Re: [PATCH v2 0/4] Write-hint for FS journal

Keith Busch
2019-01-25T16:24:52Z

On Wed, Jan 09, 2019 at 09:00:57PM +0530, Kanchan Joshi wrote:
> Towards supporing write-hints/streams for filesystem journal.
>
> Here is the v1 patch for background -
> https://marc.info/?l=linux-fsdevel&m=154444637519020&w=2
>
> Changes since v1:
> - introduce four more hints for in-kernel use, as recommended by Dave chinner
> & Jens axboe. This isolates kernel-mode hints from user-mode ones.

The nvme driver disables streams if the controller doesn't support
BLK_MAX_WRITE_HINT number of streams, so this series breaks the feature
for controllers that only support up to 4.