vmcore-dmesg: avoid allocating large memory chunk for log buf
In kdump kernel, we got:
Saving vmcore-dmesg.txt
Failed to malloc 67108864 bytes for the logbuf: Cannot allocate memory
Apparently 64M is too luxury for a kdump kernel which only has 128M
in total.
We can avoid allocating such a large memory chunk, instead just allocate
a smaller chunk inside the loop each time.
Verify the result by comparing the vmcore-dmesg output with and without
this patch.
Cc: Simon Horman <horms@verge.net.au>
Reviewed-by: Dave Young <dyoung@redhat.com>
Reviewed-by: Pratyush Anand <panand@redhat.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
1 file changed
