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x86/apic: Update the 'apic=' description of setting APIC driver

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There are two consumers of apic=: the APIC debug level and the low
level generic architecture code, but Linux just documented the first
one.

Append the second description.

Signed-off-by: Dou Liyang <douly.fnst@cn.fujitsu.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: peterz@infradead.org
Cc: rdunlap@infradead.org
Cc: corbet@lwn.net
Link: https://lkml.kernel.org/r/20171204040313.24824-2-douly.fnst@cn.fujitsu.com
This commit is contained in:
Dou Liyang 2017-12-04 12:03:13 +08:00 committed by Thomas Gleixner
parent 4fcab66934
commit 64e05d118e
1 changed files with 5 additions and 1 deletions
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6
Documentation/admin-guide/kernel-parameters.txt
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@ -328,11 +328,15 @@
not play well with APC CPU idle - disable it if you have
APC and your system crashes randomly.
apic= [APIC,X86-32] Advanced Programmable Interrupt Controller
apic= [APIC,X86] Advanced Programmable Interrupt Controller
Change the output verbosity whilst booting
Format: { quiet (default) | verbose | debug }
Change the amount of debugging information output
when initialising the APIC and IO-APIC components.
For X86-32, this can also be used to specify an APIC
driver name.
Format: apic=driver_name
Examples: apic=bigsmp
apic_extnmi= [APIC,X86] External NMI delivery setting
Format: { bsp (default) | all | none }