selects a performance level in this range and appropriate
to the current workload.
+ amd_prefcore=
+ [X86]
+ disable
+ Disable amd-pstate preferred core.
+
amijoy.map= [HW,JOY] Amiga joystick support
Map of devices attached to JOY0DAT and JOY1DAT
Format: <a>,<b>
panels may send no or incorrect EDID data sets.
This parameter allows to specify an EDID data sets
in the /lib/firmware directory that are used instead.
- Generic built-in EDID data sets are used, if one of
- edid/1024x768.bin, edid/1280x1024.bin,
- edid/1680x1050.bin, or edid/1920x1080.bin is given
- and no file with the same name exists. Details and
- instructions how to build your own EDID data are
- available in Documentation/admin-guide/edid.rst. An EDID
- data set will only be used for a particular connector,
- if its name and a colon are prepended to the EDID
- name. Each connector may use a unique EDID data
- set by separating the files with a comma. An EDID
+ An EDID data set will only be used for a particular
+ connector, if its name and a colon are prepended to
+ the EDID name. Each connector may use a unique EDID
+ data set by separating the files with a comma. An EDID
data set with no connector name will be used for
any connectors not explicitly specified.
The above will cause the "foo" tracing instance to trigger
a snapshot at the end of boot up.
- ftrace_dump_on_oops[=orig_cpu]
+ ftrace_dump_on_oops[=2(orig_cpu) | =<instance>][,<instance> |
+ ,<instance>=2(orig_cpu)]
[FTRACE] will dump the trace buffers on oops.
- If no parameter is passed, ftrace will dump
- buffers of all CPUs, but if you pass orig_cpu, it will
- dump only the buffer of the CPU that triggered the
- oops.
+ If no parameter is passed, ftrace will dump global
+ buffers of all CPUs, if you pass 2 or orig_cpu, it
+ will dump only the buffer of the CPU that triggered
+ the oops, or the specific instance will be dumped if
+ its name is passed. Multiple instance dump is also
+ supported, and instances are separated by commas. Each
+ instance supports only dump on CPU that triggered the
+ oops by passing 2 or orig_cpu to it.
+
+ ftrace_dump_on_oops=foo=orig_cpu
+
+ The above will dump only the buffer of "foo" instance
+ on CPU that triggered the oops.
+
+ ftrace_dump_on_oops,foo,bar=orig_cpu
+
+ The above will dump global buffer on all CPUs, the
+ buffer of "foo" instance on all CPUs and the buffer
+ of "bar" instance on CPU that triggered the oops.
ftrace_filter=[function-list]
[FTRACE] Limit the functions traced by the function
(that will set all pages holding image data
during restoration read-only).
+ hibernate.compressor= [HIBERNATION] Compression algorithm to be
+ used with hibernation.
+ Format: { lzo | lz4 }
+ Default: lzo
+
+ lzo: Select LZO compression algorithm to
+ compress/decompress hibernation image.
+
+ lz4: Select LZ4 compression algorithm to
+ compress/decompress hibernation image.
+
highmem=nn[KMG] [KNL,BOOT,EARLY] forces the highmem zone to have an exact
size of <nn>. This works even on boxes that have no
highmem otherwise. This also works to reduce highmem
bit 4: print ftrace buffer
bit 5: print all printk messages in buffer
bit 6: print all CPUs backtrace (if available in the arch)
+ bit 7: print only tasks in uninterruptible (blocked) state
*Be aware* that this option may print a _lot_ of lines,
so there are risks of losing older messages in the log.
Use this option carefully, maybe worth to setup a