> I'm hitting a case where mdcache keeps growing well beyond the high water
> mark. Here is a snapshot of the lru_state:
>
> 1 = {entries_hiwat = 100000, entries_used = 2306063, chunks_hiwat =
100000,
> chunks_used = 16462,
>
> It has grown to 2.3 million entries and each entry is ~1.6K.
>
> I looked at the first entry in lane 0, L1 queue:
>
> (gdb) p LRU[0].L1
> $9 = {q = {next = 0x7fad64256f00, prev = 0x7faf21a1bc00}, id =
> LRU_ENTRY_L1, size = 254628}
> (gdb) p (mdcache_entry_t *)(0x7fad64256f00-1024)
> $10 = (mdcache_entry_t *) 0x7fad64256b00
> (gdb) p $10->lru
> $11 = {q = {next = 0x7fad65ea0f00, prev = 0x7d67c0 <LRU>}, qid =
> LRU_ENTRY_L1, refcnt = 2, flags = 0, lane = 0, cf = 0}
> (gdb) p $10->fh_hk.inavl
> $13 = true
The refcount 2 prevents reaping.
There could be a refcount leak.
Hmm, though, I thought the entries_hwmark was a hard limit, guess not...
Frank
> Lane 1:
> (gdb) p LRU[1].L1
> $18 = {q = {next = 0x7fad625c0300, prev = 0x7faec08c5100}, id =
> LRU_ENTRY_L1, size = 253006}
> (gdb) p (mdcache_entry_t *)(0x7fad625c0300 - 1024)
> $21 = (mdcache_entry_t *) 0x7fad625bff00
> (gdb) p $21->lru
> $22 = {q = {next = 0x7fad66fce600, prev = 0x7d68a0 <LRU+224>}, qid =
> LRU_ENTRY_L1, refcnt = 2, flags = 0, lane = 1, cf = 1}
>
> (gdb) p $21->fh_hk.inavl
> $24 = true
>
> As per LRU_ENTRY_RECLAIMABLE(), these entry should be reclaimable. Not
> sure why it is not able to claim it. Any ideas?
>
> Thanks,
> Pradeep
>
>
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