Re: [Xen-devel] pv_ops dom0 x86_32 PAE kernel buildlog of missingsymbols...

["Marc - A. Dahlhaus [ Administration | Westermann GmbH ]" <mad@xxxxxx>]

Hello Jan,
hello Ian,


i did another build today (c/s 2239) and can confirm that only the
following two warnings are left:

ERROR: "blk_put_queue" [drivers/xen/blkback/blkbk.ko] undefined!
ERROR: "blk_get_queue" [drivers/xen/blkback/blkbk.ko] undefined!

Should i give Jan's patch a try or is another patch to address this
errors planed to be added to the patchset soon?

I ask this because i have some spare time and hardware over the weekend
i could use to do some boot tests. Maybe i can provide some valuable
logs then...


Marc

Am Donnerstag, den 11.12.2008, 13:19 +0000 schrieb Jan Beulich:
> >>> Ian Campbell <Ian.Campbell@xxxxxxxxxx> 11.12.08 13:00 >>>
> >ERROR: "alloc_empty_pages_and_pagevec" [drivers/xen/blkback/blkbk.ko]
> >undefined!
> >ERROR: "blk_put_queue" [drivers/xen/blkback/blkbk.ko] undefined!
> >ERROR: "free_empty_pages_and_pagevec" [drivers/xen/blkback/blkbk.ko] 
> >undefined!
> >ERROR: "blk_get_queue" [drivers/xen/blkback/blkbk.ko] undefined!
> >ERROR: "set_phys_to_machine" [drivers/xen/blkback/blkbk.ko] undefined!
> >
> >The *_empty_pages_and_pagevec and set_phys_to_machine are probably fair
> >game for an EXPORT_SYMBOL_GPL. The two blk subsystem ones are
> >suspicious, the fact that they aren't already exported suggests there is
> >another API we should be using.
> 
> I'd be curious if you can find one - in our 2.6.25 merge patch the only way
> to address this was to open-code what they do in blkback (short of re-adding
> the exports):
> 
> --- head-2008-12-08.orig/drivers/xen/blkback/blkback.c        2008-12-08 
> 13:24:54.000000000 +0100
> +++ head-2008-12-08/drivers/xen/blkback/blkback.c     2008-12-08 
> 13:24:57.000000000 +0100
> @@ -148,7 +148,7 @@ static void unplug_queue(blkif_t *blkif)
>               return;
>       if (blkif->plug->unplug_fn)
>               blkif->plug->unplug_fn(blkif->plug);
> -     blk_put_queue(blkif->plug);
> +     kobject_put(&blkif->plug->kobj);
>       blkif->plug = NULL;
>  }
>  
> @@ -159,7 +159,8 @@ static void plug_queue(blkif_t *blkif, s
>       if (q == blkif->plug)
>               return;
>       unplug_queue(blkif);
> -     blk_get_queue(q);
> +     WARN_ON(test_bit(QUEUE_FLAG_DEAD, &q->queue_flags));
> +     kobject_get(&q->kobj);
>       blkif->plug = q;
>  }
>  
> 
> Jan



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