Changes in Makefile

1d3100cf - zram: add 842 compression backend support

Mon, 02 Sep 2024 10:55:59 +0000

zram: add 842 compression backend supportAdd s/w 842 compression support.Link: https://lkml.kernel.org/r/20240902105656.1383858-12-senozhatsky@chromium.orgSigned-off-by: Sergey Senozhatsky Cc: Minchan Kim Cc: Nick Terrell Signed-off-by: Andrew Morton List of files: /linux-6.15/drivers/block/zram/Makefile

84112e31 - zram: add zlib compression backend support

Mon, 02 Sep 2024 10:55:58 +0000

zram: add zlib compression backend supportAdd s/w zlib (inflate/deflate) compression.Link: https://lkml.kernel.org/r/20240902105656.1383858-11-senozhatsky@chromium.orgSigned-off-by: Sergey Senozhatsky Cc: Minchan Kim Cc: Nick Terrell Signed-off-by: Andrew Morton List of files: /linux-6.15/drivers/block/zram/Makefile

73e7d81a - zram: add zstd compression backend support

Mon, 02 Sep 2024 10:55:56 +0000

zram: add zstd compression backend supportAdd s/w zstd compression.Link: https://lkml.kernel.org/r/20240902105656.1383858-9-senozhatsky@chromium.orgSigned-off-by: Sergey Senozhatsky Cc: Minchan Kim Cc: Nick Terrell Signed-off-by: Andrew Morton List of files: /linux-6.15/drivers/block/zram/Makefile

c60a4ef5 - zram: add lz4hc compression backend support

Mon, 02 Sep 2024 10:55:55 +0000

zram: add lz4hc compression backend supportAdd s/w lz4hc compression support.Link: https://lkml.kernel.org/r/20240902105656.1383858-8-senozhatsky@chromium.orgSigned-off-by: Sergey Senozhatsky Cc: Minchan Kim Cc: Nick Terrell Signed-off-by: Andrew Morton List of files: /linux-6.15/drivers/block/zram/Makefile

22d651c3 - zram: add lz4 compression backend support

Mon, 02 Sep 2024 10:55:54 +0000

zram: add lz4 compression backend supportAdd s/w lz4 compression support.Link: https://lkml.kernel.org/r/20240902105656.1383858-7-senozhatsky@chromium.orgSigned-off-by: Sergey Senozhatsky Cc: Minchan Kim Cc: Nick Terrell Signed-off-by: Andrew Morton List of files: /linux-6.15/drivers/block/zram/Makefile

2152247c - zram: add lzo and lzorle compression backends support

Mon, 02 Sep 2024 10:55:53 +0000

zram: add lzo and lzorle compression backends supportAdd s/w lzo/lzorle compression support.Link: https://lkml.kernel.org/r/20240902105656.1383858-6-senozhatsky@chromium.orgSigned-off-by: Sergey Senozhatsky Cc: Minchan Kim Cc: Nick Terrell Signed-off-by: Andrew Morton List of files: /linux-6.15/drivers/block/zram/Makefile

ec8f24b7 - treewide: Add SPDX license identifier - Makefile/Kconfig

Sun, 19 May 2019 12:07:45 +0000

treewide: Add SPDX license identifier - Makefile/KconfigAdd SPDX license identifiers to all Make/Kconfig files which: - Have no license information of any formThese files fall under the project license, GPL v2 only. The resulting SPDXlicense identifier is: GPL-2.0-onlySigned-off-by: Thomas Gleixner Signed-off-by: Greg Kroah-Hartman List of files: /linux-6.15/drivers/block/zram/Makefile

ce1ed9f9 - zram: delete custom lzo/lz4

Tue, 26 Jul 2016 22:22:54 +0000

zram: delete custom lzo/lz4Remove lzo/lz4 backends, we use crypto API now.[sergey.senozhatsky@gmail.com: zram-delete-custom-lzo-lz4-v3] Link: http://lkml.kernel.org/r/20160604024902.11778-6-sergey.senozhatsky@gmail.comLink: http://lkml.kernel.org/r/20160531122017.2878-7-sergey.senozhatsky@gmail.comSigned-off-by: Sergey Senozhatsky Acked-by: Minchan Kim Cc: Joonsoo Kim Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux-6.15/drivers/block/zram/Makefile

6e76668e - zram: add lz4 algorithm backend

Mon, 07 Apr 2014 22:38:18 +0000

zram: add lz4 algorithm backendIntroduce LZ4 compression backend and make it available for selection.LZ4 support is optional and requires user to set ZRAM_LZ4_COMPRESS configoption. The default compression backend is LZO.TEST(x86_64, core i5, 2 cores + 2 hyperthreading, zram disk size 1G,ext4 file system, 3 compression streams)iozone -t 3 -R -r 16K -s 60M -I +Z Test LZO LZ4---------------------------------------------- Initial write 1642744.62 1317005.09 Rewrite 2498980.88 1800645.16 Read 3957026.38 5877043.75 Re-read 3950997.38 5861847.00 Reverse Read 2937114.56 5047384.00 Stride read 2948163.19 4929587.38 Random read 3292692.69 4880793.62 Mixed workload 1545602.62 3502940.38 Random write 2448039.75 1758786.25 Pwrite 1670051.03 1338329.69 Pread 2530682.00 5097177.62 Fwrite 3232085.62 3275942.56 Fread 6306880.25 6645271.12So on my system LZ4 is slower in write-only tests, while it performsbetter in read-only and mixed (reads + writes) tests.Official LZ4 benchmarks available here http://code.google.com/p/lz4/(linux kernel uses revision r90).Signed-off-by: Sergey Senozhatsky Acked-by: Minchan Kim Cc: Jerome Marchand Cc: Nitin Gupta Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux-6.15/drivers/block/zram/Makefile

b7ca232e - zram: use zcomp compressing backends

Mon, 07 Apr 2014 22:38:12 +0000

zram: use zcomp compressing backendsDo not perform direct LZO compress/decompress calls, initialiseand use zcomp LZO backend (single compression stream) instead.[akpm@linux-foundation.org: resolve conflicts with zram-delete-zram_init_device-fix.patch]Signed-off-by: Sergey Senozhatsky Acked-by: Minchan Kim Cc: Jerome Marchand Cc: Nitin Gupta Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux-6.15/drivers/block/zram/Makefile

cd67e10a - zram: promote zram from staging

Thu, 30 Jan 2014 23:45:52 +0000

zram: promote zram from stagingZram has lived in staging for a LONG LONG time and have beenfixed/improved by many contributors so code is clean and stable now. Ofcourse, there are lots of product using zram in real practice.The major TV companys have used zram as swap since two years ago andrecently our production team released android smart phone with zramwhich is used as swap, too and recently Android Kitkat start to use zramfor small memory smart phone. And there was a report Google releasedtheir ChromeOS with zram, too and cyanogenmod have been used zram longtime ago. And I heard some disto have used zram block device for tmpfs.In addition, I saw many report from many other peoples. For example,Lubuntu start to use it.The benefit of zram is very clear. With my experience, one of thebenefit was to remove jitter of video application with backgroud memorypressure. It would be effect of efficient memory usage by compressionbut more issue is whether swap is there or not in the system. Recentmobile platforms have used JAVA so there are many anonymous pages. Butembedded system normally are reluctant to use eMMC or SDCard as swapbecause there is wear-leveling and latency issues so if we do not useswap, it means we can't reclaim anoymous pages and at last, we couldencounter OOM kill. :(Although we have real storage as swap, it was a problem, too. Becauseit sometime ends up making system very unresponsible caused by slow swapstorage performance.Quote from Luigi on Google "Since Chrome OS was mentioned: the main reason why we don't use swap to a disk (rotating or SSD) is because it doesn't degrade gracefully and leads to a bad interactive experience. Generally we prefer to manage RAM at a higher level, by transparently killing and restarting processes. But we noticed that zram is fast enough to be competitive with the latter, and it lets us make more efficient use of the available RAM. " and he announced.http://www.spinics.net/lists/linux-mm/msg57717.htmlOther uses case is to use zram for block device. Zram is block deviceso anyone can format the block device and mount on it so some guys onthe internet start zram as /var/tmp.http://forums.gentoo.org/viewtopic-t-838198-start-0.htmlLet's promote zram and enhance/maintain it instead of removing.Signed-off-by: Minchan Kim Reviewed-by: Konrad Rzeszutek Wilk Acked-by: Nitin Gupta Acked-by: Pekka Enberg Cc: Bob Liu Cc: Greg Kroah-Hartman Cc: Hugh Dickins Cc: Jens Axboe Cc: Luigi Semenzato Cc: Mel Gorman Cc: Rik van Riel Cc: Seth Jennings Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux-6.15/drivers/block/zram/Makefile