Messages in this thread | | | Date | Wed, 17 Mar 2010 11:22:52 +0100 | From | Jens Axboe <> | Subject | Re: Block device files and the page cache |
| |
On Tue, Mar 16 2010, Alan Stern wrote: > Jens and Al: > > Simple testing seems to show that when a program closes a file > descriptor for a block device file, the release method in the device > driver's block_device_operations structure doesn't get called (and the > close(2) system call doesn't return) until all the dirty pages for that > device have been written out. > > Can anyone confirm that this always happens? Where in the kernel > source is this handled?
Alan, see fs/block_dev.c:__blkdev_put(). The last put of the device will sync the device before calling fops->release().
-- Jens Axboe
| |