> From: Oliver Sang <oliver.sang@xxxxxxxxx> > Sent: Tuesday, December 28, 2021 5:49 AM > ... > Hi Jens, Dexuan, > > On Tue, Dec 28, 2021 at 10:30:43AM +0800, Yin Fengwei wrote: > > Hi Jens, Dexuan, > > > > On 12/20/2021 1:15 PM, Dexuan Cui wrote: > > >> From: Jens Axboe <axboe@xxxxxxxxx> > > >> Sent: Sunday, December 19, 2021 7:28 AM > > >>> ... > > >>> Dexuan, can you test this for your test case too? I'm going to queue > > >>> up a revert for -rc6 just in case. > > >> > > >> This one should be better... > > >> ... > > >> Jens Axboe > > > > > > Hi Jens, sorry -- unluckily I lost the test environment.. :-( > > > I pinged the user to set up the test environment again, but he's > > > on vacation till the beginning of January. > > > > We hit this issue in our testing env also and will help to verify > > your fixing patch. Thanks. > > as we reported in [1], we found cb2ac2912a cause big regressions in fxmark > tests. > "[block] cb2ac2912a: > fxmark.ssd_f2fs_dbench_client_4_bufferedio.works/sec -66.0% regression" > > By applying the patch supplied by Jens Axboe in previous thread directly > upon cb2ac2912a, we confirmed the regression could be fixed: > ... > > Regards > > Yin, Fengwei Hi Jens, Fengwei, I finally regained my test evnironment and tested Jens's Dec-19 patch (see https://www.spinics.net/lists/linux-block/msg78065.html) and it also worked fine for me, i.e. no excessive CPU utilization even with the default dm_mod.dm_mq_queue_depth=2048. BTW, Jen's patch is not in the mainline yet. I tested it using the linux-block tree. Thanks, -- Dexuan
