Re: 2.3.40 loop-device-behaviour

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On Wed, Jan 26, 2000 at 12:27:38PM -0800, Pete Zaitcev wrote:

> Consider the following script:
>
> genromfs -a 512 -f flash.root.image -d proto
> mount -t romfs -o ro,loop=/dev/loop0 flash.root.image /mnt
> silo -C /mnt/etc/silo.conf -J flash.total -i /mnt/boot/ieee32 \
> -b /mnt/boot/second.b
> umount /mnt
>
> It works only once. On the second time silo gets stale data.
> My workaround is to add "cat /wad/mp3/*.mp3 > /dev/null"
> right before the mount.
>
> I talked to Alan and he says that somebody needs to do
> ioctl(fd, BLKFLSBUF), presumably losetup. I have not tested
> his suggestion yet.

Yes. These days you can do that from the command line:

        blockdev --flushbufs device

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