ckpt-v20-dev, ckpt-v21-rc1

Nathan Lynch ntl at pobox.com
Thu Apr 1 11:54:55 PDT 2010


On Thu, 2010-04-01 at 13:09 -0500, Nathan Lynch wrote:
> On Thu, 2010-04-01 at 09:17 -0500, Serge E. Hallyn wrote:
> > Alas after I sent this Nathan reported trouble on x86.  I haven't
> > gotten a x86-32 partition running yet so can't reproduce.  Does
> > anyone else have x86-32 with f12 they can test on?
> 
> More detail on this.  Seeing programs crash after restart on an i386 KVM
> guest with Fedora 12 userspace, e.g.
> 
> bash-simple.sh[3627] general protection ip:b76d8197 sp:bfe73904 error:0
> in libc-2.11.1.so[b760e000+16f000]
> 
> kernel: ckpt-v21-rc1 (v2.6.33-108-g9f4401c)
> 
> user-cr: ckpt-v20 ( 70a5c7630ce8dd933e60174aba6dc5cb08ea4b41) with
> CHECKPOINT_NONETNS flag added to checkpoint calls

Confirmed that behavior is the same with user-cr ckpt-v20-dev
(7bd883e17f25d36d66f9b550194c445df2f63e7e).

> 
> cr_tests: master (7bd883e17f25d36d66f9b550194c445df2f63e7e) with
> CHECKPOINT_NONETNS flag added to simple/ckpt.c.
> 
> The "simple" (self-checkpoint) testcase restarts successfully without
> crashing.  Everything else seems to get crashes as above.  As far as I
> can tell the memory map is restored correctly and from the kernel's POV
> the restart is successful.
> 
> FWIW, I don't see these crashes on another KVM guest where the only
> difference is that it is x86_64.




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