Re: [PATCH] Use of getblk differs between locations

From: Jamie Lokier
Date: Wed Oct 12 2005 - 19:09:54 EST

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

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
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at