Re: [Xen-devel] help for snapshot

[Ian Campbell <ian.campbell@xxxxxxxxxx>]

On Tue, 2015-10-13 at 09:18 +0800, éå wrote:
> Hi,alls
> 
> I'm modifying the source code of xen-4.4.1. Specifically, I'm modifying
> the memory copy part of snapshot. I first put all memory pages to write
> protection, and then rewrite the write protection exception part of the
> code. After capture the exception  then save the memory page , and all
> memory page copy is complete, call the function xenaccess_teardown(xch,
> xenaccess), but there is a mistake:
> 
> libxl: error: libxl_utils.c:396:libxl_read_exactly: file/stream truncated
> reading ipc msg header from domain 3 save/restore helper stdout pipe
> libxl: error: libxl_exec.c:129:libxl_report_child_exitstatus: domain 3
> save/restore helper [-1] died due to fatal signal Segmentation fault
> (core dumped)
> Failed to save domain, resuming domain
> 
> Has anyone ever meet this kind of problem, and who can tell me the cause
> of the error.

Without knowing exactly what you have changed, probably not.

Ian.


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