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Evicting too many bytes from MFU metadata

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Without updating 'm' we evict from MFU metadata all that we wanted
to evict from all metadata, including already evicted MRU metadata
('m' is the total amount of metadata we had at the beginning,
and 'w' is the total amount of metadata we want to have). 

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Signed-off-by: Theera K. <tkittich@hotmail.com>
Closes #16521
Closes #16546
This commit is contained in:
Theera K. 2024-09-24 12:12:56 +07:00 committed by Tony Hutter
parent 54278533a4
commit 0987892160
1 changed files with 1 additions and 1 deletions
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module/zfs/arc.c
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@ -4311,7 +4311,7 @@ arc_evict(void)
/* Evict MFU metadata. */ /* Evict MFU metadata. */
w = wt * (int64_t)(arc_meta >> 16) >> 16; w = wt * (int64_t)(arc_meta >> 16) >> 16;
e = MIN((int64_t)(asize - arc_c), (int64_t)(m - w)); e = MIN((int64_t)(asize - arc_c), (int64_t)(m - bytes - w));
bytes = arc_evict_impl(arc_mfu, ARC_BUFC_METADATA, e); bytes = arc_evict_impl(arc_mfu, ARC_BUFC_METADATA, e);
total_evicted += bytes; total_evicted += bytes;
mfum -= bytes; mfum -= bytes;