This series brings three different changes to the only memory event notifier on arm64 platform. These changes improve it's robustness while also enhancing debug capabilities during potential memory offlining error conditions.
This applies on 5.10-rc3 Changes in V5: - Added some more documentation in [PATCH 2/3] - Used for_each_mem_range() as for_each_memblock() has been dropped - validate_bootmem_online() just prints non-compliant early sections - validate_bootmem_online() does not prevent notifier registration - Folded two pr_err() statements into just a single one per Gavin Changes in V4: (https://lore.kernel.org/linux-arm-kernel/[email protected]/ - Dropped additional return in prevent_bootmem_remove_init() per Gavin - Rearranged memory section loop in prevent_bootmem_remove_notifier() per Gavin - Call out boot memory ranges for attempted offline or offline events Changes in V3: (https://patchwork.kernel.org/project/linux-arm-kernel/list/?series=352717) - Split the single patch into three patch series per Catalin - Trigger changed from setup_arch() to early_initcall() per Catalin - Renamed back memory_hotremove_notifier() as prevent_bootmem_remove_init() - validate_bootmem_online() is now called from prevent_bootmem_remove_init() per Catalin - Skip registering the notifier if validate_bootmem_online() returns negative Changes in V2: (https://patchwork.kernel.org/patch/11732161/) - Dropped all generic changes wrt MEM_CANCEL_OFFLINE reasons enumeration - Dropped all related (processing MEM_CANCEL_OFFLINE reasons) changes on arm64 - Added validate_boot_mem_online_state() that gets called with early_initcall() - Added CONFIG_MEMORY_HOTREMOVE check before registering memory notifier - Moved notifier registration i.e memory_hotremove_notifier into setup_arch() Changes in V1: (https://patchwork.kernel.org/project/linux-mm/list/?series=271237) Cc: Catalin Marinas <[email protected]> Cc: Will Deacon <[email protected]> Cc: Mark Rutland <[email protected]> Cc: Marc Zyngier <[email protected]> Cc: Steve Capper <[email protected]> Cc: Mark Brown <[email protected]> Cc: Gavin Shan <[email protected]> Cc: [email protected] Cc: [email protected] Anshuman Khandual (3): arm64/mm/hotplug: Register boot memory hot remove notifier earlier arm64/mm/hotplug: Enable MEM_OFFLINE event handling arm64/mm/hotplug: Ensure early memory sections are all online arch/arm64/mm/mmu.c | 95 +++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 91 insertions(+), 4 deletions(-) -- 2.20.1
