linux-kernel - Re: [PATCH v2 07/10] nvme-pci: Use PCI p2pmem subsystem to manage the CMB

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 for Android: free password hash cracker in your pocket

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

Date:   Mon, 5 Mar 2018 13:16:52 -0700
From:   Logan Gunthorpe <logang@...tatee.com>
To:     Jason Gunthorpe <jgg@...lanox.com>,
        Sagi Grimberg <sagi@...mberg.me>
Cc:     Jens Axboe <axboe@...nel.dk>, linux-block@...r.kernel.org,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        "linux-nvdimm@...ts.01.org" <linux-nvdimm@...ts.01.org>,
        linux-rdma@...r.kernel.org, linux-pci@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-nvme@...ts.infradead.org,
        Keith Busch <keith.busch@...el.com>,
        Alex Williamson <alex.williamson@...hat.com>,
        Jérôme Glisse <jglisse@...hat.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Max Gurtovoy <maxg@...lanox.com>,
        Christoph Hellwig <hch@....de>
Subject: Re: [PATCH v2 07/10] nvme-pci: Use PCI p2pmem subsystem to manage the
 CMB



On 05/03/18 01:10 PM, Jason Gunthorpe wrote:
> So when reading the above mlx code, we see the first wmb() being used
> to ensure that CPU stores to cachable memory are visible to the DMA
> triggered by the doorbell ring.

Oh, yes, that makes sense. Disregard my previous email as I was wrong.

Logan