RE: [PATCH v5 0/4] make '%pD' print the full path of file

[Justin He <Justin.He@arm.com>]

Hi Andy

> -----Original Message-----
> From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
> Sent: Tuesday, June 22, 2021 10:43 PM
> To: Justin He <Justin.He@arm.com>
> Cc: Petr Mladek <pmladek@suse.com>; Steven Rostedt <rostedt@goodmis.org>;
> Sergey Senozhatsky <senozhatsky@chromium.org>; Rasmus Villemoes
> <linux@rasmusvillemoes.dk>; Jonathan Corbet <corbet@lwn.net>; Alexander
> Viro <viro@zeniv.linux.org.uk>; Linus Torvalds <torvalds@linux-
> foundation.org>; Peter Zijlstra (Intel) <peterz@infradead.org>; Eric
> Biggers <ebiggers@google.com>; Ahmed S. Darwish <a.darwish@linutronix.de>;
> linux-doc@vger.kernel.org; linux-kernel@vger.kernel.org; linux-
> fsdevel@vger.kernel.org; Matthew Wilcox <willy@infradead.org>; Christoph
> Hellwig <hch@infradead.org>; nd <nd@arm.com>
> Subject: Re: [PATCH v5 0/4] make '%pD' print the full path of file
> 
> On Tue, Jun 22, 2021 at 10:06:30PM +0800, Jia He wrote:
> > Background
> > ==========
> > Linus suggested printing the full path of file instead of printing
> > the components as '%pd'.
> >
> > Typically, there is no need for printk specifiers to take any real locks
> > (ie mount_lock or rename_lock). So I introduce a new helper d_path_fast
> > which is similar to d_path except it doesn't take any seqlock/spinlock.
> >
> > This series is based on Al Viro's d_path cleanup patches [1] which
> > lifted the inner lockless loop into a new helper.
> >
> > Link: https://lkml.org/lkml/2021/5/18/1260 [1]
> >
> > Test
> > ====
> > The cases I tested:
> > 1. print '%pD' with full path of ext4 file
> > 2. mount a ext4 filesystem upon a ext4 filesystem, and print the file
> >    with '%pD'
> > 3. all test_print selftests, including the new '%14pD' '%-14pD'
> 
> > 4. kasnprintf
> 
> I believe you are talking about kasprintf().
> 
> 
> > Changelog
> > =========
> > v5:
> > - remove the RFC tag
> 
> JFYI, when we drop RFC we usually start the series from v1.
> 
> > - refine the commit msg/comments(by Petr, Andy)
> > - make using_scratch_space a new parameter of the test case
> 
> Thanks for the update, I have found few minor things, please address them
> and
> feel free to add
> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
> 

I assume I can add your R-b to patch 4/4 "add test cases for '%pD'" instead of
whole series, right?

--
Cheers,
Justin (Jia He)