id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	field_blocks	field_dependson	field_seealso
251	FAT driver somehow limits multiple access to a file	Martin Decky		"As the klog task stores the kernel log output to a file /log/klog, a strange behaviour can be observed if the /log/klog is stored on a FAT filesystem.

Although the klog uses both fflush() and fsync() to flush all possible buffers, the size of the /log/klog file never actually grows beyond 3072 bytes and it is not possible to read more data from it than 3072 bytes via other tasks (such as ""cat"" command or edit).

It is questionable whether this is really a bug or somehow an expected behaviour given the fact FAT was probably not designed for parallel access from multiple tasks, but there should be probably some way except using fclose()/close() to force consistent view of the file.

The root cause of this issue is probably not in libc and VFS, since replacing FAT with tmpfs solves it."	defect	closed	major	0.4.3	helenos/fs/fat	mainline	fixed		jakub@…