kcopyd_client_create allocation failure on creating snapshots

kcopyd_client_create allocation failure on creating snapshots

[Igor Yanover]

    Hi!
    I've got the following error, while trying to create many
snapshots ( > 32 ) :
"device-mapper: : Could not create kcopyd client". After some digging,
I found out that the reason is resize_pool() in dm-io.c trying to do
mempool_resize that is probably too large. I've seen that the issue
has been raised in this list before at:
https://www.redhat.com/archives/dm-devel/2005-April/msg00080.html,
with the same conclusions, but there was no discussion and as far I
can seen, the code has not changed since. I understand that the
correct fix would be to use per-kclient pools.
Is anyone planning to work/already working on this?

     Thanks,
          Igor

Re: kcopyd_client_create allocation failure on creating snapshots

[Ming Zhang]

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yes, i fired this while no further discussion found. i also want to know
any solution regarding this. 

ming

On Mon, 2005-05-23 at 10:25 +0200, Igor Yanover wrote:
>     Hi!
>     I've got the following error, while trying to create many
> snapshots ( > 32 ) :
> "device-mapper: : Could not create kcopyd client". After some digging,
> I found out that the reason is resize_pool() in dm-io.c trying to do
> mempool_resize that is probably too large. I've seen that the issue
> has been raised in this list before at:
> https://www.redhat.com/archives/dm-devel/2005-April/msg00080.html,
> with the same conclusions, but there was no discussion and as far I
> can seen, the code has not changed since. I understand that the
> correct fix would be to use per-kclient pools.
> Is anyone planning to work/already working on this?
> 
>      Thanks,
>           Igor
> 
> --
> dm-devel mailing list
> dm-devel@redhat.com
> https://www.redhat.com/mailman/listinfo/dm-devel

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