On Wed, Feb 10, 2021 at 06:56:06PM +0000, Matthew Wilcox wrote:

On Wed, Feb 10, 2021 at 08:29:01AM -0800, Ira Weiny wrote:

quoted

And I thought it was a good idea.  Any file system development should have
tests with DEBUG_VM which should cover Matthew's concern while not having the
overhead in production.  Seemed like a decent compromise?

Why do you think these paths are only used during file system development?

I can't guarantee it but right now most of the conversions I have worked on are
in FS's.

They're definitely used by networking, by device drivers of all kinds
and they're probably even used by the graphics system.

While developers *should* turn on DEBUG_VM during development, a
shockingly high percentage don't even turn on lockdep.

Honestly, I don't feel strongly enough to argue it.

Andrew?  David?  David this is going through your tree so would you feel more
comfortable with 1 or the other?

Ira