Verification with bionic-proposed of fio results. For details see comment #5.
Overall performance has improved on the -proposed kernel (tested in build without the patchset) and the patchset as is in the -proposed kernel did improve it a bit more. The results below show 3 results for each cache-mode on (rand)rw tests, in: - 'orig'inal kernel (4.15.0-55), - 'test' kernel (4.15.0-55 + patchset), - 'tpwo' test-proposed without patchset, - 'tpwp' test-proposed with patchset (i.e., bionic-proposed) All numbers are good/better. fio.test1 fio.orig fio.test.none.randrw.log: read: IOPS=79, BW=318KiB/s (325kB/s)(55.9MiB/180092msec) fio.test2 fio.orig fio.test.none.randrw.log: read: IOPS=81, BW=328KiB/s (336kB/s)(57.7MiB/180137msec) fio.test3 fio.orig fio.test.none.randrw.log: read: IOPS=80, BW=324KiB/s (331kB/s)(56.9MiB/180142msec) fio.test1 fio.test fio.test.none.randrw.log: read: IOPS=81, BW=326KiB/s (334kB/s)(57.4MiB/180222msec) fio.test2 fio.test fio.test.none.randrw.log: read: IOPS=80, BW=324KiB/s (331kB/s)(56.0MiB/180177msec) fio.test3 fio.test fio.test.none.randrw.log: read: IOPS=77, BW=312KiB/s (319kB/s)(54.8MiB/180103msec) fio.test1 fio.tpwo fio.test.none.randrw.log: read: IOPS=189, BW=759KiB/s (777kB/s)(133MiB/180047msec) fio.test2 fio.tpwo fio.test.none.randrw.log: read: IOPS=192, BW=768KiB/s (787kB/s)(135MiB/180052msec) fio.test3 fio.tpwo fio.test.none.randrw.log: read: IOPS=190, BW=760KiB/s (778kB/s)(134MiB/180054msec) fio.test1 fio.tpwp fio.test.none.randrw.log: read: IOPS=212, BW=849KiB/s (869kB/s)(149MiB/180080msec) fio.test2 fio.tpwp fio.test.none.randrw.log: read: IOPS=211, BW=845KiB/s (865kB/s)(149MiB/180063msec) fio.test3 fio.tpwp fio.test.none.randrw.log: read: IOPS=210, BW=843KiB/s (863kB/s)(148MiB/180051msec) fio.test1 fio.orig fio.test.none.rw.log: read: IOPS=81.8k, BW=319MiB/s (335MB/s)(56.2GiB/180023msec) fio.test2 fio.orig fio.test.none.rw.log: read: IOPS=82.7k, BW=323MiB/s (339MB/s)(56.8GiB/180070msec) fio.test3 fio.orig fio.test.none.rw.log: read: IOPS=82.8k, BW=323MiB/s (339MB/s)(56.9GiB/180006msec) fio.test1 fio.test fio.test.none.rw.log: read: IOPS=83.2k, BW=325MiB/s (341MB/s)(57.1GiB/180035msec) fio.test2 fio.test fio.test.none.rw.log: read: IOPS=85.2k, BW=333MiB/s (349MB/s)(58.5GiB/180030msec) fio.test3 fio.test fio.test.none.rw.log: read: IOPS=82.9k, BW=324MiB/s (339MB/s)(56.9GiB/180003msec) fio.test1 fio.tpwo fio.test.none.rw.log: read: IOPS=119k, BW=463MiB/s (486MB/s)(19.0GiB/44178msec) fio.test2 fio.tpwo fio.test.none.rw.log: read: IOPS=120k, BW=468MiB/s (491MB/s)(19.0GiB/43727msec) fio.test3 fio.tpwo fio.test.none.rw.log: read: IOPS=123k, BW=481MiB/s (505MB/s)(19.0GiB/42553msec) fio.test1 fio.tpwp fio.test.none.rw.log: read: IOPS=128k, BW=501MiB/s (525MB/s)(19.0GiB/40860msec) fio.test2 fio.tpwp fio.test.none.rw.log: read: IOPS=134k, BW=525MiB/s (551MB/s)(19.0GiB/38971msec) fio.test3 fio.tpwp fio.test.none.rw.log: read: IOPS=144k, BW=563MiB/s (591MB/s)(19.0GiB/36352msec) fio.test1 fio.orig fio.test.writearound.randrw.log: read: IOPS=78, BW=315KiB/s (322kB/s)(55.3MiB/180123msec) fio.test2 fio.orig fio.test.writearound.randrw.log: read: IOPS=78, BW=313KiB/s (321kB/s)(55.1MiB/180114msec) fio.test3 fio.orig fio.test.writearound.randrw.log: read: IOPS=81, BW=325KiB/s (333kB/s)(57.2MiB/180108msec) fio.test1 fio.test fio.test.writearound.randrw.log: read: IOPS=81, BW=324KiB/s (332kB/s)(57.0MiB/180107msec) fio.test2 fio.test fio.test.writearound.randrw.log: read: IOPS=78, BW=315KiB/s (323kB/s)(55.4MiB/180069msec) fio.test3 fio.test fio.test.writearound.randrw.log: read: IOPS=78, BW=312KiB/s (320kB/s)(54.9MiB/180109msec) fio.test1 fio.tpwo fio.test.writearound.randrw.log: read: IOPS=188, BW=754KiB/s (772kB/s)(133MiB/180033msec) fio.test2 fio.tpwo fio.test.writearound.randrw.log: read: IOPS=190, BW=760KiB/s (778kB/s)(134MiB/180073msec) fio.test3 fio.tpwo fio.test.writearound.randrw.log: read: IOPS=190, BW=762KiB/s (781kB/s)(134MiB/180060msec) fio.test1 fio.tpwp fio.test.writearound.randrw.log: read: IOPS=210, BW=840KiB/s (861kB/s)(148MiB/180100msec) fio.test2 fio.tpwp fio.test.writearound.randrw.log: read: IOPS=212, BW=848KiB/s (869kB/s)(149MiB/180065msec) fio.test3 fio.tpwp fio.test.writearound.randrw.log: read: IOPS=211, BW=846KiB/s (867kB/s)(149MiB/180088msec) fio.test1 fio.orig fio.test.writearound.rw.log: read: IOPS=81.8k, BW=319MiB/s (335MB/s)(56.2GiB/180046msec) fio.test2 fio.orig fio.test.writearound.rw.log: read: IOPS=81.6k, BW=319MiB/s (334MB/s)(56.0GiB/180004msec) fio.test3 fio.orig fio.test.writearound.rw.log: read: IOPS=82.7k, BW=323MiB/s (339MB/s)(56.8GiB/180002msec) fio.test1 fio.test fio.test.writearound.rw.log: read: IOPS=82.8k, BW=323MiB/s (339MB/s)(56.9GiB/180097msec) fio.test2 fio.test fio.test.writearound.rw.log: read: IOPS=79.6k, BW=311MiB/s (326MB/s)(54.6GiB/180003msec) fio.test3 fio.test fio.test.writearound.rw.log: read: IOPS=81.7k, BW=319MiB/s (335MB/s)(56.1GiB/180056msec) fio.test1 fio.tpwo fio.test.writearound.rw.log: read: IOPS=153k, BW=596MiB/s (625MB/s)(19.0GiB/34356msec) fio.test2 fio.tpwo fio.test.writearound.rw.log: read: IOPS=119k, BW=466MiB/s (488MB/s)(19.0GiB/43978msec) fio.test3 fio.tpwo fio.test.writearound.rw.log: read: IOPS=130k, BW=507MiB/s (532MB/s)(19.0GiB/40388msec) fio.test1 fio.tpwp fio.test.writearound.rw.log: read: IOPS=131k, BW=511MiB/s (536MB/s)(19.0GiB/40037msec) fio.test2 fio.tpwp fio.test.writearound.rw.log: read: IOPS=257k, BW=1004MiB/s (1053MB/s)(19.0GiB/20386msec) fio.test3 fio.tpwp fio.test.writearound.rw.log: read: IOPS=136k, BW=530MiB/s (556MB/s)(19.0GiB/38618msec) fio.test1 fio.orig fio.test.writeback.randrw.log: read: IOPS=81, BW=327KiB/s (335kB/s)(57.5MiB/180146msec) fio.test2 fio.orig fio.test.writeback.randrw.log: read: IOPS=79, BW=318KiB/s (326kB/s)(55.9MiB/180075msec) fio.test3 fio.orig fio.test.writeback.randrw.log: read: IOPS=80, BW=321KiB/s (329kB/s)(56.5MiB/180103msec) fio.test1 fio.test fio.test.writeback.randrw.log: read: IOPS=80, BW=324KiB/s (331kB/s)(56.9MiB/180082msec) fio.test2 fio.test fio.test.writeback.randrw.log: read: IOPS=79, BW=317KiB/s (325kB/s)(55.8MiB/180106msec) fio.test3 fio.test fio.test.writeback.randrw.log: read: IOPS=79, BW=316KiB/s (324kB/s)(55.6MiB/180144msec) fio.test1 fio.tpwo fio.test.writeback.randrw.log: read: IOPS=179, BW=720KiB/s (737kB/s)(127MiB/180058msec) fio.test2 fio.tpwo fio.test.writeback.randrw.log: read: IOPS=189, BW=760KiB/s (778kB/s)(134MiB/180073msec) fio.test3 fio.tpwo fio.test.writeback.randrw.log: read: IOPS=190, BW=763KiB/s (781kB/s)(134MiB/180072msec) fio.test1 fio.tpwp fio.test.writeback.randrw.log: read: IOPS=209, BW=837KiB/s (857kB/s)(147MiB/180087msec) fio.test2 fio.tpwp fio.test.writeback.randrw.log: read: IOPS=207, BW=832KiB/s (852kB/s)(146MiB/180132msec) fio.test3 fio.tpwp fio.test.writeback.randrw.log: read: IOPS=211, BW=845KiB/s (865kB/s)(149MiB/180100msec) fio.test1 fio.orig fio.test.writeback.rw.log: read: IOPS=72.4k, BW=283MiB/s (297MB/s)(49.7GiB/180097msec) fio.test2 fio.orig fio.test.writeback.rw.log: read: IOPS=97.6k, BW=381MiB/s (400MB/s)(67.1GiB/180238msec) fio.test3 fio.orig fio.test.writeback.rw.log: read: IOPS=82.9k, BW=324MiB/s (339MB/s)(56.9GiB/180002msec) fio.test1 fio.test fio.test.writeback.rw.log: read: IOPS=81.5k, BW=318MiB/s (334MB/s)(55.0GiB/180002msec) fio.test2 fio.test fio.test.writeback.rw.log: read: IOPS=72.1k, BW=282MiB/s (295MB/s)(49.5GiB/180165msec) fio.test3 fio.test fio.test.writeback.rw.log: read: IOPS=81.8k, BW=319MiB/s (335MB/s)(56.2GiB/180037msec) fio.test1 fio.tpwo fio.test.writeback.rw.log: read: IOPS=115k, BW=451MiB/s (473MB/s)(19.0GiB/45400msec) fio.test2 fio.tpwo fio.test.writeback.rw.log: read: IOPS=125k, BW=489MiB/s (513MB/s)(19.0GiB/41840msec) fio.test3 fio.tpwo fio.test.writeback.rw.log: read: IOPS=112k, BW=438MiB/s (459MB/s)(19.0GiB/46745msec) fio.test1 fio.tpwp fio.test.writeback.rw.log: read: IOPS=141k, BW=552MiB/s (578MB/s)(19.0GiB/37122msec) fio.test2 fio.tpwp fio.test.writeback.rw.log: read: IOPS=130k, BW=508MiB/s (533MB/s)(19.0GiB/40315msec) fio.test3 fio.tpwp fio.test.writeback.rw.log: read: IOPS=137k, BW=533MiB/s (559MB/s)(19.0GiB/38390msec) fio.test1 fio.orig fio.test.writethrough.randrw.log: read: IOPS=80, BW=321KiB/s (329kB/s)(56.5MiB/180137msec) fio.test2 fio.orig fio.test.writethrough.randrw.log: read: IOPS=78, BW=314KiB/s (322kB/s)(55.3MiB/180143msec) fio.test3 fio.orig fio.test.writethrough.randrw.log: read: IOPS=78, BW=316KiB/s (323kB/s)(55.5MiB/180109msec) fio.test1 fio.test fio.test.writethrough.randrw.log: read: IOPS=81, BW=325KiB/s (333kB/s)(57.1MiB/180136msec) fio.test2 fio.test fio.test.writethrough.randrw.log: read: IOPS=80, BW=323KiB/s (331kB/s)(56.9MiB/180104msec) fio.test3 fio.test fio.test.writethrough.randrw.log: read: IOPS=78, BW=315KiB/s (323kB/s)(55.5MiB/180087msec) fio.test1 fio.tpwo fio.test.writethrough.randrw.log: read: IOPS=189, BW=758KiB/s (776kB/s)(133MiB/180095msec) fio.test2 fio.tpwo fio.test.writethrough.randrw.log: read: IOPS=190, BW=764KiB/s (782kB/s)(134MiB/180046msec) fio.test3 fio.tpwo fio.test.writethrough.randrw.log: read: IOPS=190, BW=762KiB/s (780kB/s)(134MiB/180062msec) fio.test1 fio.tpwp fio.test.writethrough.randrw.log: read: IOPS=209, BW=838KiB/s (858kB/s)(147MiB/180092msec) fio.test2 fio.tpwp fio.test.writethrough.randrw.log: read: IOPS=208, BW=834KiB/s (854kB/s)(147MiB/180091msec) fio.test3 fio.tpwp fio.test.writethrough.randrw.log: read: IOPS=210, BW=841KiB/s (861kB/s)(148MiB/180084msec) fio.test1 fio.orig fio.test.writethrough.rw.log: read: IOPS=82.7k, BW=323MiB/s (339MB/s)(56.8GiB/180061msec) fio.test2 fio.orig fio.test.writethrough.rw.log: read: IOPS=82.4k, BW=322MiB/s (337MB/s)(56.6GiB/180009msec) fio.test3 fio.orig fio.test.writethrough.rw.log: read: IOPS=82.5k, BW=322MiB/s (338MB/s)(56.7GiB/180031msec) fio.test1 fio.test fio.test.writethrough.rw.log: read: IOPS=80.7k, BW=315MiB/s (331MB/s)(55.4GiB/180034msec) fio.test2 fio.test fio.test.writethrough.rw.log: read: IOPS=82.5k, BW=322MiB/s (338MB/s)(56.7GiB/180051msec) fio.test3 fio.test fio.test.writethrough.rw.log: read: IOPS=82.7k, BW=323MiB/s (339MB/s)(56.8GiB/180058msec) fio.test1 fio.tpwo fio.test.writethrough.rw.log: read: IOPS=125k, BW=487MiB/s (510MB/s)(19.0GiB/42062msec) fio.test2 fio.tpwo fio.test.writethrough.rw.log: read: IOPS=136k, BW=530MiB/s (555MB/s)(19.0GiB/38652msec) fio.test3 fio.tpwo fio.test.writethrough.rw.log: read: IOPS=132k, BW=516MiB/s (541MB/s)(19.0GiB/39669msec) fio.test1 fio.tpwp fio.test.writethrough.rw.log: read: IOPS=134k, BW=525MiB/s (550MB/s)(19.0GiB/39029msec) fio.test2 fio.tpwp fio.test.writethrough.rw.log: read: IOPS=134k, BW=525MiB/s (551MB/s)(19.0GiB/38994msec) fio.test3 fio.tpwp fio.test.writethrough.rw.log: read: IOPS=121k, BW=472MiB/s (495MB/s)(19.0GiB/43392msec) fio.test1 fio.orig fio.test.none.randrw.log: write: IOPS=80, BW=324KiB/s (332kB/s)(56.0MiB/180092msec) fio.test2 fio.orig fio.test.none.randrw.log: write: IOPS=83, BW=333KiB/s (341kB/s)(58.6MiB/180137msec) fio.test3 fio.orig fio.test.none.randrw.log: write: IOPS=82, BW=329KiB/s (337kB/s)(57.0MiB/180142msec) fio.test1 fio.test fio.test.none.randrw.log: write: IOPS=82, BW=332KiB/s (340kB/s)(58.4MiB/180222msec) fio.test2 fio.test fio.test.none.randrw.log: write: IOPS=82, BW=329KiB/s (337kB/s)(57.9MiB/180177msec) fio.test3 fio.test fio.test.none.randrw.log: write: IOPS=79, BW=318KiB/s (325kB/s)(55.9MiB/180103msec) fio.test1 fio.tpwo fio.test.none.randrw.log: write: IOPS=192, BW=771KiB/s (789kB/s)(136MiB/180047msec) fio.test2 fio.tpwo fio.test.none.randrw.log: write: IOPS=195, BW=780KiB/s (799kB/s)(137MiB/180052msec) fio.test3 fio.tpwo fio.test.none.randrw.log: write: IOPS=193, BW=772KiB/s (791kB/s)(136MiB/180054msec) fio.test1 fio.tpwp fio.test.none.randrw.log: write: IOPS=214, BW=857KiB/s (878kB/s)(151MiB/180080msec) fio.test2 fio.tpwp fio.test.none.randrw.log: write: IOPS=213, BW=853KiB/s (874kB/s)(150MiB/180063msec) fio.test3 fio.tpwp fio.test.none.randrw.log: write: IOPS=212, BW=851KiB/s (871kB/s)(150MiB/180051msec) fio.test1 fio.orig fio.test.none.rw.log: write: IOPS=81.7k, BW=319MiB/s (335MB/s)(56.1GiB/180023msec) fio.test2 fio.orig fio.test.none.rw.log: write: IOPS=82.7k, BW=323MiB/s (339MB/s)(56.8GiB/180070msec) fio.test3 fio.orig fio.test.none.rw.log: write: IOPS=82.7k, BW=323MiB/s (339MB/s)(56.8GiB/180006msec) fio.test1 fio.test fio.test.none.rw.log: write: IOPS=83.1k, BW=325MiB/s (340MB/s)(57.1GiB/180035msec) fio.test2 fio.test fio.test.none.rw.log: write: IOPS=85.2k, BW=333MiB/s (349MB/s)(58.5GiB/180030msec) fio.test3 fio.test fio.test.none.rw.log: write: IOPS=82.8k, BW=323MiB/s (339MB/s)(56.9GiB/180003msec) fio.test1 fio.tpwo fio.test.none.rw.log: write: IOPS=119k, BW=464MiB/s (486MB/s)(20.0GiB/44178msec) fio.test2 fio.tpwo fio.test.none.rw.log: write: IOPS=120k, BW=468MiB/s (491MB/s)(20.0GiB/43727msec) fio.test3 fio.tpwo fio.test.none.rw.log: write: IOPS=123k, BW=481MiB/s (505MB/s)(20.0GiB/42553msec) fio.test1 fio.tpwp fio.test.none.rw.log: write: IOPS=128k, BW=501MiB/s (526MB/s)(20.0GiB/40860msec) fio.test2 fio.tpwp fio.test.none.rw.log: write: IOPS=135k, BW=526MiB/s (551MB/s)(20.0GiB/38971msec) fio.test3 fio.tpwp fio.test.none.rw.log: write: IOPS=144k, BW=564MiB/s (591MB/s)(20.0GiB/36352msec) fio.test1 fio.orig fio.test.writearound.randrw.log: write: IOPS=80, BW=321KiB/s (329kB/s)(56.5MiB/180123msec) fio.test2 fio.orig fio.test.writearound.randrw.log: write: IOPS=79, BW=319KiB/s (326kB/s)(56.1MiB/180114msec) fio.test3 fio.orig fio.test.writearound.randrw.log: write: IOPS=82, BW=331KiB/s (339kB/s)(58.2MiB/180108msec) fio.test1 fio.test fio.test.writearound.randrw.log: write: IOPS=82, BW=330KiB/s (338kB/s)(58.1MiB/180107msec) fio.test2 fio.test fio.test.writearound.randrw.log: write: IOPS=80, BW=321KiB/s (329kB/s)(56.5MiB/180069msec) fio.test3 fio.test fio.test.writearound.randrw.log: write: IOPS=79, BW=319KiB/s (327kB/s)(56.1MiB/180109msec) fio.test1 fio.tpwo fio.test.writearound.randrw.log: write: IOPS=191, BW=766KiB/s (784kB/s)(135MiB/180033msec) fio.test2 fio.tpwo fio.test.writearound.randrw.log: write: IOPS=192, BW=771KiB/s (790kB/s)(136MiB/180073msec) fio.test3 fio.tpwo fio.test.writearound.randrw.log: write: IOPS=193, BW=773KiB/s (792kB/s)(136MiB/180060msec) fio.test1 fio.tpwp fio.test.writearound.randrw.log: write: IOPS=212, BW=850KiB/s (870kB/s)(149MiB/180100msec) fio.test2 fio.tpwp fio.test.writearound.randrw.log: write: IOPS=214, BW=857KiB/s (878kB/s)(151MiB/180065msec) fio.test3 fio.tpwp fio.test.writearound.randrw.log: write: IOPS=213, BW=854KiB/s (875kB/s)(150MiB/180088msec) fio.test1 fio.orig fio.test.writearound.rw.log: write: IOPS=81.7k, BW=319MiB/s (335MB/s)(56.1GiB/180046msec) fio.test2 fio.orig fio.test.writearound.rw.log: write: IOPS=81.6k, BW=319MiB/s (334MB/s)(56.0GiB/180004msec) fio.test3 fio.orig fio.test.writearound.rw.log: write: IOPS=82.7k, BW=323MiB/s (339MB/s)(56.8GiB/180002msec) fio.test1 fio.test fio.test.writearound.rw.log: write: IOPS=82.7k, BW=323MiB/s (339MB/s)(56.8GiB/180097msec) fio.test2 fio.test fio.test.writearound.rw.log: write: IOPS=79.5k, BW=311MiB/s (326MB/s)(54.6GiB/180003msec) fio.test3 fio.test fio.test.writearound.rw.log: write: IOPS=81.7k, BW=319MiB/s (334MB/s)(56.1GiB/180056msec) fio.test1 fio.tpwo fio.test.writearound.rw.log: write: IOPS=153k, BW=596MiB/s (625MB/s)(20.0GiB/34356msec) fio.test2 fio.tpwo fio.test.writearound.rw.log: write: IOPS=119k, BW=466MiB/s (488MB/s)(20.0GiB/43978msec) fio.test3 fio.tpwo fio.test.writearound.rw.log: write: IOPS=130k, BW=507MiB/s (532MB/s)(20.0GiB/40388msec) fio.test1 fio.tpwp fio.test.writearound.rw.log: write: IOPS=131k, BW=512MiB/s (537MB/s)(20.0GiB/40037msec) fio.test2 fio.tpwp fio.test.writearound.rw.log: write: IOPS=257k, BW=1005MiB/s (1054MB/s)(20.0GiB/20386msec) fio.test3 fio.tpwp fio.test.writearound.rw.log: write: IOPS=136k, BW=530MiB/s (556MB/s)(20.0GiB/38618msec) fio.test1 fio.orig fio.test.writeback.randrw.log: write: IOPS=83, BW=332KiB/s (340kB/s)(58.5MiB/180146msec) fio.test2 fio.orig fio.test.writeback.randrw.log: write: IOPS=80, BW=324KiB/s (331kB/s)(56.9MiB/180075msec) fio.test3 fio.orig fio.test.writeback.randrw.log: write: IOPS=81, BW=327KiB/s (335kB/s)(57.5MiB/180103msec) fio.test1 fio.test fio.test.writeback.randrw.log: write: IOPS=82, BW=330KiB/s (338kB/s)(57.0MiB/180082msec) fio.test2 fio.test fio.test.writeback.randrw.log: write: IOPS=80, BW=323KiB/s (331kB/s)(56.8MiB/180106msec) fio.test3 fio.test fio.test.writeback.randrw.log: write: IOPS=80, BW=322KiB/s (330kB/s)(56.6MiB/180144msec) fio.test1 fio.tpwo fio.test.writeback.randrw.log: write: IOPS=182, BW=731KiB/s (749kB/s)(129MiB/180058msec) fio.test2 fio.tpwo fio.test.writeback.randrw.log: write: IOPS=192, BW=772KiB/s (790kB/s)(136MiB/180073msec) fio.test3 fio.tpwo fio.test.writeback.randrw.log: write: IOPS=193, BW=775KiB/s (793kB/s)(136MiB/180072msec) fio.test1 fio.tpwp fio.test.writeback.randrw.log: write: IOPS=211, BW=848KiB/s (868kB/s)(149MiB/180087msec) fio.test2 fio.tpwp fio.test.writeback.randrw.log: write: IOPS=210, BW=841KiB/s (861kB/s)(148MiB/180132msec) fio.test3 fio.tpwp fio.test.writeback.randrw.log: write: IOPS=213, BW=853KiB/s (874kB/s)(150MiB/180100msec) fio.test1 fio.orig fio.test.writeback.rw.log: write: IOPS=72.4k, BW=283MiB/s (296MB/s)(49.7GiB/180097msec) fio.test2 fio.orig fio.test.writeback.rw.log: write: IOPS=97.5k, BW=381MiB/s (399MB/s)(67.0GiB/180238msec) fio.test3 fio.orig fio.test.writeback.rw.log: write: IOPS=82.8k, BW=323MiB/s (339MB/s)(56.9GiB/180002msec) fio.test1 fio.test fio.test.writeback.rw.log: write: IOPS=81.5k, BW=318MiB/s (334MB/s)(55.9GiB/180002msec) fio.test2 fio.test fio.test.writeback.rw.log: write: IOPS=72.0k, BW=281MiB/s (295MB/s)(49.5GiB/180165msec) fio.test3 fio.test fio.test.writeback.rw.log: write: IOPS=81.7k, BW=319MiB/s (335MB/s)(56.1GiB/180037msec) fio.test1 fio.tpwo fio.test.writeback.rw.log: write: IOPS=116k, BW=451MiB/s (473MB/s)(20.0GiB/45400msec) fio.test2 fio.tpwo fio.test.writeback.rw.log: write: IOPS=125k, BW=490MiB/s (513MB/s)(20.0GiB/41840msec) fio.test3 fio.tpwo fio.test.writeback.rw.log: write: IOPS=112k, BW=438MiB/s (460MB/s)(20.0GiB/46745msec) fio.test1 fio.tpwp fio.test.writeback.rw.log: write: IOPS=141k, BW=552MiB/s (579MB/s)(20.0GiB/37122msec) fio.test2 fio.tpwp fio.test.writeback.rw.log: write: IOPS=130k, BW=508MiB/s (533MB/s)(20.0GiB/40315msec) fio.test3 fio.tpwp fio.test.writeback.rw.log: write: IOPS=137k, BW=534MiB/s (560MB/s)(20.0GiB/38390msec) fio.test1 fio.orig fio.test.writethrough.randrw.log: write: IOPS=81, BW=327KiB/s (335kB/s)(57.6MiB/180137msec) fio.test2 fio.orig fio.test.writethrough.randrw.log: write: IOPS=80, BW=320KiB/s (328kB/s)(56.4MiB/180143msec) fio.test3 fio.orig fio.test.writethrough.randrw.log: write: IOPS=80, BW=322KiB/s (330kB/s)(56.6MiB/180109msec) fio.test1 fio.test fio.test.writethrough.randrw.log: write: IOPS=82, BW=331KiB/s (339kB/s)(58.2MiB/180136msec) fio.test2 fio.test fio.test.writethrough.randrw.log: write: IOPS=82, BW=330KiB/s (338kB/s)(57.0MiB/180104msec) fio.test3 fio.test fio.test.writethrough.randrw.log: write: IOPS=80, BW=321KiB/s (329kB/s)(56.5MiB/180087msec) fio.test1 fio.tpwo fio.test.writethrough.randrw.log: write: IOPS=192, BW=770KiB/s (788kB/s)(135MiB/180095msec) fio.test2 fio.tpwo fio.test.writethrough.randrw.log: write: IOPS=193, BW=774KiB/s (793kB/s)(136MiB/180046msec) fio.test3 fio.tpwo fio.test.writethrough.randrw.log: write: IOPS=193, BW=774KiB/s (793kB/s)(136MiB/180062msec) fio.test1 fio.tpwp fio.test.writethrough.randrw.log: write: IOPS=211, BW=847KiB/s (867kB/s)(149MiB/180092msec) fio.test2 fio.tpwp fio.test.writethrough.randrw.log: write: IOPS=211, BW=846KiB/s (866kB/s)(149MiB/180091msec) fio.test3 fio.tpwp fio.test.writethrough.randrw.log: write: IOPS=212, BW=850KiB/s (871kB/s)(150MiB/180084msec) fio.test1 fio.orig fio.test.writethrough.rw.log: write: IOPS=82.6k, BW=323MiB/s (338MB/s)(56.8GiB/180061msec) fio.test2 fio.orig fio.test.writethrough.rw.log: write: IOPS=82.3k, BW=322MiB/s (337MB/s)(56.5GiB/180009msec) fio.test3 fio.orig fio.test.writethrough.rw.log: write: IOPS=82.5k, BW=322MiB/s (338MB/s)(56.6GiB/180031msec) fio.test1 fio.test fio.test.writethrough.rw.log: write: IOPS=80.6k, BW=315MiB/s (330MB/s)(55.4GiB/180034msec) fio.test2 fio.test fio.test.writethrough.rw.log: write: IOPS=82.5k, BW=322MiB/s (338MB/s)(56.7GiB/180051msec) fio.test3 fio.test fio.test.writethrough.rw.log: write: IOPS=82.6k, BW=323MiB/s (338MB/s)(56.7GiB/180058msec) fio.test1 fio.tpwo fio.test.writethrough.rw.log: write: IOPS=125k, BW=487MiB/s (511MB/s)(20.0GiB/42062msec) fio.test2 fio.tpwo fio.test.writethrough.rw.log: write: IOPS=136k, BW=530MiB/s (556MB/s)(20.0GiB/38652msec) fio.test3 fio.tpwo fio.test.writethrough.rw.log: write: IOPS=132k, BW=516MiB/s (541MB/s)(20.0GiB/39669msec) fio.test1 fio.tpwp fio.test.writethrough.rw.log: write: IOPS=134k, BW=525MiB/s (550MB/s)(20.0GiB/39029msec) fio.test2 fio.tpwp fio.test.writethrough.rw.log: write: IOPS=134k, BW=525MiB/s (551MB/s)(20.0GiB/38994msec) fio.test3 fio.tpwp fio.test.writethrough.rw.log: write: IOPS=121k, BW=472MiB/s (495MB/s)(20.0GiB/43392msec) -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1829563 Title: bcache: risk of data loss on I/O errors in backing or caching devices Status in linux package in Ubuntu: Fix Committed Status in linux source package in Bionic: Fix Committed Status in linux source package in Cosmic: Won't Fix Status in linux source package in Disco: Fix Committed Status in linux source package in Eoan: Fix Committed Bug description: [Impact] * The bcache code in Bionic lacks several fixes to handle I/O errors in both backing devices and caching devices. * Partial or permanent errors in backing or caching devices, specially in writeback mode, can lead to data loss and/or the application is not notified about failed I/O requests. * The bcache device might remain available for I/O requests even if backing device is offline, so writes are undefined. [Test Case] * Detailed test cases/steps for the behavior of many patches with code logic changes are provided in bug comments. * The patchset has been tested for regressions on each cache mode (writethrough, writeback, writearound, none) with the xfstests test suite (on ext4) and fio (sequential + random read-write). [Regression Potential] * The patchset is relatively large and touches several areas in bcache code, however, synthetic testing of the patches has been performed, and extensive regression/stress tests were run (as mentioned in Test Case section). * Many patches in the patchset are 'Fixes' patches to other patches, and no further 'Fixes' currently exist upstream. [Other Info] * Canonical Field Eng. deploys bcache+writeback extensively (e.g., BootStack, UA cloud, except rare all-flash cases). [Original Bug Description] This is a request for a backport of the following upstream patch from 4.18: "bcache: stop bcache device when backing device is offline" https://github.com/torvalds/linux/commit/0f0709e6bfc3ce4e8e1c0e8573490c45f76cfeee Field engineering uses bcache quite extensively and it would be good to have this in the GA/bionic kernel. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1829563/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
