Re: [PATCH] Use of getblk differs between locations

[Jamie Lokier <jamie@shareable.org>]

Mikulas Patocka wrote:
> But discarding data sometimes on USB unplug is even worse than discarding 
> data always --- users will by experimenting learn that linux doesn't 
> discard write-cached data and reminds them to replug the device --- and 
> one day, randomly, they lose their data because of some memory management 
> condition...

It should not happen provided the total amount of dirty data for
detachable devices is restricted to allow enough room for opening a
dialog.

That's no different, in principle, than the restrictions that are used
to ensure some types of kernel memory allocation always succeed.

There's no exact calculation, just a notion of "this many megabytes
should be enough for a dialog".

-- Jamie
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