On 10/31/16 at 03:15pm, Xunlei Pang wrote:
Add dracut-memdebug-ko.sh, install it to the dracut kdump module.
The principle is to use kernel trace to track buddy page allocation
events during kernel module loading(module_init), thus we can analyze
all the trace data and get the total memory consumption. as for large
slab allocation, it will fall into buddy, thus tracing "mm_page_alloc"
only should be enough for the purpose.
One major flaw of this method is that it consumes a lot of memory, users
should increase the crash kernel memory reservation or trace buffer size
(via "trace_buf_size=nn[KMG]") as needed.
Signed-off-by: Xunlei Pang <xlpang(a)redhat.com>
---
dracut-memdebug-ko.sh | 117 ++++++++++++++++++++++++++++++++++++++++++++++++++
Have not dig the details, just run the script I got:
./dracut-memdebug-ko.sh: line 117: return: can only `return' from a
function or sourced script
Thanks
Dave