On Fri, Mar 23, 2012 at 1:26 PM, Kasatkin, Dmitry <dmitry.kasatkin@xxxxxxxxx> wrote: > On Fri, Mar 23, 2012 at 1:10 PM, Zdenek Kabelac <zkabelac@xxxxxxxxxx> wrote: >> Dne 23.3.2012 12:01, Kasatkin, Dmitry napsal(a): >>> Hello, >>> >>> When using dm-bufio and dm-io in general, how to ensure that all dirty >>> buffers are written to the storage when machine reboots? >>> suspend hooks could be used, but they are not called on reboot, only >>> when suspending/removing the target... >>> >> >> You mean you reboot without running 'sync' command? >> >> And yes - on reboot you should properly unmount devices - so you should >> see removal of target on your shutdown sequence - I believe Fedora currently >> tries to support switch to some shutdown ramdisk, so all filesystem and >> devices might be properly unmounted and destroyed. >> > > Hello, > > Thanks for response. > I use bufio to store some data on block device. > It is not mounted in anyway. My target just use it to load/store data. > When machine reboots, I want to be sure that bufio written all dirty buffers... > > - Dmitry > At the moment, I have reboot notifier which does the following dm_bufio_write_dirty_buffers(d->bufio); sync_blockdev(d->dev->bdev); blkdev_issue_flush(d->dev->bdev, GFP_KERNEL, NULL); without first line on the next boot I got corrupted/not updated blocks. and I am not sure if I need last 2 lines... - Dmitry > >> Zdenek >> >> -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
