Avi Kivity c020b4e5e2 logalloc: increase capacity of _regions vector outside reclaim lock ...

Reclaim consults the _regions vector, so we don't want it moving around while
allocating more capacity. For that we take the reclaim lock. However, that
can cause a false-positive OOM during startup:

1. all memory is allocated to LSA as part of priming (2baa16b371)
2. the _regions vector is resized from 64k to 128k, requiring a segment
   to be freed (plenty are free)
3. but reclaiming_lock is taken, so we cannot reclaim anything.

To fix, resize the _regions vector outside the lock.

Fixes #6003.
Message-Id: <20200311091217.1112081-1-avi@scylladb.com>

2020-03-11 12:29:31 +02:00

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