From: "Bharath Ramesh" <bramesh-PjAqaU27lzQ@public.gmane.org>
To: 'Roland Dreier' <rdreier-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org>
Cc: linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: RE: Maximum size for memory registration (ibv_reg_mr)
Date: Fri, 24 Sep 2010 18:42:10 -0400 [thread overview]
Message-ID: <037101cb5c39$b98036f0$2c80a4d0$@edu> (raw)
In-Reply-To: <adar5giahvd.fsf-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org>
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> -----Original Message-----
> From: Roland Dreier [mailto:rdreier-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org]
>
> > Is there any limit on the maximum size of memory that can be
> registered
> > using ibv_reg_mr. I am using OFED-1.4.2 stack, and when I try to
> pass a size
> > greater than 16GB ibv_reg_mr returns NULL. The total amount of
> physical
> > memory on the node is 48GB, max locked memory(ulimit -l) is set to
> > unlimited.
>
> The limit depends on the HCA.
max_mr_size returned by calling ibv_devinfo is 0xffffffffffffffff. Does this
mean the size is unlimited?
Regards,
Bharath
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next prev parent reply other threads:[~2010-09-24 22:42 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-24 22:12 Maximum size for memory registration (ibv_reg_mr) Bharath Ramesh
2010-09-24 22:36 ` Roland Dreier
[not found] ` <adar5giahvd.fsf-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org>
2010-09-24 22:42 ` Bharath Ramesh [this message]
2010-09-24 22:47 ` Roland Dreier
[not found] ` <adamxr6ahd3.fsf-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org>
2010-09-24 22:52 ` Bharath Ramesh
2010-09-24 22:57 ` Roland Dreier
[not found] ` <adaiq1uagwi.fsf-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org>
2010-09-27 11:18 ` Tziporet Koren
2010-10-07 9:40 ` Or Gerlitz
[not found] ` <4CAD9572.5060507-hKgKHo2Ms0FWk0Htik3J/w@public.gmane.org>
2010-10-07 10:13 ` Eli Cohen
2010-10-07 11:21 ` Or Gerlitz
[not found] ` <4CADAD40.8080202-smomgflXvOZWk0Htik3J/w@public.gmane.org>
2010-10-07 11:49 ` Eli Cohen
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