linux-kernel - Re: [PATCH v3 5/7] nvme-pci: add device coredump infrastructure

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Message-ID: <CAC5umygobKcQ4NacG7cGkuqXR1qLUFCRBovWu5n=EOs=mu=esg@mail.gmail.com>
Date:   Tue, 14 May 2019 00:01:51 +0900
From:   Akinobu Mita <akinobu.mita@...il.com>
To:     Christoph Hellwig <hch@....de>
Cc:     linux-nvme@...ts.infradead.org,
        LKML <linux-kernel@...r.kernel.org>,
        Johannes Berg <johannes@...solutions.net>,
        Keith Busch <keith.busch@...el.com>, Jens Axboe <axboe@...com>,
        Sagi Grimberg <sagi@...mberg.me>,
        Minwoo Im <minwoo.im.dev@...il.com>,
        Kenneth Heitke <kenneth.heitke@...el.com>
Subject: Re: [PATCH v3 5/7] nvme-pci: add device coredump infrastructure

2019年5月13日(月) 23:03 Christoph Hellwig <hch@....de>:
>
> Usage of a scatterlist here is rather bogus as we never use
> it for dma mapping.  Why can't you store the various pages in a
> large bio_vec and then just issue that to the device in one
> get log page command?  (or at least a few if MDTS kicks in?)

OK.  I'll try to use bio_vec and see how it goes.