Quoting Oren Laadan ([email protected]): > > > Serge E. Hallyn wrote: > > Quoting Oren Laadan ([email protected]): > >> > >> Serge E. Hallyn wrote: > >>> Quoting Oren Laadan ([email protected]): > >>>> Serge E. Hallyn wrote: > >>>>> Quoting Matt Helsley ([email protected]): > >>>>>>> @@ -401,6 +409,9 @@ char *ckpt_generate_fmt(struct ckpt_ctx *ctx, > >>>>>>> char *fmt) > >>>>>>> case 'E': > >>>>>>> len += sprintf(format+len, "[%s]", "err %d"); > >>>>>>> break; > >>>>>>> + case 'C': /* count of bytes read/written to checkpoint > >>>>>>> image */ > >>>>>>> + len += sprintf(format+len, "[%s]", "pos %d"); > >>>>>>> + break; > >>>>>> Instead we could always output ckpt->total and then we wouldn't need > >>>>>> %(C). I > >>>>>> suspect it's such a useful piece of information that it'll be repeated > >>>>>> in many/all format strings eventually. > >>>>> Yes, likewise %(T). If that's what we want to do. > >>>> I agree. For the cases when there is not task, can put "none" > >>>> > >>>>> Should we discuss here what we want an entry to look like? For both > >>>>> ckpt_write_err (to the checkpoint image) and ckpt_error()? > >>>>> > >>>> Yes please ! > >>> Actually %T isn't the current task, right, so it shouldn't always be > >>> prepended? > >>> It actually is only meaningful during checkpoint_task(), collect_objs(), > >>> and > >>> __tree_count_tasks? > >>> > >>> Ok, so how about: > >>> > >>> 1. ckpt_write_err() always also calls ckpt_error() (which in turn calls > >>> ckpt_debug). Avoid duplication which exists in several places > >>> right now. > >>> 2. We always prepend: > >>> > >>> > >>> [current->pid]:[ctx->root_pid]:[ctx->active_pid]:[ctx->errno][ctx->total] > >>> > >>> The %(X) expansions if specified come whereever they are in the fmt > >>> string (which is what's happening now with my patchset). > >> So somewhere should set ctx->errno during a checkpoint. > >> > >> I suppose active_pid is for restart, but it's redundant isn't it ? > >> (it's always active_pid) - is it the different between top-level pid-ns > >> and "current" pid-ns ? > > > > No, I figured it would be meaningful for instance in places like > > wait_task_active(). > > Perhaps then leave it out of the default printing, and have the > specific debug messages there write it explicitly.
Ok, so then current suggested format looks like: [current->pid]:[ctx->errno]:[ctx->total] Though is ctx->errno helpful even in restart? Or should we assume we'll figure that out through the msg in restore_notify_error()? Maybe do: [current->pid]=[task_pid_vnr(current)]:[ctx->total] > >> Instead of writing root_pid repeatedly, why not write sometime at the > >> beginning some "global" info about the checkpoint/restart ? (e.g. > >> the root_pid ...) > > > > Well it is written out (for restart) at the end, so I suppose I should > > switch restore_debug_free() to using ckpt_error() instead of ckpt_debug(). > > Yes, that will be helpful to reduce the noise :) -serge _______________________________________________ Containers mailing list [email protected] https://lists.linux-foundation.org/mailman/listinfo/containers _______________________________________________ Devel mailing list [email protected] https://openvz.org/mailman/listinfo/devel
