1. 22 Feb, 2024 2 commits
  2. 21 Feb, 2024 2 commits
    • Feng Tang's avatar
      clocksource: Scale the watchdog read retries automatically · 2ed08e4b
      Feng Tang authored
      On a 8-socket server the TSC is wrongly marked as 'unstable' and disabled
      during boot time on about one out of 120 boot attempts:
      
          clocksource: timekeeping watchdog on CPU227: wd-tsc-wd excessive read-back delay of 153560ns vs. limit of 125000ns,
          wd-wd read-back delay only 11440ns, attempt 3, marking tsc unstable
          tsc: Marking TSC unstable due to clocksource watchdog
          TSC found unstable after boot, most likely due to broken BIOS. Use 'tsc=unstable'.
          sched_clock: Marking unstable (119294969739, 159204297)<-(125446229205, -5992055152)
          clocksource: Checking clocksource tsc synchronization from CPU 319 to CPUs 0,99,136,180,210,542,601,896.
          clocksource: Switched to clocksource hpet
      
      The reason is that for platform with a large number of CPUs, there are
      sporadic big or huge read latencies while reading the watchog/clocksource
      during boot or when system is under stress work load, and the frequency and
      maximum value of the latency goes up with the number of online CPUs.
      
      The cCurrent code already has logic to detect and filter such high latency
      case by reading the watchdog twice and checking the two deltas. Due to the
      randomness of the latency, there is a low probabilty that the first delta
      (latency) is big, but the second delta is small and looks valid. The
      watchdog code retries the readouts by default twice, which is not
      necessarily sufficient for systems with a large number of CPUs.
      
      There is a command line parameter 'max_cswd_read_retries' which allows to
      increase the number of retries, but that's not user friendly as it needs to
      be tweaked per system. As the number of required retries is proportional to
      the number of online CPUs, this parameter can be calculated at runtime.
      
      Scale and enlarge the number of retries according to the number of online
      CPUs and remove the command line parameter completely.
      
      [ tglx: Massaged change log and comments ]
      Signed-off-by: default avatarFeng Tang <feng.tang@intel.com>
      Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
      Tested-by: default avatarJin Wang <jin1.wang@intel.com>
      Tested-by: default avatarPaul E. McKenney <paulmck@kernel.org>
      Reviewed-by: default avatarWaiman Long <longman@redhat.com>
      Reviewed-by: default avatarPaul E. McKenney <paulmck@kernel.org>
      Link: https://lore.kernel.org/r/20240221060859.1027450-1-feng.tang@intel.com
      2ed08e4b
    • David Gow's avatar
      time/kunit: Use correct format specifier · e0a1284b
      David Gow authored
      'days' is a s64 (from div_s64), and so should use a %lld specifier.
      
      This was found by extending KUnit's assertion macros to use gcc's
      __printf attribute.
      
      Fixes: 27601055 ("time: Improve performance of time64_to_tm()")
      Signed-off-by: default avatarDavid Gow <davidgow@google.com>
      Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
      Link: https://lore.kernel.org/r/20240221092728.1281499-5-davidgow@google.com
      e0a1284b
  3. 20 Feb, 2024 10 commits
  4. 19 Feb, 2024 9 commits
  5. 18 Feb, 2024 6 commits
    • Linus Torvalds's avatar
      Linux 6.8-rc5 · b401b621
      Linus Torvalds authored
      b401b621
    • Linus Torvalds's avatar
      Merge tag 'kbuild-fixes-v6.8-2' of... · 6c160f16
      Linus Torvalds authored
      Merge tag 'kbuild-fixes-v6.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
      
      Pull Kbuild fixes from Masahiro Yamada:
      
       - Reformat nested if-conditionals in Makefiles with 4 spaces
      
       - Fix CONFIG_DEBUG_INFO_BTF builds for big endian
      
       - Fix modpost for module srcversion
      
       - Fix an escape sequence warning in gen_compile_commands.py
      
       - Fix kallsyms to ignore ARMv4 thunk symbols
      
      * tag 'kbuild-fixes-v6.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
        kallsyms: ignore ARMv4 thunks along with others
        modpost: trim leading spaces when processing source files list
        gen_compile_commands: fix invalid escape sequence warning
        kbuild: Fix changing ELF file type for output of gen_btf for big endian
        docs: kconfig: Fix grammar and formatting
        kbuild: use 4-space indentation when followed by conditionals
      6c160f16
    • Linus Torvalds's avatar
      Merge tag 'x86_urgent_for_v6.8_rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · ddac3d8b
      Linus Torvalds authored
      Pull x86 fix from Borislav Petkov:
      
       - Use a GB page for identity mapping only when memory of this size is
         requested so that mapping of reserved regions is prevented which
         would otherwise lead to system crashes on UV machines
      
      * tag 'x86_urgent_for_v6.8_rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/mm/ident_map: Use gbpages only where full GB page should be mapped.
      ddac3d8b
    • Linus Torvalds's avatar
      Merge tag 'irq_urgent_for_v6.8_rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 7cb7c32d
      Linus Torvalds authored
      Pull irq fixes from Borislav Petkov:
      
       - Fix GICv4.1 affinity update
      
       - Restore a quirk for ACPI-based GICv4 systems
      
       - Handle non-coherent GICv4 redistributors properly
      
       - Prevent spurious interrupts on Broadcom devices using GIC v3
         architecture
      
       - Other minor fixes
      
      * tag 'irq_urgent_for_v6.8_rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        irqchip/gic-v3-its: Fix GICv4.1 VPE affinity update
        irqchip/gic-v3-its: Restore quirk probing for ACPI-based systems
        irqchip/gic-v3-its: Handle non-coherent GICv4 redistributors
        irqchip/qcom-mpm: Fix IS_ERR() vs NULL check in qcom_mpm_init()
        irqchip/loongson-eiointc: Use correct struct type in eiointc_domain_alloc()
        irqchip/irq-brcmstb-l2: Add write memory barrier before exit
      7cb7c32d
    • Linus Torvalds's avatar
      Merge tag 'i2c-for-6.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux · 626721ed
      Linus Torvalds authored
      Pull i2c fixes from Wolfram Sang:
       "Two fixes for i801 and qcom-geni devices. Meanwhile, a fix from Arnd
        addresses a compilation error encountered during compile test on
        powerpc"
      
      * tag 'i2c-for-6.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
        i2c: i801: Fix block process call transactions
        i2c: pasemi: split driver into two separate modules
        i2c: qcom-geni: Correct I2C TRE sequence
      626721ed
    • Linus Torvalds's avatar
      Merge tag 'powerpc-6.8-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux · c02197fc
      Linus Torvalds authored
      Pull powerpc fixes from Michael Ellerman:
       "This is a bit of a big batch for rc4, but just due to holiday hangover
        and because I didn't send any fixes last week due to a late revert
        request. I think next week should be back to normal.
      
         - Fix ftrace bug on boot caused by exit text sections with
           '-fpatchable-function-entry'
      
         - Fix accuracy of stolen time on pseries since the switch to
           VIRT_CPU_ACCOUNTING_GEN
      
         - Fix a crash in the IOMMU code when doing DLPAR remove
      
         - Set pt_regs->link on scv entry to fix BPF stack unwinding
      
         - Add missing PPC_FEATURE_BOOKE on 64-bit e5500/e6500, which broke
           gdb
      
         - Fix boot on some 6xx platforms with STRICT_KERNEL_RWX enabled
      
         - Fix build failures with KASAN enabled and 32KB stack size
      
         - Some other minor fixes
      
        Thanks to Arnd Bergmann, Benjamin Gray, Christophe Leroy, David
        Engraf, Gaurav Batra, Jason Gunthorpe, Jiangfeng Xiao, Matthias
        Schiffer, Nathan Lynch, Naveen N Rao, Nicholas Piggin, Nysal Jan K.A,
        R Nageswara Sastry, Shivaprasad G Bhat, Shrikanth Hegde, Spoorthy,
        Srikar Dronamraju, and Venkat Rao Bagalkote"
      
      * tag 'powerpc-6.8-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
        powerpc/iommu: Fix the missing iommu_group_put() during platform domain attach
        powerpc/pseries: fix accuracy of stolen time
        powerpc/ftrace: Ignore ftrace locations in exit text sections
        powerpc/cputable: Add missing PPC_FEATURE_BOOKE on PPC64 Book-E
        powerpc/kasan: Limit KASAN thread size increase to 32KB
        Revert "powerpc/pseries/iommu: Fix iommu initialisation during DLPAR add"
        powerpc: 85xx: mark local functions static
        powerpc: udbg_memcons: mark functions static
        powerpc/kasan: Fix addr error caused by page alignment
        powerpc/6xx: set High BAT Enable flag on G2_LE cores
        selftests/powerpc/papr_vpd: Check devfd before get_system_loc_code()
        powerpc/64: Set task pt_regs->link to the LR value on scv entry
        powerpc/pseries/iommu: Fix iommu initialisation during DLPAR add
        powerpc/pseries/papr-sysparm: use u8 arrays for payloads
      c02197fc
  6. 17 Feb, 2024 11 commits