[Bug 209571] ZFS and NVMe performing poorly. TRIM requests stall I/O activity

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=209571

David NewHamlet <wheelcomplex at gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |wheelcomplex at gmail.com

--- Comment #2 from David NewHamlet <wheelcomplex at gmail.com> ---
I believe that this issue still on FreeBSD-12-CURRENT with dmesg log:

nvme0: async event occurred (log page id=0x2)
nvme0: temperature above threshold

and iostat -x 5
                        extended device statistics  
device       r/s     w/s     kr/s     kw/s  ms/r  ms/w  ms/o  ms/t qlen  %b  
nvd0           0       1      0.6    153.6  2384  3287     0  2664   80  99

I am glad to test any patch for this in my test environment.

ref:
https://lists.freebsd.org/pipermail/freebsd-stable/2015-January/081621.html

FreeBSD david-al.localdomain 12.0-CURRENT FreeBSD 12.0-CURRENT #11
5ea1f67b4ad(master)-dirty: Fri Nov 24 09:14:41 NZDT 2017    
root at n550jk.localdomain:/tank/cross/obj/12.0-amd64.amd64/sys/INITZ-NODEBUG 
amd64

01:00.0 Non-Volatile memory controller: Intel Corporation Device f1a5 (rev 03)

nvme0: <Generic NVMe Device> mem 0xdf200000-0xdf203fff irq 16 at device 0.0 on
pci1

nvd0: <INTEL SSDPEKKW512G7> NVMe namespace

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