linux-kernel - Re: [PATCH v2 6/7] nvme-pci: add device coredump support

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Message-ID: <20190507212241.GA7113@localhost.localdomain>
Date:   Tue, 7 May 2019 15:22:41 -0600
From:   Keith Busch <kbusch@...nel.org>
To:     "Heitke, Kenneth" <kenneth.heitke@...el.com>
Cc:     Akinobu Mita <akinobu.mita@...il.com>,
        linux-nvme@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Jens Axboe <axboe@...com>, Sagi Grimberg <sagi@...mberg.me>,
        Keith Busch <keith.busch@...el.com>,
        Minwoo Im <minwoo.im.dev@...il.com>,
        Johannes Berg <johannes@...solutions.net>,
        Christoph Hellwig <hch@....de>
Subject: Re: [PATCH v2 6/7] nvme-pci: add device coredump support

On Tue, May 07, 2019 at 02:31:41PM -0600, Heitke, Kenneth wrote:
> On 5/7/2019 10:58 AM, Akinobu Mita wrote:
> > +
> > +static int nvme_get_telemetry_log_blocks(struct nvme_ctrl *ctrl, void *buf,
> > +					 size_t bytes, loff_t offset)
> > +{
> > +	const size_t chunk_size = ctrl->max_hw_sectors * ctrl->page_size;
> 
> Just curious if chunk_size is correct since page size and block size can
> be different.

They're always different. ctrl->page_size is hard-coded to 4k, while
sectors are always 512b.