Details
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Bug
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Resolution: Fixed
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Minor
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None
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Lustre 2.14.0
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None
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3
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9223372036854775807
Description
We see serious extent status shrink problem on some customer sites,
the backtrace could be:
NMI watchdog: BUG: soft lockup - CPU#6 stuck for 22s! [kswapd0:106]
[<ffffffffae1958c2>] merge+0x62/0xc0
[<ffffffffc123fc50>] ? ldiskfs_init_inode_table+0x410/0x410 [ldiskfs]
[<ffffffffae1959bb>] list_sort+0x9b/0x250
[<ffffffffc124014e>] __ldiskfs_es_shrink+0x1ce/0x2a0 [ldiskfs]
[<ffffffffc12402d4>] ldiskfs_es_shrink+0xb4/0x130 [ldiskfs]
[<ffffffffadfcf805>] shrink_slab+0x175/0x340
[<ffffffffae03e1d7>] ? vmpressure+0x87/0x90
[<ffffffffadfd3538>] balance_pgdat+0x3a8/0x5e0
There are some patches in the linux upstream which could significantly improve this case