Corruption caused by umount not flushing the buffer cache.

[Alan Cox]

> I know I can get around this by forcing a BLKFLSBUF ioctl to the device after 
> the unmount but this strikes me as a bug in the linux umount semantics which 
> will bite more people than just me as linux enters the SAN arena.

Solve policy problems in user space. If you want a umount to do that put
it in the _application_. I don't want my caches flushing all the time just
because I remount stuff


Alan


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