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proxmox-rrd: use fine grained locking in commit_journal_impl

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Aquire the rrd_map lock for each file (else we block access for a long time)
This commit is contained in:
Dietmar Maurer
2021-10-18 14:52:27 +02:00
parent c17fbbbc07
commit 7f381a6246
2 changed files with 31 additions and 18 deletions
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18
proxmox-rrd/src/cache.rs
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@ -152,6 +152,7 @@ impl RRDCache {
let state = Arc::clone(&self.state);
let rrd_map = Arc::clone(&self.rrd_map);
let mut state_guard = self.state.write().unwrap();
let journal_applied = state_guard.journal_applied;
@ -372,8 +373,23 @@ fn commit_journal_impl(
rrd_map: Arc<RwLock<RRDMap>>,
) -> Result<usize, Error> {
let files = rrd_map.read().unwrap().file_list();
let mut rrd_file_count = 0;
let mut errors = 0;
// save all RRDs - we only need a read lock here
let rrd_file_count = rrd_map.read().unwrap().flush_rrd_files()?;
for rel_path in files.iter() {
rrd_file_count += 1;
if let Err(err) = rrd_map.read().unwrap().flush_rrd_file(&rel_path) {
errors += 1;
log::error!("unable to save rrd {}: {}", rel_path, err);
}
}
if errors != 0 {
bail!("errors during rrd flush - unable to commit rrd journal");
}
// if everything went ok, remove the old journal files
state.write().unwrap().remove_old_journals()?;