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lib/db: Clean up Timer and wait for logging before return in GC (#7720)

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greatroar 2021-05-31 09:50:21 +02:00 committed by GitHub
parent fcb19518c7
commit 95c9561e97
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 12 additions and 13 deletions
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25
lib/db/lowlevel.go
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@ -693,20 +693,19 @@ func (db *Lowlevel) gcIndirect(ctx context.Context) (err error) {
var discardedBlocks, matchedBlocks, discardedVersions, matchedVersions int
internalCtx, cancel := context.WithCancel(ctx)
defer cancel()
go func() {
// Only print something if the process takes more than "a moment".
select {
case <-internalCtx.Done():
case <-time.After(10 * time.Second):
l.Infoln("Database GC started - many Syncthing operations will be unresponsive until it's finished")
<-internalCtx.Done()
if err != nil || ctx.Err() != nil {
return
}
l.Infof("Database GC done (discarded/remaining: %v/%v blocks, %v/%v versions)", discardedBlocks, matchedBlocks, discardedVersions, matchedVersions)
// Only print something if the process takes more than "a moment".
logWait := make(chan struct{})
logTimer := time.AfterFunc(10*time.Second, func() {
l.Infoln("Database GC started - many Syncthing operations will be unresponsive until it's finished")
close(logWait)
})
defer func() {
if logTimer.Stop() || err != nil {
return
}
<-logWait // Make sure messages are sent in order.
l.Infof("Database GC done (discarded/remaining: %v/%v blocks, %v/%v versions)",
discardedBlocks, matchedBlocks, discardedVersions, matchedVersions)
}()
t, err := db.newReadWriteTransaction()