On 1/27/21 8:27 AM, Jan Kara wrote:

On Wed 13-01-21 11:09:24, Jan Kara wrote:

quoted

Hello,

this patch series contains one tiny cleanup and two relatively simple fixes
for BFQ I've uncovered when analyzing behavior of four parallel sequential
readers on one machine. The fio jobfile is like:

[global]
direct=0
ioengine=sync
invalidate=1
size=16g
rw=read
bs=4k

[reader]
numjobs=4
directory=/mnt

The first patch fixes a problem due to which the four bfq queues were getting
merged without a reason. The third patch fixes a problem where we were unfairly
raising bfq queue think time (leading to clearing of short_ttime and subsequent
reduction in throughput).

Jens, since Paolo has acked all the patches, can you please merge them?

Jens, ping? Can you please pick up these fixes? Thanks!

Yep, I've queued them up, thanks.

-- 
Jens Axboe