Re: [PATCH 2/2] nvme: drop WARN_ON_ONCE on write_stream bounds check

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

On Thu, Jul 30, 2026 at 01:41:23PM +0200, Christoph Hellwig wrote:
> On Tue, Jul 28, 2026 at 08:58:00AM +0200, Greg Kroah-Hartman wrote:
> [... monster quote mostly dropped, please stick mail netiquette]
> > > but a debug setup you get what you pay for, and I'm really tired of
> > > all these totally stupid attempts to make WARN_ON the new BUG_ON.
> > > It is not, and that's for a reason.
> > 
> > I'm tired of it too, but again, if this can be hit by something a user
> > does, it ends up being a DoS on the machine :(
> 
> So let's kill parnic_on_warn?  Or tain the kernel when it is set so
> that anyone enaling it knows they have to keep the pieces when it
> breaks?

I know why the cloud-boxes want panic-on-warn enabled, as they are
cattle and want any potential problem to just reboot the box and keep on
going.  And Samsung likes it for their billions of devices for the same
reason (it's "safe" to reboot a phone I guess...)

So as much as I would _love_ to drop it, we seem to have real users.

sorry,

greg k-h