Re: PROBLEM: bcache related kernel BUG() since Linux 5.12

Hoi Coly,

The common applications I used, which for sure benefit from bcache:

  * Gnome 3.38
  * Libreoffice-7.0.6.2
  * teams-1.4.00.7556
  * Terminator
  * Evolution-3.38.4
  * Thunderbird evolution-3.38.4
  * thunderbird-78.10.1
  * firefox-88.0.1
  * google-chrome-stable-91.0.4472.77

So it's a typical desktop wordload with most I/O during startup of
applications.

For overall stress/stability testing:

  * Doom (steam/proton)
  * Rise of the Tombraider (steam)
  * The Witcher 3 (steam)

Overall stats after (should have done before) starting the steam games:

bash-5.0$ bcache-status

--- bcache ---

UUID                        b191549d-4455-43ca-b9b8-8e32dd68751c
Block Size                  512 B
Bucket Size                 512.00 KiB
Congested?                  False
Read Congestion             0.0ms
Write Congestion            20.0ms
Total Cache Size            128 GiB
Total Cache Used            128 GiB    (100%)
Total Cache Unused          0 B    (0%)
Evictable Cache             106 GiB    (83%)
Replacement Policy          [lru] fifo random
Cache Mode                  writethrough [writeback] writearound none
Total Hits                  3006361    (95%)
Total Misses                126463
Total Bypass Hits           4552    (68%)
Total Bypass Misses         2061
Total Bypassed              730.1 MiB
bash-5.0$

Hope this gives you a good impression of the workload.

Let me know if you like me to do specific stress tests.