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From: Al Viro <viro@ZenIV.linux.org.uk>
To: Vineet Gupta <Vineet.Gupta1@synopsys.com>
Cc: "linux-arch@vger.kernel.org" <linux-arch@vger.kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Richard Henderson <rth@twiddle.net>,
	Russell King <linux@armlinux.org.uk>,
	Will Deacon <will.deacon@arm.com>,
	Haavard Skinnemoen <hskinnemoen@gmail.com>,
	Steven Miao <realmz6@gmail.com>,
	Jesper Nilsson <jesper.nilsson@axis.com>,
	Mark Salter <msalter@redhat.com>,
	Yoshinori Sato <ysato@users.sourceforge.jp>,
	Richard Kuo <rkuo@codeaurora.org>,
	Tony Luck <tony.luck@intel.com>,
	Geert Uytterhoeven <geert@linux-m68k.org>,
	James Hogan <james.hogan@imgtec.com>,
	Michal Simek <monstr@monstr.eu>,
	David Howells <dhowells@redhat.com>,
	Ley Foon Tan <lftan@altera.com>, Jonas Bonn <jonas@southpole.se>,
	Helge Deller <deller@gmx.de>,
	Martin Schwidefsky <schwidefsky@de.ibm.com>,
	Ralf Baechle <ralf@linux-mips.org>,
	Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	Chen Liqin <liqin.linux@gmail.com>,
	"David S. Miller" <davem@davemloft.net>,
	Chris Metcalf <cmetcalf@mellanox.com>,
	Richard Weinberger <richard@nod.at>,
	Guan Xuetao <gxt@mprc.pku.edu.cn>,
	Thomas Gleixner <tglx@linutronix.de>,
	Chris Zankel <chris@zankel.net>
Subject: Re: [RFC][CFT][PATCHSET v1] uaccess unification
Date: Wed, 29 Mar 2017 21:29:39 +0100	[thread overview]
Message-ID: <20170329202939.GI29622@ZenIV.linux.org.uk> (raw)
In-Reply-To: <3399faa9-795e-39db-42f5-7d1e10bbff9c@synopsys.com>

On Wed, Mar 29, 2017 at 01:08:12PM -0700, Vineet Gupta wrote:

> Hi Al,
> 
> Thx for taking this up. It seems ARC was missing INLINE_COPY* switch likely due to
> existing 2 variants (inline/out-of-line) we already have.
> I've added a patch for that (attached too) - boot tested the series on ARC.

BTW, I wonder if inlining all of the copy_{to,from}_user() is actually a win.
It's probably arch-dependent and it would be nice if somebody compared
performance with and without inlining those...  ARC, in particular, has
__arc_copy_{to,from}_user() inlining a whole lot, even in case of non-constant
size and your patch, AFAICS, will inline all of it in *all* cases.  It might
end up being a win, but that's not apriori obvious...  Do you have any
profiling results in that area?

  reply	other threads:[~2017-03-29 20:30 UTC|newest]

Thread overview: 41+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-03-29  5:57 [RFC][CFT][PATCHSET v1] uaccess unification Al Viro
2017-03-29 20:08 ` Vineet Gupta
2017-03-29 20:29   ` Al Viro [this message]
2017-03-29 20:37     ` Linus Torvalds
2017-03-29 21:03       ` Al Viro
2017-03-29 21:24         ` Linus Torvalds
2017-03-29 23:09           ` Al Viro
2017-03-29 23:43             ` Linus Torvalds
2017-03-30 15:31               ` Al Viro
2017-03-29 21:14     ` Vineet Gupta
2017-03-29 23:42       ` Al Viro
2017-03-30  0:02         ` Vineet Gupta
2017-03-30  0:27           ` Linus Torvalds
2017-03-30  1:15             ` Al Viro
2017-03-30 20:40             ` Vineet Gupta
2017-03-30 20:59               ` Linus Torvalds
2017-03-30 23:21                 ` Russell King - ARM Linux
2017-03-30 12:32 ` Martin Schwidefsky
2017-03-30 14:48   ` Al Viro
2017-03-30 16:22 ` Russell King - ARM Linux
2017-03-30 16:43   ` Al Viro
2017-03-30 17:18     ` Linus Torvalds
2017-03-30 18:48       ` Al Viro
2017-03-30 18:54         ` Al Viro
2017-03-30 18:59           ` Linus Torvalds
2017-03-30 19:10             ` Al Viro
2017-03-30 19:19               ` Linus Torvalds
2017-03-30 21:08                 ` Al Viro
2017-03-30 18:56         ` Linus Torvalds
2017-03-31  0:21 ` Kees Cook
2017-03-31 13:38   ` James Hogan
2017-04-03 16:27 ` James Morse
2017-04-04 20:26 ` Max Filippov
2017-04-04 20:52   ` Al Viro
2017-04-05  5:05 ` ia64 exceptions (Re: [RFC][CFT][PATCHSET v1] uaccess unification) Al Viro
2017-04-05  8:08   ` Al Viro
2017-04-05 18:44     ` Tony Luck
2017-04-05 20:33       ` Al Viro
2017-04-07  0:24 ` [RFC][CFT][PATCHSET v2] uaccess unification Al Viro
2017-04-07  0:35   ` Al Viro
     [not found] <CACVxJT8+fQqvpSPb9rTWFy6g7moqUqxi+Ewjcg0ykuqo=vm4Ow@mail.gmail.com>
2017-03-30 13:27 ` [RFC][CFT][PATCHSET v1] " Alexey Dobriyan

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