mce=nobootlog
Disable boot machine check logging.
mce=tolerancelevel (number)
- 0: always panic, 1: panic if deadlock possible,
- 2: try to avoid panic, 3: never panic or exit (for testing)
- default is 1
+ 0: always panic on uncorrected errors, log corrected errors
+ 1: panic or SIGBUS on uncorrected errors, log corrected errors
+ 2: SIGBUS or log uncorrected errors, log corrected errors
+ 3: never panic or SIGBUS, log all errors (for testing only)
+ Default is 1
Can be also set using sysfs which is preferable.
nomce (for compatibility with i386): same as mce=off
SMP
- nosmp Only use a single CPU
-
- maxcpus=NUMBER only use upto NUMBER CPUs
-
- cpumask=MASK only use cpus with bits set in mask
-
additional_cpus=NUM Allow NUM more CPUs for hotplug
(defaults are specified by the BIOS, see Documentation/x86_64/cpu-hotplug-spec)
If a number, fakes CMDLINE nodes and ignores NUMA setup of the
actual machine. Otherwise, system memory is configured
depending on the sizes and coefficients listed. For example:
- numa=fake=2*512,1024,4*256
- gives two 512M nodes, a 1024M node, and four 256M nodes. The
- remaining system RAM is allocated to an additional node.
+ numa=fake=2*512,1024,4*256,*128
+ gives two 512M nodes, a 1024M node, four 256M nodes, and the
+ rest split into 128M chunks. If the last character of CMDLINE
+ is a *, the remaining memory is divided up equally among its
+ coefficient:
+ numa=fake=2*512,2*
+ gives two 512M nodes and the rest split into two nodes.
+ Otherwise, the remaining system RAM is allocated to an
+ additional node.
numa=hotadd=percent
Only allow hotadd memory to preallocate page structures upto