t;
>> On Wed, Dec 12, 2018 at 1:37 PM Markus F.X.J. Oberhumer
>> wrote:
>>>
>>> I still claim that (0xf000, 4096) is not a valid C "pointer
>>> to an object" according to the C standard - please see my reply below.
>>>
>&
s.
Cheers,
Markus
On 2018-12-12 06:21, Yueyi Li wrote:
> Hi Markus,
>
> OK, thanks. I`ll change it in v3.
>
> Thanks,
> Yueyi
>
> On 2018/12/6 23:03, Markus F.X.J. Oberhumer wrote:
>> Hi Yueyi,
>>
>> yes, my LZO patch works for all cases.
>>
&g
63-7-dave.rodg...@arm.com
> Signed-off-by: Dave Rodgman
> Cc: David S. Miller
> Cc: Greg Kroah-Hartman
> Cc: Herbert Xu
> Cc: Markus F.X.J. Oberhumer
> Cc: Matt Sealey
> Cc: Minchan Kim
> Cc: Nitin Gupta
> Cc: Richard Purdie
> Cc: Sergey Senozhatsky
>
iteback or simply positively incrementing offsets which
> seems to positively affect performance. It is, at least, fewer
> instructions to do the same job.
>
> Link: http://lkml.kernel.org/r/20181127161913.23863-3-dave.rodg...@arm.com
> Signed-off-by: Matt Sealey
> Signed-off-by:
Acked-by: Markus F.X.J. Oberhumer
On 2018-11-30 15:26, Dave Rodgman wrote:
> From: Matt Sealey
>
> Enable faster 8-byte copies on arm64.
>
> Link: http://lkml.kernel.org/r/20181127161913.23863-6-dave.rodg...@arm.com
> Signed-off-by: Matt Sealey
> Signed-off-by: Dave R
Acked-by: Markus F.X.J. Oberhumer
On 2018-11-30 15:26, Dave Rodgman wrote:
> From: Matt Sealey
>
> LZO leaves some performance on the table by not realising that arm64 can
> optimize count-trailing-zeros bit operations.
>
> Add CONFIG_ARM64 to the checked definitions along
thing as the LZO_USE_CTZ32 code, only with more
> register pressure.
>
> Link: http://lkml.kernel.org/r/20181127161913.23863-4-dave.rodg...@arm.com
> Signed-off-by: Matt Sealey
> Signed-off-by: Dave Rodgman
> Cc: David S. Miller
> Cc: Greg Kroah-Hartman
> Cc: Herbert Xu
Acked-by: Markus F.X.J. Oberhumer
On 2018-11-30 15:26, Dave Rodgman wrote:
> Modify the ifdefs in lzodefs.h to be more consistent with normal kernel
> macros (e.g., change __aarch64__ to CONFIG_ARM64).
>
> Signed-off-by: Dave Rodgman
> Cc: Herbert Xu
> Cc: David S. Miller
On 2018-11-30 15:26, Dave Rodgman wrote:
> This patch series introduces performance improvements for lzo.
>
> The previous version of this patchset is here:
> https://lkml.org/lkml/2018/11/30/807
>
> This version of the patchset fixes a maybe-used-uninitialized warning
> (although the previous ve
= 0;
}
Valid code like this will fail horribly when (p, len) is the very
last virtual page (because end will be the NULL pointer in this case).
Cheers,
Markus
On 2018-12-05 04:07, Yueyi Li wrote:
> Hi Markus,
>
> Thanks for your review.
>
> On 2018/12/4 18:20, Markus F.X.J
Hi,
I don't think that address space wraparound is legal in C, but I
understand that we are in kernel land and if you really want to
compress the last virtual page 0xf000 the following
small patch should fix that dubious case.
This also avoids slowing down the the hot path of the comp
On 2018-11-21 18:31, Christoph Hellwig wrote:
>> #define LZO_USE_CTZ32 1
>> #elif defined(__i386__) || defined(__powerpc__)
>> #define LZO_USE_CTZ32 1
>> -#elif defined(__arm__) && (__LINUX_ARM_ARCH__ >= 5)
>> +#elif defined(__arm__)
>> +#if (__LINUX_ARM_ARCH__ >= 5)
>> #define LZO_
Hi Dave,
thanks for your patch set. Just some initial comments:
I think the three patches
[PATCH 2/6] lib/lzo: enable 64-bit CTZ on Arm
[PATCH 3/6] lib/lzo: 64-bit CTZ on Arm aarch64
[PATCH 4/6] lib/lzo: fast 8-byte copy on arm64
should be applied in any case - could you please make an e
mpress_unlz4.c
> create mode 100644 lib/lz4/Makefile
> create mode 100644 lib/lz4/lz4_decompress.c
> create mode 100644 lib/lz4/lz4defs.h
>
--
Markus Oberhumer, , http://www.oberhumer.com/
commit 8745b927fcfcd6953ada9bd1220a73083db5948a
Author: Markus F.X.J. Oberhumer
Date: Mon
On 2013-02-26 18:28, Linus Torvalds wrote:
> On Thu, Feb 21, 2013 at 9:26 PM, Markus F.X.J. Oberhumer
> wrote:
>>
>> please pull my "lzo-update" branch from
>>
>> git://github.com/markus-oberhumer/linux.git lzo-update
>
> I *really* want github (
essed buffer */
+ unsigned char unc[LZO_UNC_SIZE] cacheline_aligned; /*
uncompressed buffer */
+ unsigned char cmp[LZO_CMP_SIZE] cacheline_aligned; /*
compressed buffer */
};
/**
Signed-off-by: Markus F.X.J. Oberhumer
--
Markus Oberhumer, , http://www.oberhume
m version which features significant performance improvements
on modern machines.
$ git shortlog v3.8..lzo-update
Markus F.X.J. Oberhumer (3):
lib/lzo: Rename lzo1x_decompress.c to lzo1x_decompress_safe.c
lib/lzo: Update LZO compression to current upstream version
crypto: testm
On 2013-02-01 08:00, kyungsik.lee wrote:
> On 2013-01-30 오전 6:09, Rajesh Pawar wrote:
>>> Andrew Morton wrote:
>>>
>>> On Sat, 26 Jan 2013 14:50:43 +0900
>>> Kyungsik Lee wrote:
[...]
>>> What's this "with enabled unaligned memory access" thing? You mean "if
>>> the arch supports CONFIG
sec 117 MB/sec
LZO-2013-UA : 47 MB/sec 167 MB/sec
Legend:
LZO-2005: LZO version in current 3.8 rc6 kernel (which is based on
the LZO 2.02 release from 2005)
LZO-2012: updated LZO version available in linux-next
LZO-2013-UA : updated
On 2012-10-15 21:19, Seth Jennings wrote:
>> As requested by akpm I am sending my "lzo-update" branch at
>>
>> git://github.com/markus-oberhumer/linux.git lzo-update
>>
>> to lkml as a patch series created by "git format-patch -M v3.5..lzo-update".
>>
>> You can also browse the branch at
>>
>>
Thanks Fabio,
that should already be fixed on the "lzo-update" branch at
git://github.com/markus-oberhumer/linux.git lzo-update
Cheers,
Markus
On 2012-10-14 20:13, Fabio Estevam wrote:
> From: Fabio Estevam
>
> Commit 7c979cebc (lib/lzo: Rename lzo1x_decompress.c to
> lzo1x_decompress_safe
Thanks Arnd,
On 2012-10-11 13:41, Arnd Bergmann wrote:
> On Tuesday 09 October 2012, Markus F.X.J. Oberhumer wrote:
>>>
>>> : This commit updates the kernel LZO code to the current upsteam version
>>> : which features a significant speed improvement - benchmarking
Hi Stephen,
On 2012-10-09 21:26, Andrew Morton wrote:
> On Sun, 7 Oct 2012 17:07:55 +0200
> "Markus F.X.J. Oberhumer" wrote:
>
>> As requested by akpm I am sending my "lzo-update" branch at
>>
>> git://github.com/markus-oberhumer/linux.git lzo-up
Some code paths are only benefical on machines with fast unaligned
loads, so only use these if CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
defined.
Signed-off-by: Markus F.X.J. Oberhumer
---
lib/lzo/lzo1x_compress.c|4 ++--
lib/lzo/lzo1x_decompress_safe.c | 15 ---
lib/lzo
-by: Markus F.X.J. Oberhumer
---
include/linux/lzo.h | 15 +-
lib/lzo/lzo1x_compress.c| 309 +++
lib/lzo/lzo1x_decompress_safe.c | 341 ++-
lib/lzo/lzodefs.h | 34 +++-
4 files changed, 360
Rename the source file to match the function name and thereby
also make room for a possible future even slightly faster
"non-safe" decompressor version.
Signed-off-by: Markus F.X.J. Oberhumer
---
lib/lzo/Makefile |2 +-
...{lzo1x_de
erhumer/linux/commit/5f702781f158cb59075cfa97e5c21f52275057f1
Share and enjoy,
Markus
Markus F.X.J. Oberhumer (3):
lib/lzo: Rename lzo1x_decompress.c to lzo1x_decompress_safe.c
lib/lzo: Update LZO compression to current upstream version
lib/lzo: Optimize code for CPUs with inefficient unaligned access
include/linux/lzo.
Hi all,
is there some official maintainer who feels responsible for
pushing the LZO update to Linus?
Otherwise I also could issue a pull-request on github, but somehow I
don't think that this is the preferred workflow.
Cheers,
Markus
On 2012-08-21 17:21, Markus F.X.J. Oberhumer wrote:
>
#x27;d ask some official kernel maintainer for review and to push this into
linux-next so that it will hopefully land in the 3.7 release.
Share and enjoy,
Markus
Signed-off-by: Markus F.X.J. Oberhumer
[ Changes in v2: Optimize code for CPUs with inefficient unaligned
access => significant
On 2012-08-15 16:45, Johannes Stezenbach wrote:
> On Wed, Aug 15, 2012 at 02:02:43PM +0200, Markus F.X.J. Oberhumer wrote:
>> On 2012-08-14 14:39, Johannes Stezenbach wrote:
>>> On Tue, Aug 14, 2012 at 01:44:02AM +0200, Markus F.X.J. Oberhumer wrote:
>>>> On
Hi Johannes,
On 2012-08-14 14:39, Johannes Stezenbach wrote:
> On Tue, Aug 14, 2012 at 01:44:02AM +0200, Markus F.X.J. Oberhumer wrote:
>> On 2012-07-16 20:30, Markus F.X.J. Oberhumer wrote:
>>>
>>> As stated in the README this version is significantly faster (typi
On 2012-08-14 05:15, Andi Kleen wrote:
> On Tue, Aug 14, 2012 at 01:44:02AM +0200, Markus F.X.J. Oberhumer wrote:
>> Hi all,
>>
>> as suggested on the mailing list I have converted the updated LZO
>> code into git, so please pull my "lzo-update" branch
#x27;d ask some official kernel maintainer for review and to push this into
linux-next so that it will hopefully land in the 3.7 release.
Share and enjoy,
Markus
Signed-off-by: Markus F.X.J. Oberhumer
On 2012-07-16 20:30, Markus F.X.J. Oberhumer wrote:
> Hi all,
>
> I finally have prepa
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