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Don't allocate from new metaslabs

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Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Paul Dagnelie <pcd@delphix.com>
Closes #15307
Closes #15308
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Paul Dagnelie 2023-09-28 14:08:52 -07:00 committed by GitHub
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9
module/zfs/metaslab.c
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@ -3250,6 +3250,15 @@ metaslab_segment_weight(metaslab_t *msp)
static boolean_t
metaslab_should_allocate(metaslab_t *msp, uint64_t asize, boolean_t try_hard)
{
/*
* This case will usually but not always get caught by the checks below;
* metaslabs can be loaded by various means, including the trim and
* initialize code. Once that happens, without this check they are
* allocatable even before they finish their first txg sync.
*/
if (unlikely(msp->ms_new))
return (B_FALSE);
/*
* If the metaslab is loaded, ms_max_size is definitive and we can use
* the fast check. If it's not, the ms_max_size is a lower bound (once