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os/bluestore/BlueFS: do not start racing async compaction

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Compaction is triggred from sync_metadata.  If one compaction is
in progress and another thread also calls sync_metadata, do not
trigger a second async compaction!

Signed-off-by: Sage Weil <sage@redhat.com>
This commit is contained in:
Sage Weil 2016-09-07 15:29:30 -04:00
parent f8abb628a4
commit dbe23c94c0
1 changed files with 7 additions and 3 deletions
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10
src/os/bluestore/BlueFS.cc
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@ -998,10 +998,14 @@ bool BlueFS::_should_compact_log()
float ratio = (float)current / (float)expected;
dout(10) << __func__ << " current 0x" << std::hex << current
<< " expected " << expected << std::dec
<< " ratio " << ratio << dendl;
if (current < g_conf->bluefs_log_compact_min_size ||
ratio < g_conf->bluefs_log_compact_min_ratio)
<< " ratio " << ratio
<< (log_flushing ? " (async compaction in progress)" : "")
<< dendl;
if (log_flushing ||
current < g_conf->bluefs_log_compact_min_size ||
ratio < g_conf->bluefs_log_compact_min_ratio) {
return false;
}
return true;
}