-by: Minchan Kim minc...@kernel.org
Signed-off-by: Seth Jennings sjenn...@linux.vnet.ibm.com
---
include/linux/swap.h | 2 ++
mm/page_io.c | 16 +---
mm/swap_state.c | 2 +-
3 files changed, 16 insertions(+), 4 deletions
debugfs currently lack the ability to create attributes
that set/get atomic_t values.
This patch adds support for this through a new
debugfs_create_atomic_t() function.
Acked-by: Greg Kroah-Hartman gre...@linuxfoundation.org
Signed-off-by: Seth Jennings sjenn...@linux.vnet.ibm.com
---
fs
the accounting is done.
Acked-by: Minchan Kim minc...@kernel.org
Signed-off-by: Seth Jennings sjenn...@linux.vnet.ibm.com
---
include/linux/swap.h | 4 +++-
mm/page_io.c | 12 +++-
2 files changed, 10 insertions(+), 6 deletions(-)
diff --git a/include/linux/swap.h b/include/linux
This patch adds a documentation file for zsmalloc at
Documentation/vm/zsmalloc.txt
Signed-off-by: Seth Jennings sjenn...@linux.vnet.ibm.com
---
Documentation/vm/zsmalloc.txt | 68 +++
1 file changed, 68 insertions(+)
create mode 100644 Documentation/vm
code path is operating on it.
Signed-off-by: Seth Jennings sjenn...@linux.vnet.ibm.com
---
mm/zswap.c | 532 ++---
1 file changed, 512 insertions(+), 20 deletions(-)
diff --git a/mm/zswap.c b/mm/zswap.c
index d777e63..9b86ad9 100644
--- a/mm
noncontigious pages.
zsmalloc fulfills the allocation needs for zram and zswap.
Acked-by: Nitin Gupta ngu...@vflare.org
Acked-by: Minchan Kim minc...@kernel.org
Signed-off-by: Seth Jennings sjenn...@linux.vnet.ibm.com
---
include/linux/zsmalloc.h | 56 +++
mm/Kconfig | 24 +
mm
this
compressed store much more quickly than reading from tradition
swap devices resulting in faster performance for many workloads.
This patch adds the zswap driver to mm/
Signed-off-by: Seth Jennings sjenn...@linux.vnet.ibm.com
---
mm/Kconfig| 15 ++
mm/Makefile | 1 +
mm/zsmalloc.c | 2
This patch adds the documentation file for the zswap functionality
Signed-off-by: Seth Jennings sjenn...@linux.vnet.ibm.com
---
Documentation/vm/zswap.txt | 82 ++
mm/zswap.c | 17 +-
2 files changed, 90 insertions(+), 9
On 02/23/2013 06:37 PM, Ric Mason wrote:
On 02/23/2013 05:02 AM, Seth Jennings wrote:
On 02/21/2013 08:56 PM, Ric Mason wrote:
On 02/21/2013 11:50 PM, Seth Jennings wrote:
On 02/21/2013 02:49 AM, Ric Mason wrote:
On 02/19/2013 03:16 AM, Seth Jennings wrote:
On 02/16/2013 12:21 AM, Ric Mason
On 02/24/2013 10:35 PM, Joonsoo Kim wrote:
Hello, Seth.
Here comes minor comments.
snip
+static int __zswap_cpu_notifier(unsigned long action, unsigned long cpu)
+{
+struct crypto_comp *tfm;
+u8 *dst;
+
+switch (action) {
+case CPU_UP_PREPARE:
+tfm =
On 02/24/2013 08:54 PM, Minchan Kim wrote:
Hi Seth,
On Wed, Feb 13, 2013 at 12:38:50PM -0600, Seth Jennings wrote:
This patch adds support for evicting swap pages that are currently
compressed in zswap to the swap device. This functionality is very
important and make zswap a true cache
On 02/25/2013 11:05 AM, Dan Magenheimer wrote:
From: Seth Jennings [mailto:sjenn...@linux.vnet.ibm.com]
Sent: Friday, February 22, 2013 1:04 PM
To: Joonsoo Kim
Subject: Re: [PATCHv5 1/8] zsmalloc: add to mm/
On 02/22/2013 03:24 AM, Joonsoo Kim wrote:
It's my quick thought. So
On 02/22/2013 03:40 AM, Joonsoo Kim wrote:
On Wed, Feb 20, 2013 at 04:04:41PM -0600, Seth Jennings wrote:
=
DO NOT MERGE, FOR REVIEW ONLY
This patch introduces zsmalloc as new code, however, it already
exists in drivers/staging. In order to build successfully, you
must select EITHER
On 02/22/2013 03:24 AM, Joonsoo Kim wrote:
On Wed, Feb 20, 2013 at 08:37:33AM +0900, Minchan Kim wrote:
On Tue, Feb 19, 2013 at 11:54:21AM -0600, Seth Jennings wrote:
On 02/19/2013 03:18 AM, Joonsoo Kim wrote:
Hello, Seth.
I'm not sure that this is right time to review, because I already have
On 02/21/2013 08:56 PM, Ric Mason wrote:
On 02/21/2013 11:50 PM, Seth Jennings wrote:
On 02/21/2013 02:49 AM, Ric Mason wrote:
On 02/19/2013 03:16 AM, Seth Jennings wrote:
On 02/16/2013 12:21 AM, Ric Mason wrote:
On 02/14/2013 02:38 AM, Seth Jennings wrote:
This patch adds a documentation
On 02/21/2013 02:49 AM, Ric Mason wrote:
On 02/19/2013 03:16 AM, Seth Jennings wrote:
On 02/16/2013 12:21 AM, Ric Mason wrote:
On 02/14/2013 02:38 AM, Seth Jennings wrote:
This patch adds a documentation file for zsmalloc at
Documentation/vm/zsmalloc.txt
Signed-off-by: Seth Jennings sjenn
On 02/21/2013 09:50 AM, Dan Magenheimer wrote:
From: Seth Jennings [mailto:sjenn...@linux.vnet.ibm.com]
Subject: [PATCHv6 0/8] zswap: compressed swap caching
Changelog:
v6:
* fix improper freeing of rbtree (Cody)
Cody's bug fix reminded me of a rather fundamental question:
Why does
On 02/21/2013 02:36 PM, Cody P Schafer wrote:
On Wed, Feb 20, 2013 at 04:04:41PM -0600, Seth Jennings wrote:
diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
+#define MAX(a, b) ((a) = (b) ? (a) : (b))
+/* ZS_MIN_ALLOC_SIZE must be multiple of ZS_ALIGN */
+#define ZS_MIN_ALLOC_SIZE \
+MAX(32
On 02/18/2013 01:55 PM, Dan Magenheimer wrote:
From: Seth Jennings [mailto:sjenn...@linux.vnet.ibm.com]
Subject: Re: [PATCHv5 4/8] zswap: add to mm/
On 02/15/2013 10:04 PM, Ric Mason wrote:
On 02/14/2013 02:38 AM, Seth Jennings wrote:
snip
+ * The statistics below are not protected from
179 191 7%
20 94 143 52%
24 60 128 113%
Seth Jennings (8):
zsmalloc: add to mm/
zsmalloc: add documentation
debugfs: add get/set for atomic types
zswap: add to mm/
mm: break up swap_writepage() for frontswap backends
mm: allow for outstanding swap
this
compressed store much more quickly than reading from tradition
swap devices resulting in faster performance for many workloads.
This patch adds the zswap driver to mm/
Signed-off-by: Seth Jennings sjenn...@linux.vnet.ibm.com
---
mm/Kconfig | 15 ++
mm/Makefile | 1 +
mm/zswap.c | 665
noncontigious pages.
zsmalloc fulfills the allocation needs for zram and zswap.
Acked-by: Nitin Gupta ngu...@vflare.org
Acked-by: Minchan Kim minc...@kernel.org
Signed-off-by: Seth Jennings sjenn...@linux.vnet.ibm.com
---
include/linux/zsmalloc.h | 56 +++
mm/Kconfig | 24 +
mm
This patch adds the documentation file for the zswap functionality
Signed-off-by: Seth Jennings sjenn...@linux.vnet.ibm.com
---
Documentation/vm/zswap.txt | 82 ++
1 file changed, 82 insertions(+)
create mode 100644 Documentation/vm/zswap.txt
diff
debugfs currently lack the ability to create attributes
that set/get atomic_t values.
This patch adds support for this through a new
debugfs_create_atomic_t() function.
Acked-by: Greg Kroah-Hartman gre...@linuxfoundation.org
Signed-off-by: Seth Jennings sjenn...@linux.vnet.ibm.com
---
fs
This patch adds a documentation file for zsmalloc at
Documentation/vm/zsmalloc.txt
Signed-off-by: Seth Jennings sjenn...@linux.vnet.ibm.com
---
Documentation/vm/zsmalloc.txt | 68 +++
1 file changed, 68 insertions(+)
create mode 100644 Documentation/vm
code path is operating on it.
Signed-off-by: Seth Jennings sjenn...@linux.vnet.ibm.com
---
mm/zswap.c | 531 ++---
1 file changed, 511 insertions(+), 20 deletions(-)
diff --git a/mm/zswap.c b/mm/zswap.c
index d3b4943..364bc18 100644
--- a/mm
is to be resumed can be added to the swap cache.
Acked-by: Minchan Kim minc...@kernel.org
Signed-off-by: Seth Jennings sjenn...@linux.vnet.ibm.com
---
include/linux/swap.h | 2 ++
mm/page_io.c | 16 +---
mm/swap_state.c | 2 +-
3 files changed, 16 insertions(+), 4 deletions
the accounting is done.
Acked-by: Minchan Kim minc...@kernel.org
Signed-off-by: Seth Jennings sjenn...@linux.vnet.ibm.com
---
include/linux/swap.h | 4 +++-
mm/page_io.c | 12 +++-
2 files changed, 10 insertions(+), 6 deletions(-)
diff --git a/include/linux/swap.h b/include/linux
!
But, I read the code, now, and then some comments below.
On Wed, Feb 13, 2013 at 12:38:44PM -0600, Seth Jennings wrote:
=
DO NOT MERGE, FOR REVIEW ONLY
This patch introduces zsmalloc as new code, however, it already
exists in drivers/staging. In order to build successfully, you
On 02/15/2013 09:26 PM, Ric Mason wrote:
On 02/14/2013 02:38 AM, Seth Jennings wrote:
=
DO NOT MERGE, FOR REVIEW ONLY
This patch introduces zsmalloc as new code, however, it already
exists in drivers/staging. In order to build successfully, you
must select EITHER to driver/staging
On 02/16/2013 12:21 AM, Ric Mason wrote:
On 02/14/2013 02:38 AM, Seth Jennings wrote:
This patch adds a documentation file for zsmalloc at
Documentation/vm/zsmalloc.txt
Signed-off-by: Seth Jennings sjenn...@linux.vnet.ibm.com
---
Documentation/vm/zsmalloc.txt | 68
On 02/15/2013 10:04 PM, Ric Mason wrote:
On 02/14/2013 02:38 AM, Seth Jennings wrote:
snip
+ * The statistics below are not protected from concurrent access for
+ * performance reasons so they may not be a 100% accurate. However,
+ * the do provide useful information on roughly how many times
On 02/16/2013 12:11 AM, Ric Mason wrote:
On 02/14/2013 02:38 AM, Seth Jennings wrote:
snip
+/***
+* page pool for temporary compression result
+/
+#define ZSWAP_TMPPAGE_POOL_PAGES 16
Why not the number
On 02/15/2013 09:20 PM, Ric Mason wrote:
On 02/14/2013 02:38 AM, Seth Jennings wrote:
snip
Some addition performance metrics regarding the performance
improvements and I/O reductions that can be achieved using zswap as
measured by SPECjbb are provided here:
http://ibm.co/VCgHvM
I see
On 02/18/2013 01:49 PM, Cody P Schafer wrote:
On 02/18/2013 11:24 AM, Seth Jennings wrote:
On 02/15/2013 10:04 PM, Ric Mason wrote:
On 02/14/2013 02:38 AM, Seth Jennings wrote:
snip
+/* invalidates all pages for the given swap type */
+static void zswap_frontswap_invalidate_area(unsigned
On 02/18/2013 01:55 PM, Dan Magenheimer wrote:
From: Seth Jennings [mailto:sjenn...@linux.vnet.ibm.com]
Subject: Re: [PATCHv5 4/8] zswap: add to mm/
On 02/15/2013 10:04 PM, Ric Mason wrote:
On 02/14/2013 02:38 AM, Seth Jennings wrote:
snip
+ * The statistics below are not protected from
On 01/29/2013 04:51 PM, Andrew Morton wrote:
On Tue, 29 Jan 2013 15:40:22 -0600
Seth Jennings sjenn...@linux.vnet.ibm.com wrote:
This patch promotes the slab-based zsmalloc memory allocator
from the staging tree to lib/
Hate to rain on the parade, but... we haven't reviewed zsmalloc
yet
On 02/01/2013 01:27 AM, Minchan Kim wrote:
On Tue, Jan 29, 2013 at 03:40:26PM -0600, Seth Jennings wrote:
This patchset adds support for flush pages out of the compressed
pool to the swap device
Thanks for the review Minchan! Sorry for the delayed response. I'm
prepping v5 for posting.
I
On 01/29/2013 04:21 AM, Lord Glauber Costa of Sealand wrote:
On 01/28/2013 07:27 PM, Seth Jennings wrote:
Yes, I prototyped a shrinker interface for zswap, but, as we both
figured, it shrinks the zswap compressed pool too aggressively to the
point of being useless.
Can't you advertise
On 02/02/2013 06:17 PM, Simon Jeons wrote:
On Fri, 2013-02-01 at 09:13 -0600, Seth Jennings wrote:
On 01/31/2013 07:39 PM, Simon Jeons wrote:
Hi Seth,
On Tue, 2013-01-29 at 15:40 -0600, Seth Jennings wrote:
snip
Performance, Kernel Building:
Setup
Gentoo w/ kernel v3.7-rc7
Quad
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