-----Original Message----- From: John Garry [mailto:john.garry@xxxxxxxxxx] Subject: Re: [PATCH] scsi: scsi_host_queue_ready: increase busy count early >>> I'm not 100% sure about which data you need and where to find >>> nr_hw_queues exposed. >> >> nr_hw_queues is not available on 5.4 kernel via sysfs >> >> it's prob same as count of CPUs in the system >> >> or you can check number of hctxX folders in >> /sys/kernel/debug/block/sdX (need to be root, and debugfs enabled) > >> I figure sdev queue depth is 64 for all disks, like /dev/sdag, below. > > Yes, I send an example (one of two enclosures, 1 of 32 disks) but > verified, that they are the same. Confirmed my suspicions - it looks like the host is sent more commands than it can handle. We would need many disks to see this issue though, which you have. So for stable kernels, 6eb045e092ef is not in 5.4 . Next is 5.10, and I suppose it could be simply fixed by setting .host_tagset in scsi host template there. Thanks, John John, I tried this for smartpqi, so far, setting host_tagset = 1 seems to be working. The issue normally repros very quickly. I want to run a few more tests before calling this a good fix. Thanks for your suggestion, Don Brace ---- [root@cleddyf ~]# lsscsi [0:0:0:0] disk Generic- SD/MMC CRW 1.00 /dev/sdc [1:0:0:0] disk ASMT 2115 0 /dev/sda [2:0:0:0] disk ASMT 2115 0 /dev/sdb [3:0:0:0] disk HP EG0900FBLSK HPD7 /dev/sdd [3:0:1:0] disk HP EG0900FBLSK HPD7 /dev/sde [3:0:2:0] disk HP EG0900FBLSK HPD7 /dev/sdf [3:0:3:0] disk HP EH0300FBQDD HPD5 /dev/sdg [3:0:4:0] disk HP EG0900FDJYR HPD4 /dev/sdh [3:0:5:0] disk HP EG0300FCVBF HPD9 /dev/sdi [3:0:6:0] disk HP EG0900FBLSK HPD7 /dev/sdj [3:0:7:0] disk HP EG0900FBLSK HPD7 /dev/sdk [3:0:8:0] disk HP EG0900FBLSK HPD7 /dev/sdl [3:0:9:0] disk HP MO0200FBRWB HPD9 /dev/sdm [3:0:10:0] disk HP MM0500FBFVQ HPD8 /dev/sdn [3:0:11:0] disk ATA MM0500GBKAK HPGC /dev/sdo [3:0:12:0] disk HP EG0900FBVFQ HPDC /dev/sdp [3:0:13:0] disk HP VO006400JWZJT HP00 /dev/sdq [3:0:14:0] disk HP VO015360JWZJN HP00 /dev/sdr [3:0:15:0] enclosu HP D3700 5.04 - [3:0:16:0] enclosu HP D3700 5.04 - [3:0:17:0] enclosu HPE Smart Adapter 3.00 - [3:1:0:0] disk HPE LOGICAL VOLUME 3.00 /dev/sds [3:2:0:0] storage HPE P408e-p SR Gen10 3.00 - --- [global] ioengine=libaio ; rw=randwrite ; percentage_random=40 rw=write size=100g bs=4k direct=1 ramp_time=15 ; filename=/mnt/fio_test ; cpus_allowed=0-27 iodepth=1024 [/dev/sdd] [/dev/sde] [/dev/sdf] [/dev/sdg] [/dev/sdh] [/dev/sdi] [/dev/sdj] [/dev/sdk] [/dev/sdl] [/dev/sdm] [/dev/sdn] [/dev/sdo] [/dev/sdp] [/dev/sdq] [/dev/sdr]
