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-rw-r--r--docs/misc/xen-command-line.markdown14
1 files changed, 14 insertions, 0 deletions
diff --git a/docs/misc/xen-command-line.markdown b/docs/misc/xen-command-line.markdown
index 61f5328bdf..beb84625fa 100644
--- a/docs/misc/xen-command-line.markdown
+++ b/docs/misc/xen-command-line.markdown
@@ -188,6 +188,13 @@ The optional trailing `x` indicates that Xen should not automatically switch the
### cpuid\_mask\_xsave\_eax
### cpuidle
### cpuinfo
+### crashinfo_maxaddr
+> `= <size>`
+
+> Default: `4G`
+
+Specify the maximum address to allocate certain strucutres, if used in combination with the `low_crashinfo` command line option.
+
### crashkernel
### credit2\_balance\_over
### credit2\_balance\_under
@@ -273,6 +280,13 @@ Set the logging level for Xen. Any log message with equal more more importance
The optional `<rate-limited level>` options instructs which severities should be rate limited.
+### low\_crashinfo
+> `= none | min | all`
+
+> Default: `none` if not specified at all, or to `min` if `low\_crashinfo` is present without qualification.
+
+This option is only useful for hosts with a 32bit dom0 kernel, wishing to use kexec functionality in the case of a crash. It represents which data structures should be deliberatly allocated in low memory, so the crash kernel may find find them. Should be used in combination with `crashinfo_maxaddr`.
+
### max\_cstate
### max\_gsi\_irqs
### maxcpus