RE: [Infiniband-access_layer] ib_dereg_mr fails

[Fab T. <fti...@in...>]

You are probably holding a spinlock or are running in a tasklet context.
Memory registration and deregistration has to be done in a thread =
context
that is able to block.  This is a limitation of the Mellanox HCA.

- Fab

> -----Original Message-----
> From: er...@te... =
[mailto:er...@te...]
> Sent: Thursday, May 27, 2004 5:55 AM
> To: inf...@li...
> Subject: [Infiniband-access_layer] ib_dereg_mr fails
>=20
> Hi,
>=20
> I'm regsitering memory using ib_reg_mem (in order to allow another
> application
> to perform RDMA write). Later, I want to free this memory using
> ib_dereg_mr. I
> get the following errors:
>=20
> TVPD(1): THH_hob_deregister_mr: NOT IN TASK CONTEXT)
> May 27 15:43:20 psl-178 kernel:  TVPD(1): kvp_mlx_mrw.c[609]:
> kvp_mlnx_deregister_mr: THH_hob_deregister_mr error (-255: HH_ERR)
> May 27 15:43:20 psl-178 kernel: srpl_retire() !ERROR!: ib_dereg_mr()
> failed !
> status =3D 0x2a
>=20
> Why?
>=20
> Thanks
> Erez
>=20
>=20
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