1. In a data processing system that includes an operating system, one or more program components running on the operating system, and a file system associated with one or more files, a computer program product executable in a computer recordable storage medium comprising: instructions responsive to a given write request sent from a specified program component to the operating system, in order to write specified data content to a given file, for determining whether the given write request meets a criterion derived from the identity of at least one of the specified program component and the given file; instructions responsive to determining that the given write request meets said criterion, for immediately sending a message to release the specified program component from a wait state and applying one or more policies to the specified data content, in order to determine whether any portion of the specified data content needs to be written to the given file, and if so, selecting each such data portion to be written to the given file; instructions for selectively writing data portions of the specified data content to a storage buffer based on the one or more policies; and instructions for subsequently writing each data portion of the data portions in the storage buffer to the given file.