Z3fold vs zsmalloc

    Buildresult: powerpc-next/powerpc-allmodconfig/powerpc-gcc5 built on Nov 16 2017, 08:13 kisskb

      • The superior z3fold allocator allows up to 3 compressed objects by page. The compression ratio with z3fold typically averages 2.7 while it is 1.7 for zbud. A zpool of type z3fold is created by default. Use the kernel parameter zswap.zpool to select another method at boot time.
      • Z3 is a theorem prover from Microsoft Research with support for bitvectors, booleans, arrays, floating point numbers, strings, and other data types.
      • # # automatically generated file; do not edit. # linux/x86 5.5.9-1 kernel configuration # # # compiler: gcc (debian 4.9.2-10+deb8u2) 4.9.2 # config_cc_is_gcc=y config_gcc_version=40902 config_clang_version=0 config_cc_can_link=y config_cc_has_asm_goto=y config_cc_has_warn_maybe_uninitialized=y config_irq_work=y config_buildtime_extable_sort=y config_thread_info_in_task=y # # general setup ...
      • 3.3 Z3fold. z3fold是一个较新的内存分配器, 与zbud不同的是, 将3个objects存到1个单独的page中,也就是zbud内存利用率极限是1:2, z3fold极限是1:3。同样z3fold是可以支持LRU的, 但分配的内存是不可移动的。 4. 内存压缩技术与内存分配器组合对比分析
      • -- Ben Hutchings Sat, 24 Aug 2019 19:07:56 +0100 linux (5.2.17-1kali2) kali-dev; urgency=medium * Re-upload for Perl migration -- Sophie Brun Thu, 17 Oct 2019 10:01:50 +0200 linux (5.2.17-1kali1) kali-experimental; urgency=medium * Sync with Debian -- Sophie Brun Fri, 27 Sep 2019 10:37:14 +0200 linux (5.2.17-1) unstable; urgency=medium * New ...
      • The superior z3fold allocator allows up to 3 compressed objects by page. The compression ratio with z3fold typically averages 2.7 while it is 1.7 for zbud. A zpool of type z3fold is created by default. Use the kernel parameter zswap.zpool to select another method at boot time.
    • [ 0s] Using BUILD_ROOT=/var/cache/obs/worker/root_1/.mount [ 0s] Using BUILD_ARCH=x86_64:i686:i586:i486:i386 [ 0s] Doing kvm build in /var/cache/obs/worker/root_1 ...
      • 381 382 383 munlock()/munlockall() SYSTEM CALL HANDLING 384----- 385 386 The munlock() and munlockall() system calls are handled by the same functions - 387 do_mlock[all]() - as the mlock() and mlockall() system calls with the unlock vs 388 lock operation indicated by an argument.
    • Buildresult: powerpc-next/powerpc-allmodconfig/powerpc-gcc5 built on Nov 16 2017, 08:13 kisskb
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      • Code: Select all. sudo update-initramfs -u -k all. Now you can remove zswap.zpool=zsmalloc parameter using Grub Customizer.
      • Config for Andi. GitHub Gist: instantly share code, notes, and snippets.
      • Objective functions in Z3. Be sure to follow along with the examples by clicking the "edit" link in the corner. See what the tool says, try your own formulas, and experiment!
      • Z3 is a theorem prover from Microsoft Research with support for bitvectors, booleans, arrays, floating point numbers, strings, and other data types.
    • 381 382 383 munlock()/munlockall() SYSTEM CALL HANDLING 384----- 385 386 The munlock() and munlockall() system calls are handled by the same functions - 387 do_mlock[all]() - as the mlock() and mlockall() system calls with the unlock vs 388 lock operation indicated by an argument.
    • Code: Select all. sudo update-initramfs -u -k all. Now you can remove zswap.zpool=zsmalloc parameter using Grub Customizer.
      • Sep 15, 2020 · Date: Tue, 15 Sep 2020 22:18:16 +0800: From: Rong Chen <> Subject: Re: [tip:x86/seves] BUILD SUCCESS WITH WARNING e6eb15c9ba3165698488ae5c34920eea20eaa38e
    • The newest Raspberry Pi 64-bit OS, OPENFANS open source community & Raspberry Pi Fan base community Co-Produced.. This is an official version readme for the newest version 2.0 of 64-bit OS which is support for the full range of 64-bit CPU Raspberry Pi such as 3B, 3B+, 3A+, 4B.
    • Config for Andi. GitHub Gist: instantly share code, notes, and snippets.
    • However, the zsmalloc is not an optimal selection in some environment. The author gives embedded environment which fast response is important as an example. In such environment, though compress ratio is a little bit less, faster response (e..g, z3fold) is more valuable. •Tracing vs. CR2 (multiple crashes) Enable FSGSBASE instructions; at least one otherwise undisclosed crash in a third party kernel; several crashes during internal testing; Ksplice — also, we're hiring! Ksplice is Oracle's technology for patching security vulnerabilities in the Linux kernel without rebooting. Ksplice supports patching entry ... •- mm/z3fold.c: fix race between migration and destruction (bnc#1012628). - mm, page_alloc: move_freepages should not examine struct page of reserved memory (bnc#1012628). - mm: memcontrol: flush percpu vmstats before releasing memcg (bnc#1012628). - mm: memcontrol: flush percpu vmevents before releasing memcg (bnc#1012628).

      EDIT 2: echo "zsmalloc" > /sys/module/zswap/parameters/zpool switches zswap's allocator from zbud to zsmalloc. Continuing with my test fixture for the above experiments and comparing I did try z3fold and it slowed the computer tremendously while keeping the CPU load high, as compared to zsmalloc.

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    • 3.3 Z3fold. z3fold是一个较新的内存分配器, 与zbud不同的是, 将3个objects存到1个单独的page中,也就是zbud内存利用率极限是1:2, z3fold极限是1:3。同样z3fold是可以支持LRU的, 但分配的内存是不可移动的。 4. 内存压缩技术与内存分配器组合对比分析 •Z3 is a theorem prover from Microsoft Research with support for bitvectors, booleans, arrays, floating point numbers, strings, and other data types.

      Some chunks * in the beginning of an allocated page are occupied by z3fold header, so * NCHUNKS will be calculated to 63 (or 62 in case CONFIG_DEBUG_SPINLOCK=y), * which shows the max number of free chunks in z3fold page, also there will * be 63, or 62, respectively, freelists per pool. */ #define NCHUNKS_ORDER 6 #define CHUNK_SHIFT (PAGE_SHIFT ...

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    • (3) 3 product ratings - Unlocked Lenovo Motorola Moto Z3 Play XT1929-4 PA9S0017US 6" 32GB 4G Deep Indigo •[PATCH] zlib: move EXPORT_SYMBOL() and MODULE_LICENSE() out of dfltcc_syms.c 2020-12-27 6:24 UTC - mbox.gz / Atom [PATCH 1/2] mm: Allow architectures to request 'old' entries when prefaulting 2020-12-27 2:38 UTC (21+ messages) - mbox.gz / Atom linux-next: Tree for Dec 23 (ia64: mmzone & sparsemem) 2020-12-27 2:25 UTC - mbox.gz / Atom [linux ...

      z3fold: zstd: 30h 18m (1818m52.867s) +1 hour 10 minutes 7 GiB: none: 10% (700 MiB) zsmalloc: zstd: 28h 43m (1723m9.704s)-26 minutes 7 GiB: none: 20% (1400 MiB) z3fold: zstd: 30h 18m (1818m55.137s) +1 hour 10 minutes

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    [PATCH] zlib: move EXPORT_SYMBOL() and MODULE_LICENSE() out of dfltcc_syms.c 2020-12-27 6:24 UTC - mbox.gz / Atom [PATCH 1/2] mm: Allow architectures to request 'old' entries when prefaulting 2020-12-27 2:38 UTC (21+ messages) - mbox.gz / Atom linux-next: Tree for Dec 23 (ia64: mmzone & sparsemem) 2020-12-27 2:25 UTC - mbox.gz / Atom [linux ...

    # # Automatically generated file; DO NOT EDIT. # Linux/arm 5.4.54 Kernel Configuration # # # Compiler: arm-slackware-linux-gnueabihf-gcc (GCC) 9.3.0 # CONFIG_CC_IS_GCC=y CONFIG_GC

    Mock Version: 1.2.17 ENTER ['do'](['bash', '--login', '-c', '/usr/bin/rpmbuild -bs --target x86_64 --nodeps /builddir/build/SPECS/kernel.spec'], chrootPath='/var/lib ...

    config_z3fold=y config_zsmalloc=y # config_pgtable_mapping is not set # config_zsmalloc_stat is not set config_generic_early_ioremap=y

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    Dec 18, 2019 · Currently, ZRAM is used only with zsmalloc. However, the zsmalloc is not an optimal selection in some environment. The author gives embedded environment which fast response is important as an example. In such environment, though compress ratio is a little bit less, faster response (e..g, z3fold) is more valuable.

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    However, the zsmalloc is not an optimal selection in some environment. The author gives embedded environment which fast response is important as an example. In such environment, though compress ratio is a little bit less, faster response (e..g, z3fold) is more valuable.

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    Oct 17, 2020 · Still working at trying to get Linux operating on a custom AM3352 processor. I am using a prebuilt Kernel 4.19.94-ti-r36 for the BBB. I am using my own DTB file. I am scratching my head with regard to what is happening to the Getty for TTYS0. Thoughts anyone? loading /boot/initrd.img-4.19.94-ti-r36 ... 6447239 bytes read in 858 ms (7.2 MiB/s) debug: [console=ttyS0,115200n8 earlyprintk coherent ...

    mm/z3fold.c: fix race between migration and destruction mm/zsmalloc.c: migration can leave pages in ZS_EMPTY indefinitely mm/zsmalloc.c: fix race condition in zs_destroy_pool Huy Nguyen (2): net/mlx5: Support inner header match criteria for non decap flow action net/mlx5e: Only support tx/rx pause setting for port owner Hyungwoo Yang (1):

    The superior z3fold allocator allows up to 3 compressed objects by page. The compression ratio with z3fold typically averages 2.7 while it is 1.7 for zbud. A zpool of type z3fold is created by default. Use the kernel parameter zswap.zpool to select another method at boot time.

    Mock Version: 1.3.4 Mock Version: 1.3.4 ENTER ['do'](['/usr/bin/rpmbuild', '-bs', '--target', 'x86_64', '--nodeps', u'/builddir/build/SPECS/kernel.spec'], nspawn_args ...

    # # automatically generated file; do not edit. # linux/arm 4.9.60 kernel configuration # config_arm=y config_arm_has_sg_chain=y config_need_sg_dma_length=y config_arm_dma_use_iommu=y config_arm_dma_iommu_alignment=8 config_might_have_pci=y config_sys_supports_apm_emulation=y config_have_proc_cpu=y config_stacktrace_support=y config_lockdep_support=y config_trace_irqflags_support=y config_rwsem ...

    - mm/z3fold.c: fix race between migration and destruction (bnc#1012628). - mm, page_alloc: move_freepages should not examine struct page of reserved memory (bnc#1012628). - mm: memcontrol: flush percpu vmstats before releasing memcg (bnc#1012628). - mm: memcontrol: flush percpu vmevents before releasing memcg (bnc#1012628).

    # # automatically generated file; do not edit. # linux/x86 4.19.0-rc4 kernel configuration # # # compiler: gcc (gcc) 8.0.1 20180413 (experimental) # config_cc_is_gcc=y config_gcc_version=80001 config_clang_version=0 config_constructors=y config_irq_work=y config_buildtime_extable_sort=y config_thread_info_in_task=y # # general setup # config_init_env_arg_limit=32 # config_compile_test is not ...

    Oct 21, 2020 · From: Alex Shi <> Subject: Re: [PATCH v19 18/20] mm/lru: replace pgdat lru_lock with lruvec lock: Date: Wed, 21 Oct 2020 15:23:34 +0800

    How much better compression it provides is not detailed. zsmalloc is, in practice, the fastest allocator. z3fold is similar to zbud but it can compress 3:1, not just 2:1. It is a fairly recent addition to the Linux kernel so you may not have it available if you are using a LTS distribution. z3fold is, in practice, the slowest allocator. See also

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    Sep 15, 2020 · Date: Tue, 15 Sep 2020 22:18:16 +0800: From: Rong Chen <> Subject: Re: [tip:x86/seves] BUILD SUCCESS WITH WARNING e6eb15c9ba3165698488ae5c34920eea20eaa38e Z scores (Z value) is the number of standard deviations a score or a value (x) away from the mean. In other words, Z-score measures the dispersion of data. Technically, Z-score tells a value (x) is how many standard deviations below or above the population mean (µ). Zswap is an interesting way to extend your swap space with a memory write-back cache.Here is our simple explanation: When this feature is enabled an amount of machine’s RAM is put aside and when the system needs to use swap space it will first write to this area and when it is full then it will use the disk.

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