On Thursday 23 October 2008 17:49 Dave Hansen wrote: > On Thu, 2008-10-23 at 13:54 +0400, Andrey Mirkin wrote: > > We are putting special structure on stack, which is used at the very end > > of the whole restart procedure to restore complex states (ptrace is one > > of such cases). Right now I don't need to use this structure as we have a > > deal with simple cases, but reservation of 256 bytes on stack is needed > > for future. > > Wow. So you're saying that, if this patch is accepted, we simply need > to accept that anything being checkpointed will use an extra 256 bytes > of stack? Seems like something to perhaps put in the changelog rather > than some completely undocumented assembly nugget.
This 256 bytes will be used only during restart procedure and only by our module. As you can see in i386_ret_from_resume we are restoring it back. So, when process will return to user space it will not have extra 256 bytes reserved on stack already. I will add information about it to documentation and changelog. Andrey _______________________________________________ Containers mailing list [EMAIL PROTECTED] https://lists.linux-foundation.org/mailman/listinfo/containers _______________________________________________ Devel mailing list Devel@openvz.org https://openvz.org/mailman/listinfo/devel
