[origin/cache_detach] CAS hang during cache flush operation

[Kamoppl]

Description

Flushing cache ends with CAS hang

Expected Behavior

Flush ends

Actual Behavior

CAS hang during flush operation

Steps to Reproduce

1. Start cache and add 2 cores
2. Fill cores with dirty data
3. Flush first core

Context

-

Possible Fix

Logs

[<0>] _cache_mngt_core_flush_sync.constprop.0+0xa1/0x150 [cas_cache] [<0>] cache_mngt_flush_object+0x8a/0xc0 [cas_cache] [<0>] cas_service_ioctl_ctrl+0x2354/0x3690 [cas_cache] [<0>] __x64_sys_ioctl+0x92/0xd0 [<0>] do_syscall_64+0x59/0xc0 [<0>] entry_SYSCALL_64_after_hwframe+0x61/0xcb

Your Environment

• OpenCAS version (origin/cache_detach):
• Operating System: Ubuntu 22.04
• Kernel version: 5.15.0-72-generic
• Cache device type (NAND/Optane/other):
• Core device type (HDD/SSD/other):
• Cache configuration:
• • Cache mode: (default: wt) WO
• • Cache line size: (default: 4) 4k
• • Promotion policy: (default: always)
• • Cleaning policy: (default: alru) nop
• • Sequential cutoff policy: (default: full) never
• Other (e.g. lsblk, casadm -P, casadm -L)

[Kamoppl]

Fixed