On 07/12/2016 03:16 AM, Daniel Walker wrote: > > Hi, > > I found found that on my Powerpc machine there is some IO memory which > will cause the box to hang if I read it. It's a custom device that was > added to the board for a special purpose. > > I was looking for a way to exclude this memory from the dump, and while > doing that I found that kexec makes a list of memory segments that go > into the core file. I was wondering why most of the kexec architecture > don't appear to exclude device memory like what's listed in /proc/iomem. > > Is there a good reason why that's not the case? Kexec/Kdump is designed to capture entire old kernel's memory that will be available in /proc/vmcore. There is a different userspace tool called 'makedumpfile' (https://sourceforge.net/projects/makedumpfile/), which can be used to exclude certain memory pages from the dump while reading from /proc/vmcore. See if that helps you. Thanks, -Mahesh. > > Daniel > > _______________________________________________ > kexec mailing list > kexec at lists.infradead.org > http://lists.infradead.org/mailman/listinfo/kexec >
