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Diffstat (limited to 'Documentation/kdump/kdump.txt')
| -rw-r--r-- | Documentation/kdump/kdump.txt | 31 |
1 files changed, 6 insertions, 25 deletions
diff --git a/Documentation/kdump/kdump.txt b/Documentation/kdump/kdump.txt index 9c7fd988e299..bec123e466ae 100644 --- a/Documentation/kdump/kdump.txt +++ b/Documentation/kdump/kdump.txt @@ -47,19 +47,12 @@ parameter. Optionally the size of the ELF header can also be passed when using the elfcorehdr=[size[KMG]@]offset[KMG] syntax. -With the dump-capture kernel, you can access the memory image, or "old -memory," in two ways: - -- Through a /dev/oldmem device interface. A capture utility can read the - device file and write out the memory in raw format. This is a raw dump - of memory. Analysis and capture tools must be intelligent enough to - determine where to look for the right information. - -- Through /proc/vmcore. This exports the dump as an ELF-format file that - you can write out using file copy commands such as cp or scp. Further, - you can use analysis tools such as the GNU Debugger (GDB) and the Crash - tool to debug the dump file. This method ensures that the dump pages are - correctly ordered. +With the dump-capture kernel, you can access the memory image through +/proc/vmcore. This exports the dump as an ELF-format file that you can +write out using file copy commands such as cp or scp. Further, you can +use analysis tools such as the GNU Debugger (GDB) and the Crash tool to +debug the dump file. This method ensures that the dump pages are correctly +ordered. Setup and Installation @@ -423,18 +416,6 @@ the following command: cp /proc/vmcore <dump-file> -You can also access dumped memory as a /dev/oldmem device for a linear -and raw view. To create the device, use the following command: - - mknod /dev/oldmem c 1 12 - -Use the dd command with suitable options for count, bs, and skip to -access specific portions of the dump. - -To see the entire memory, use the following command: - - dd if=/dev/oldmem of=oldmem.001 - Analysis ======== |