From: Jan Dakinevich <jan.dakinevich@virtuozzo.com>
To: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Doug Ledford <dledford@redhat.com>,
Yishai Hadas <yishaih@mellanox.com>,
Leon Romanovsky <leon@kernel.org>,
Parav Pandit <parav@mellanox.com>,
Mark Bloch <markb@mellanox.com>,
Daniel Jurgens <danielj@mellanox.com>,
Kees Cook <keescook@chromium.org>,
Kamal Heib <kamalheib1@gmail.com>,
Bart Van Assche <bvanassche@acm.org>,
linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org,
Denis Lunev <den@virtuozzo.com>,
Konstantin Khorenko <khorenko@virtuozzo.com>
Subject: Re: [PATCH 0/4] IB: decrease large contigous allocation
Date: Wed, 26 Sep 2018 18:48:09 +0300 [thread overview]
Message-ID: <20180926184809.5d37cdb7@virtuozzo.com> (raw)
In-Reply-To: <20180918144623.GI11367@ziepe.ca>
On Tue, 18 Sep 2018 08:46:23 -0600
Jason Gunthorpe <jgg@ziepe.ca> wrote:
> On Tue, Sep 18, 2018 at 04:03:42PM +0300, Jan Dakinevich wrote:
> > The size of mlx4_ib_device became too large to be allocated as
> > whole contigous block of memory. Currently it takes about 55K. On
> > architecture with 4K page it means 3rd order.
> >
> > This patch series makes an attempt to split mlx4_ib_device into
> > several parts and allocate them with less expensive kvzalloc
>
> Why split it up? Any reason not to just allocate the whole thing with
> kvzalloc?
>
To allocate whole ib_device with kvmalloc I will need replace kzalloc()
by kvzalloc() in ib_alloc_device() and then review allocation, to make
sure that no one uses this memory for DMA.
Although, I could introduce new ib_*alloc_device allocator for these
needs...
> Jason
--
Best regards
Jan Dakinevich
next prev parent reply other threads:[~2018-09-26 15:48 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-18 13:03 [PATCH 0/4] IB: decrease large contigous allocation Jan Dakinevich
2018-09-18 13:03 ` [PATCH 1/4] IB/core: introduce ->release() callback Jan Dakinevich
2018-09-18 14:44 ` Jason Gunthorpe
2018-09-18 13:03 ` [PATCH 2/4] IB/mlx4: move iboe field aside from mlx4_ib_dev Jan Dakinevich
2018-09-18 13:03 ` [PATCH 3/4] IB/mlx4: move pkeys " Jan Dakinevich
2018-09-18 13:03 ` [PATCH 4/4] IB/mlx4: move sriov " Jan Dakinevich
2018-09-18 14:46 ` [PATCH 0/4] IB: decrease large contigous allocation Jason Gunthorpe
2018-09-18 21:23 ` Leon Romanovsky
2018-09-26 15:43 ` Jan Dakinevich
2018-09-26 17:00 ` Leon Romanovsky
2018-09-26 15:48 ` Jan Dakinevich [this message]
2018-09-26 17:06 ` Jason Gunthorpe
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