RE: [Infiniband-access_layer] ib_dereg_mr fails

[<er...@te...>]

So, how can I deregister this memory? I understand that I cannot do that =
while
holding a spinlock. You said that "migrating the deregistration call to b=
e
asynchronous wouldn't be difficult". What do you mean by that & how can I=
 do
that?
BTW - when the SRP driver was released, was it possible to release memory=
 when
holding a spinlock? This may explain the current problem.

Quoting "Hefty, Sean" <sea...@in...>:

> >I'm trying to release the memory from a CQ callback function. This
> command
> >runs after running cl_spinlock_acquire.
> >However, this code was released as a part of the SF project code (SRP)=
,
> so
> >I assumed that it should work fine...
>=20
> That call should not have been made from a CQ callback.  Memory
> registration/deregistration needs to be done without holding a spinlock=
.
>=20
> Note that this is a general issue with the Mellanox HCA, and the reason
> that most of the IBAL destruction APIs work asynchronously is to allow
> destroy calls to be made from any callback.  We made a design decision
> not to use asynchronous memory deregistration for security purposes, bu=
t
> migrating the deregistration call to be asynchronous wouldn't be
> difficult.
>=20
>=20
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>=20