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SubjectRe: [PATCH 2/4] block: support compat discard mode by default.
On Thu, Feb 11, 2010 at 01:57:50PM +0300, Dmitry Monakhov wrote:
> Currently there are many filesystems which has implemented
> discard support, but ssd discs not widely used yet.
> Let's allow user to use compat discard mode by default.
> After this feature is enabled by default for all devices which has
> no native discard support it will be possible to use this feature
> simply by passing appropriate mount option to fs (-odiscard in ext4)

So why do you even bother adding the DISCARD_FL_COMPAT option?
This is a debug option that should probably be controlled at the
block level, not anywhere near the filesystem.

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