From: Zaslonko Mikhail <zaslonko@linux.ibm.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Chris Mason <clm@fb.com>, Josef Bacik <josef@toxicpanda.com>,
David Sterba <dsterba@suse.com>,
Richard Purdie <rpurdie@rpsys.net>,
Heiko Carstens <heiko.carstens@de.ibm.com>,
Vasily Gorbik <gor@linux.ibm.com>,
Christian Borntraeger <borntraeger@de.ibm.com>,
Eduard Shishkin <edward6@linux.ibm.com>,
Ilya Leoshkevich <iii@linux.ibm.com>,
linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Fwd: Re: [PATCH v4] btrfs: Use larger zlib buffer for s390 hardware compression
Date: Wed, 15 Jan 2020 10:54:53 +0100 [thread overview]
Message-ID: <e66fa494-e137-ed73-6db3-15fcbd232eb7@linux.ibm.com> (raw)
In-Reply-To: <20200114161857.GD3929@suse.cz>
Hello Andrew,
Could you please pick this V4 btrfs patch and the other five patches from V3 patch
set (https://lkml.org/lkml/2020/1/3/568).
Older patches can be dropped from linux-next:
* ac2aeaa0f4d3 btrfs: use larger zlib buffer for s390 hardware compression
* ac19f15aea33 lib/zlib: add zlib_deflate_dfltcc_enabled() function
* 3447c9a51196 s390/boot: add dfltcc= kernel command line parameter
* 890060df4401 lib/zlib: add s390 hardware support for kernel zlib_inflate
* 148f7d060405 s390/boot: rename HEAP_SIZE due to name collision
* bfbef17740fd lib/zlib: add s390 hardware support for kernel zlib_deflate
Thanks,
Mikhail.
-------- Forwarded Message --------
Subject: Re: [PATCH v4] btrfs: Use larger zlib buffer for s390 hardware compression
Date: Tue, 14 Jan 2020 17:18:57 +0100
From: David Sterba <dsterba@suse.cz>
Reply-To: dsterba@suse.cz
To: Mikhail Zaslonko <zaslonko@linux.ibm.com>
CC: Andrew Morton <akpm@linux-foundation.org>, Chris Mason <clm@fb.com>, Josef Bacik <josef@toxicpanda.com>, David Sterba <dsterba@suse.com>, Richard Purdie <rpurdie@rpsys.net>, Heiko Carstens <heiko.carstens@de.ibm.com>, Vasily Gorbik <gor@linux.ibm.com>, Christian Borntraeger <borntraeger@de.ibm.com>, Eduard Shishkin <edward6@linux.ibm.com>, Ilya Leoshkevich <iii@linux.ibm.com>, linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org
On Wed, Jan 08, 2020 at 11:51:03AM +0100, Mikhail Zaslonko wrote:
> In order to benefit from s390 zlib hardware compression support,
> increase the btrfs zlib workspace buffer size from 1 to 4 pages (if
> s390 zlib hardware support is enabled on the machine). This brings up
> to 60% better performance in hardware on s390 compared to the PAGE_SIZE
> buffer and much more compared to the software zlib processing in btrfs.
> In case of memory pressure, fall back to a single page buffer during
> workspace allocation.
> The data compressed with larger input buffers will still conform to zlib
> standard and thus can be decompressed also on a systems that uses only
> PAGE_SIZE buffer for btrfs zlib.
>
> Signed-off-by: Mikhail Zaslonko <zaslonko@linux.ibm.com>
Reviewed-by: David Sterba <dsterba@suse.com>
prev parent reply other threads:[~2020-01-15 9:55 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-03 22:33 [PATCH v3 0/6] S390 hardware support for kernel zlib Mikhail Zaslonko
2020-01-03 22:33 ` [PATCH v3 1/6] lib/zlib: Add s390 hardware support for kernel zlib_deflate Mikhail Zaslonko
2020-01-03 22:33 ` [PATCH v3 2/6] s390/boot: Rename HEAP_SIZE due to name collision Mikhail Zaslonko
2020-01-07 14:50 ` Christian Borntraeger
2020-01-03 22:33 ` [PATCH v3 3/6] lib/zlib: Add s390 hardware support for kernel zlib_inflate Mikhail Zaslonko
2020-01-03 22:33 ` [PATCH v3 4/6] s390/boot: Add dfltcc= kernel command line parameter Mikhail Zaslonko
2020-01-03 22:33 ` [PATCH v3 5/6] lib/zlib: Add zlib_deflate_dfltcc_enabled() function Mikhail Zaslonko
2020-01-03 22:33 ` [PATCH v3 6/6] btrfs: Use larger zlib buffer for s390 hardware compression Mikhail Zaslonko
2020-01-06 16:40 ` Josef Bacik
2020-01-07 10:30 ` Zaslonko Mikhail
2020-01-06 18:43 ` David Sterba
2020-01-07 0:18 ` Eduard Shishkin
2020-01-07 14:30 ` David Sterba
2020-01-08 10:51 ` [PATCH v4] " Mikhail Zaslonko
2020-01-08 15:08 ` Josef Bacik
2020-01-08 18:48 ` Zaslonko Mikhail
2020-01-09 1:10 ` David Sterba
2020-01-09 1:10 ` David Sterba
2020-01-13 10:03 ` Zaslonko Mikhail
2020-01-14 16:19 ` David Sterba
2020-01-14 16:19 ` David Sterba
2020-01-14 16:18 ` David Sterba
2020-01-15 9:54 ` Zaslonko Mikhail [this message]
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