summaryrefslogtreecommitdiff
path: root/Documentation/admin-guide/kdump
diff options
context:
space:
mode:
Diffstat (limited to 'Documentation/admin-guide/kdump')
-rw-r--r--Documentation/admin-guide/kdump/kdump.rst10
-rw-r--r--Documentation/admin-guide/kdump/vmcoreinfo.rst8
2 files changed, 15 insertions, 3 deletions
diff --git a/Documentation/admin-guide/kdump/kdump.rst b/Documentation/admin-guide/kdump/kdump.rst
index cb30ca3df27c..a748e7eb4429 100644
--- a/Documentation/admin-guide/kdump/kdump.rst
+++ b/Documentation/admin-guide/kdump/kdump.rst
@@ -146,9 +146,9 @@ System kernel config options
CONFIG_SYSFS=y
Note that "sysfs file system support" might not appear in the "Pseudo
- filesystems" menu if "Configure standard kernel features (for small
- systems)" is not enabled in "General Setup." In this case, check the
- .config file itself to ensure that sysfs is turned on, as follows::
+ filesystems" menu if "Configure standard kernel features (expert users)"
+ is not enabled in "General Setup." In this case, check the .config file
+ itself to ensure that sysfs is turned on, as follows::
grep 'CONFIG_SYSFS' .config
@@ -533,6 +533,10 @@ the following command::
cp /proc/vmcore <dump-file>
+or use scp to write out the dump file between hosts on a network, e.g::
+
+ scp /proc/vmcore remote_username@remote_ip:<dump-file>
+
You can also use makedumpfile utility to write out the dump file
with specified options to filter out unwanted contents, e.g::
diff --git a/Documentation/admin-guide/kdump/vmcoreinfo.rst b/Documentation/admin-guide/kdump/vmcoreinfo.rst
index 3861a25faae1..8419019b6a88 100644
--- a/Documentation/admin-guide/kdump/vmcoreinfo.rst
+++ b/Documentation/admin-guide/kdump/vmcoreinfo.rst
@@ -494,6 +494,14 @@ architecture which is used to lookup the page-tables for the Virtual
addresses in the higher VA range (refer to ARMv8 ARM document for
more details).
+MODULES_VADDR|MODULES_END|VMALLOC_START|VMALLOC_END|VMEMMAP_START|VMEMMAP_END
+-----------------------------------------------------------------------------
+
+Used to get the correct ranges:
+ MODULES_VADDR ~ MODULES_END-1 : Kernel module space.
+ VMALLOC_START ~ VMALLOC_END-1 : vmalloc() / ioremap() space.
+ VMEMMAP_START ~ VMEMMAP_END-1 : vmemmap region, used for struct page array.
+
arm
===