https://bugzilla.kernel.org/show_bug.cgi?id=50981 Zheng Liu <gnehzuil.liu@xxxxxxxxx> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |gnehzuil.liu@xxxxxxxxx --- Comment #3 from Zheng Liu <gnehzuil.liu@xxxxxxxxx> 2012-11-26 10:16:19 --- IMHO, the reason seems to be that no any locking is taken by generic_file_aio_read(). When ext4 does a buffered write, it will take i_mutex to ensure that there is no other writer. But ext4 (ext3, btrfs, and vfat) uses generic_file_aio_read() to do a buffered read, and it doesn't take i_mutex. So it is easy to read a inconsistent data while doing a write. I am not very familiar with xfs, but a rwlock will be taken when a read and/or a write is being done. So that is why xfs hasn't this problem. -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are watching the assignee of the bug. -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
