Adding Commentts

Signed-off-by: Alan Protasio <approtas@amazon.com>

CHANGELOG.md

@@ -18,7 +18,8 @@ We use *breaking :warning:* to mark changes that are not backward compatible (re
 - [#5440](https://github.com/thanos-io/thanos/pull/5440) HTTP metrics: export number of in-flight HTTP requests.
 - [#5424](https://github.com/thanos-io/thanos/pull/5424) Receive: Export metrics regarding size of remote write requests.
 - [#5420](https://github.com/thanos-io/thanos/pull/5420) Receive: Automatically remove stale tenants.
-- [#5475](https://github.com/thanos-io/thanos/pull/5475) Compact/Store: Added `--block-files-concurrency` allowing to configure number of go routines for upload/download block files during compaction.
+- [#5472](https://github.com/thanos-io/thanos/pull/5472) Receive: add new tenant metrics to example dashboard.
+- [#5475](https://github.com/thanos-io/thanos/pull/5475) Compact/Store: Added `--block-files-concurrency` allowing to configure number of go routines for download/upload block files during compaction.
 
 ### Changed
 

pkg/objstore/objstore.go

@@ -235,6 +235,9 @@ func NopCloserWithSize(r io.Reader) io.ReadCloser {
 func UploadDir(ctx context.Context, logger log.Logger, bkt Bucket, srcdir, dstdir string, options ...UploadOption) error {
 	df, err := os.Stat(srcdir)
 	opts := applyUploadOptions(options...)
+
+	// The derived Context is canceled the first time a function passed to Go returns a non-nil error or the first
+	// time Wait returns, whichever occurs first.
 	g, ctx := errgroup.WithContext(ctx)
 	g.SetLimit(opts.concurrency)
 
@@ -334,6 +337,8 @@ func DownloadDir(ctx context.Context, logger log.Logger, bkt BucketReader, origi
 	}
 	opts := applyDownloadOptions(options...)
 
+	// The derived Context is canceled the first time a function passed to Go returns a non-nil error or the first
+	// time Wait returns, whichever occurs first.
 	g, ctx := errgroup.WithContext(ctx)
 	g.SetLimit(opts.concurrency)