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SubjectRe: [PATCH 00/20] LightNVM: pblk patches for 4.13
Date
> On 27 Jun 2017, at 00.29, Jens Axboe <axboe@kernel.dk> wrote:
>
> On Mon, Jun 26 2017, Javier González wrote:
>> Hi Matias,
>>
>> Here you have the pblk patchset for this window.
>>
>> Apart from small fixes for LightNVM core and pblk, there are three
>> relevant changes:
>>
>> - Metadata for each line is no longer issued on a separate workqueue,
>> but instead, all I/Os are scheduled on the write thread. This allows
>> to have more control over LUN collisions. The result is that we can
>> use the full bandwidth of the device for user data. In the 4.12 pblk,
>> we use ~25% of the bandwidth for metadata.
>>
>> - The rate-limiter and GC have been tuned to keep the GC writer busy.
>> Also, capacity per line is guaranteed for GC I/O as we reach
>> capacity.
>>
>> - We have now a FTL state machine. This allows to fail gracefully to
>> user space in case of irrecoverable errors. This state machine will
>> be the base for the pblk's FTL log.
>>
>> The patches apply into your for-4.13/core. You can also find them in:
>
> Nope, they do not. Patch #7 fails, because it's not on top of the
> bio_set changes that went in a week or two ago. I hand applied that one,
> didn't find issues with the rest.
>
> But please remember to ensure that it applies on top of the current
> branch.

Thanks Jens. Won't happen again.

Javier

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