linux-kernel - Re: [PATCH rdma-next 3/4] lib/scatterlist: Add support in dynamic allocation of SG table from pages

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Tue, 8 Sep 2020 13:13:07 -0300
From:   Jason Gunthorpe <jgg@...dia.com>
To:     Christoph Hellwig <hch@....de>
CC:     Maor Gottlieb <maorg@...dia.com>,
        Leon Romanovsky <leon@...nel.org>,
        Doug Ledford <dledford@...hat.com>,
        <linux-kernel@...r.kernel.org>, <linux-rdma@...r.kernel.org>
Subject: Re: [PATCH rdma-next 3/4] lib/scatterlist: Add support in dynamic
 allocation of SG table from pages

On Tue, Sep 08, 2020 at 05:54:09PM +0200, Christoph Hellwig wrote:
> Given that ARCH_NO_SG_CHAIN is only true for alpha, parisc and a few
> arm subarchitectures I think just not supporting umem is probably
> cleared.  And eventually we'll need to drop ARCH_NO_SG_CHAIN entirely.

It would be fine to make INFINIBAND_USER_MEM depend on
!ARCH_NO_SG_CHAIN. alpha and parisc are not supported in rdma-core,
and the non-multiplatform ARM sub-arches are probably also the kind
that don't work with the userspace DMA model anyhow.

Jason