kernel-parameters.txt (3791a22374715b36ad806db13d8b2afb1b57fd36) kernel-parameters.txt (47010c040dec8af6347ec6259104fc13f7e7e30a)
1 acpi= [HW,ACPI,X86,ARM64]
2 Advanced Configuration and Power Interface
3 Format: { force | on | off | strict | noirq | rsdt |
4 copy_dsdt }
5 force -- enable ACPI if default was off
6 on -- enable ACPI but allow fallback to DT [arm64]
7 off -- disable ACPI if default was on
8 noirq -- do not use ACPI for IRQ routing

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1655 pages of a specific size at boot. The pair
1656 hugepagesz=X hugepages=Y can be specified once for
1657 each supported huge page size. Huge page sizes are
1658 architecture dependent. See also
1659 Documentation/admin-guide/mm/hugetlbpage.rst.
1660 Format: size[KMG]
1661
1662 hugetlb_free_vmemmap=
1 acpi= [HW,ACPI,X86,ARM64]
2 Advanced Configuration and Power Interface
3 Format: { force | on | off | strict | noirq | rsdt |
4 copy_dsdt }
5 force -- enable ACPI if default was off
6 on -- enable ACPI but allow fallback to DT [arm64]
7 off -- disable ACPI if default was on
8 noirq -- do not use ACPI for IRQ routing

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1655 pages of a specific size at boot. The pair
1656 hugepagesz=X hugepages=Y can be specified once for
1657 each supported huge page size. Huge page sizes are
1658 architecture dependent. See also
1659 Documentation/admin-guide/mm/hugetlbpage.rst.
1660 Format: size[KMG]
1661
1662 hugetlb_free_vmemmap=
1663 [KNL] Reguires CONFIG_HUGETLB_PAGE_FREE_VMEMMAP
1663 [KNL] Reguires CONFIG_HUGETLB_PAGE_OPTIMIZE_VMEMMAP
1664 enabled.
1665 Allows heavy hugetlb users to free up some more
1666 memory (7 * PAGE_SIZE for each 2MB hugetlb page).
1667 Format: { on | off (default) }
1668
1669 on: enable the feature
1670 off: disable the feature
1671
1664 enabled.
1665 Allows heavy hugetlb users to free up some more
1666 memory (7 * PAGE_SIZE for each 2MB hugetlb page).
1667 Format: { on | off (default) }
1668
1669 on: enable the feature
1670 off: disable the feature
1671
1672 Built with CONFIG_HUGETLB_PAGE_FREE_VMEMMAP_DEFAULT_ON=y,
1672 Built with CONFIG_HUGETLB_PAGE_OPTIMIZE_VMEMMAP_DEFAULT_ON=y,
1673 the default is on.
1674
1675 This is not compatible with memory_hotplug.memmap_on_memory.
1676 If both parameters are enabled, hugetlb_free_vmemmap takes
1677 precedence over memory_hotplug.memmap_on_memory.
1678
1679 hung_task_panic=
1680 [KNL] Should the hung task detector generate panics.

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5372
5373 slub_nomerge [MM, SLUB]
5374 Same with slab_nomerge. This is supported for legacy.
5375 See slab_nomerge for more information.
5376
5377 smart2= [HW]
5378 Format: <io1>[,<io2>[,...,<io8>]]
5379
1673 the default is on.
1674
1675 This is not compatible with memory_hotplug.memmap_on_memory.
1676 If both parameters are enabled, hugetlb_free_vmemmap takes
1677 precedence over memory_hotplug.memmap_on_memory.
1678
1679 hung_task_panic=
1680 [KNL] Should the hung task detector generate panics.

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5372
5373 slub_nomerge [MM, SLUB]
5374 Same with slab_nomerge. This is supported for legacy.
5375 See slab_nomerge for more information.
5376
5377 smart2= [HW]
5378 Format: <io1>[,<io2>[,...,<io8>]]
5379
5380 smp.csd_lock_timeout= [KNL]
5381 Specify the period of time in milliseconds
5382 that smp_call_function() and friends will wait
5383 for a CPU to release the CSD lock. This is
5384 useful when diagnosing bugs involving CPUs
5385 disabling interrupts for extended periods
5386 of time. Defaults to 5,000 milliseconds, and
5387 setting a value of zero disables this feature.
5388 This feature may be more efficiently disabled
5389 using the csdlock_debug- kernel parameter.
5390
5391 smsc-ircc2.nopnp [HW] Don't use PNP to discover SMC devices
5392 smsc-ircc2.ircc_cfg= [HW] Device configuration I/O port
5393 smsc-ircc2.ircc_sir= [HW] SIR base I/O port
5394 smsc-ircc2.ircc_fir= [HW] FIR base I/O port
5395 smsc-ircc2.ircc_irq= [HW] IRQ line
5396 smsc-ircc2.ircc_dma= [HW] DMA channel
5397 smsc-ircc2.ircc_transceiver= [HW] Transceiver type:
5398 0: Toshiba Satellite 1800 (GP data pin select)

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5380 smsc-ircc2.nopnp [HW] Don't use PNP to discover SMC devices
5381 smsc-ircc2.ircc_cfg= [HW] Device configuration I/O port
5382 smsc-ircc2.ircc_sir= [HW] SIR base I/O port
5383 smsc-ircc2.ircc_fir= [HW] FIR base I/O port
5384 smsc-ircc2.ircc_irq= [HW] IRQ line
5385 smsc-ircc2.ircc_dma= [HW] DMA channel
5386 smsc-ircc2.ircc_transceiver= [HW] Transceiver type:
5387 0: Toshiba Satellite 1800 (GP data pin select)

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