On Fri, Aug 29, 2014 at 3:51 PM, Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote: > On Fri, Aug 29, 2014 at 01:37:48PM +0100, Filipe Manana wrote: >> After the commit 7fc34a62ca4434a79c68e23e70ed26111b7a4cf8 (titled >> "mm/msync.c: sync only the requested range in msync()"), our fsync >> callback can be called with a range that covers only part of the >> file and not the whole file anymore. > > Not that there have been other users of range fsyncs around for a long > time. The SCSI target code is one, the NFS server another, and last but > not least generic_write_sync() which is used by most filesystems > including btrfs to implement O_SYNC writes. Point taken Christoph, this isn't specific to msync nor impossible to happen before 7fc34a62ca4434a79c68e23e70ed26111b7a4cf8. I'll update the commit log to reflect that. Thanks for looking. > -- > To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- Filipe David Manana, "Reasonable men adapt themselves to the world. Unreasonable men adapt the world to themselves. That's why all progress depends on unreasonable men." -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
