2019年5月14日(火) 0:23 Chaitanya Kulkarni :
>
> On 05/13/2019 12:46 AM, Minwoo Im wrote:
> >> +static int nvme_get_telemetry_log_blocks(struct nvme_ctrl *ctrl, void
> >> *buf,
> >> + size_t bytes, loff_t offset)
> >> +{
> >> +loff_t pos = 0;
> >> +u32 chunk_
On 05/13/2019 12:46 AM, Minwoo Im wrote:
>> +static int nvme_get_telemetry_log_blocks(struct nvme_ctrl *ctrl, void *buf,
>> + size_t bytes, loff_t offset)
>> +{
>> +loff_t pos = 0;
>> +u32 chunk_size;
>> +
>> +if (check_mul_overflow(ctrl->max_hw_secto
2019年5月13日(月) 23:03 Christoph Hellwig :
>
> 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.
2019年5月13日(月) 22:55 Keith Busch :
>
> On Sun, May 12, 2019 at 08:54:15AM -0700, Akinobu Mita wrote:
> > +static void nvme_coredump_logs(struct nvme_dev *dev)
> > +{
> > + struct dev_coredumpm_bulk_data *bulk_data;
> > +
> > + if (!dev->dumps)
> > + return;
> > +
> > + bulk_d
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?)
On Sun, May 12, 2019 at 08:54:15AM -0700, Akinobu Mita wrote:
> +static void nvme_coredump_logs(struct nvme_dev *dev)
> +{
> + struct dev_coredumpm_bulk_data *bulk_data;
> +
> + if (!dev->dumps)
> + return;
> +
> + bulk_data = nvme_coredump_alloc(dev, 1);
> + if (!bulk_d
> +static int nvme_get_telemetry_log_blocks(struct nvme_ctrl *ctrl, void *buf,
> + size_t bytes, loff_t offset)
> +{
> + loff_t pos = 0;
> + u32 chunk_size;
> +
> + if (check_mul_overflow(ctrl->max_hw_sectors, 512u, &chunk_size))
> + chun
This provides three functions to implement the device coredump for nvme
driver.
nvme_coredump_init() - This function is called when the driver determines
to start collecting device coredump. The snapshots of the controller
registers, and admin and IO queues are captured by this.
nvme_coredump_l
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