IndexedDB: fsync after transactions.

content/browser/indexed_db/leveldb/leveldb_database.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/indexed_db/leveldb/leveldb_database.h"
 
 #include <cerrno>
 
 #include "base/basictypes.h"
 #include "base/logging.h"
@@ skipping 16 matching lines @@
 #include "third_party/leveldatabase/src/include/leveldb/slice.h"
 
 using base::StringPiece;
 
 namespace content {
 
 // Forcing flushes to disk at the end of a transaction guarantees that the
 // data hit disk, but drastically impacts throughput when the filesystem is
 // busy with background compactions. Not syncing trades off reliability for
 // performance. Note that background compactions which move data from the
-// log to SSTs are still done with reliable writes.
+// log to SSTs are always done with reliable writes.
 //
 // Sync writes are necessary on Windows for quota calculations; POSIX
 // calculates file sizes correctly even when not synced to disk.
 #if defined(OS_WIN)
 static const bool kSyncWrites = true;
 #else
-static const bool kSyncWrites = false;
+// Set _back_ to true in attempt to fix corruption increase on CrOS devices.

[jsbell, 2014/01/27 21:18:22]

Can you make this a TODO to either remove the #if block or reinstate the
difference?

[dgrogan, 2014/01/27 21:22:05]

Done.

+// See http://crbug.com/338385.
+static const bool kSyncWrites = true;
 #endif
 
 static leveldb::Slice MakeSlice(const StringPiece& s) {
   return leveldb::Slice(s.begin(), s.size());
 }
 
 static StringPiece MakeStringPiece(const leveldb::Slice& s) {
   return StringPiece(s.data(), s.size());
 }
 
@@ skipping 402 matching lines @@
 }
 
 void LevelDBDatabase::Compact(const base::StringPiece& start,
                               const base::StringPiece& stop) {
   const leveldb::Slice start_slice = MakeSlice(start);
   const leveldb::Slice stop_slice = MakeSlice(stop);
   db_->CompactRange(&start_slice, &stop_slice);
 }
 
 }  // namespace content