Re: [PATCH v2 0/7] rust_binder : Implement dynamic debug logging mask

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

On Sat, Jul 11, 2026 at 12:42:11PM +0200, Alice Ryhl wrote:
> On Sat, Jul 11, 2026 at 12:29 PM Jahnavi Nitheesha Mandava
> <jahnavimn@google.com> wrote:
> >
> > On Fri, Jul 10, 2026 at 8:31 PM Greg Kroah-Hartman
> > <gregkh@linuxfoundation.org> wrote:
> > >
> > > On Fri, Jul 10, 2026 at 02:32:51PM +0000, Jahnavi MN via B4 Relay wrote:
> > > > When a user-space application sends malformed data or makes a
> > > > lifecycle mistake, the driver rejects it with a generic error code
> > > > (like -EINVAL). Without internal logs, the driver acts as a
> > > > "black box," forcing developers to guess which check failed.
> > > >
> > > > In the legacy C Binder driver, this issue is solved using a dynamic
> > > > debug_mask module parameter that toggles verbose logs for specific
> > > > subsystems. This series brings the same critical capability to the
> > > > Rust Binder driver to provide developers with clear, real-time
> > > > feedback.
> > > >
> > > > Instead of rebuilds, reboots, or guessing:
> > > > - Developers can enable logs instantly on a running device by writing to
> > > >   `/sys/module/rust_binder/parameters/debug_mask`.
> > > > - It prints the exact reason for failures (such as alignment errors,
> > > >   mismatched call stacks, or invalid handle references) directly into
> > > >   `dmesg`, reducing debugging time from hours to seconds.
> > > > - It protects system logs by keeping logging off by default and only
> > > >   enabling it when developers are actively troubleshooting.
> > > >
> > > > Based on top of:
> > > > https://lore.kernel.org/rust-for-linux/20260707-upgrade-poll-v6-0-4b8fae7bf1d9@google.com/
> > > >
> > > > Signed-off-by: Jahnavi MN <jahnavimn@google.com>
> > >
> > > Patches 5 and 7 did not apply to my tree, can you rebase against the
> > > char-misc-testing branch and send just those?  Other ones are now all
> > > queued up, nice work!
> > >
> > > thanks,
> > >
> > > greg k-h
> >
> > Hi Greg,
> >
> > Thanks! I will rebase and resubmit only patches 5 and 7 as a new
> > version (v3) of this series shortly.
> >
> > Regarding the feedback I received on Patch 1 (using the BIT macro
> > and Atomic<u32>), since Patch 1 is already queued, I will send those
> > cleanups as a separate, follow-up patch. Does that sound good?
> 
> Since it's only queued in char-misc-testing and not char-misc-next, I
> don't think it's too late to change the patches themselves. So I guess
> you could also resend the entire series based on top of commit
> f8d269390cd2 ("rust_binder: update Process::node_refs to use
> SpinLock") from testing?

Yes, I messed up the application of this series to my tree as Alice
pointed out in another email.  If you could just rebase and resend a new
version, that would be great.

thanks,

greg k-h