[LU-11518] lock_count is exceeding lru_size

• Type: Bug
• Resolution: Fixed
• Priority: Major
• Fix Version/s: Lustre 2.14.0
• Labels: LTS12 ORNL
• Environment: Client: ; 2.11.53_197_g0f2d3f5 ; Server: ; 2.11.53_197_g0f2d3f5
• Severity: 3
• Assignee: Gu Zheng (Inactive)
• Reporter: Gu Zheng (Inactive)

Description

Mitsuhiro reported lock_count is exceeding lru_size ( disabled lru resize) on DDN es3.x branch before, and when we tested with master, found the same problem can also be seen on upstream.

 
 

# for i in `seq -w 10001 20000`; do dd if=/dev/zero of=/mnt/lustre/1KB_file-${i} bs=1K count=1 > /dev/null 2>&1 ; echo ${i} ; done

# lctl get_param ldlm.namespaces.*.lru_size
ldlm.namespaces.lustre-MDT0000-mdc-ffff8d0afcc55000.lru_size=800
ldlm.namespaces.lustre-OST0000-osc-ffff8d0afcc55000.lru_size=800
ldlm.namespaces.lustre-OST0001-osc-ffff8d0afcc55000.lru_size=800

# lctl get_param ldlm.namespaces.*.lock_count
ldlm.namespaces.lustre-MDT0000-mdc-ffff8d0afcc55000.lock_count=800
ldlm.namespaces.lustre-OST0000-osc-ffff8d0afcc55000.lock_count=4090 ldlm.namespaces.lustre-OST0001-osc-ffff8d0afcc55000.lock_count=4096
 

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Issue Links

• is related to: LU-14221 Client hangs when using DoM with a fixed mdc lru_size
• is related to: LU-4300 ptlrpcd threads deadlocked in cl_lock_mutex_get
• is related to: LU-6390 lru_size on the OSC is not honored
• is related to: LU-12095 ocd_connect_flags are wrong during reconnect
• is related to: LU-7236 OST connect and disconnect on demand