From: Borislav Petkov <bp@alien8.de>
To: Ingo Molnar <mingo@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
"H. Peter Anvin" <hpa@zytor.com>,
Thomas Gleixner <tglx@linutronix.de>,
Andy Lutomirski <luto@amacapital.net>,
Denys Vlasenko <dvlasenk@redhat.com>,
lkml <linux-kernel@vger.kernel.org>
Subject: Re: [RFC PATCH] Drop some asm from copy_user_64.S
Date: Wed, 13 May 2015 12:43:30 +0200 [thread overview]
Message-ID: <20150513104330.GG1517@pd.tnic> (raw)
In-Reply-To: <20150513103140.GA5113@gmail.com>
On Wed, May 13, 2015 at 12:31:40PM +0200, Ingo Molnar wrote:
> So why should an alternatives-CALL, inlined directly into call sites,
> cost more kernel space?
Not the alternatives CALL alone but inlining _copy_*_user with all the
preparation glue around it would. Basically what we're doing currently.
See how uninlining copy_user_generic() dropped text size from 12375798 to
12269658.
But let me do some more staring...
--
Regards/Gruss,
Boris.
ECO tip #101: Trim your mails when you reply.
--
next prev parent reply other threads:[~2015-05-13 10:43 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-12 20:57 [RFC PATCH] Drop some asm from copy_user_64.S Borislav Petkov
2015-05-12 21:13 ` Linus Torvalds
2015-05-12 21:53 ` Borislav Petkov
2015-05-13 9:52 ` Borislav Petkov
2015-05-13 10:31 ` Ingo Molnar
2015-05-13 10:43 ` Borislav Petkov [this message]
2015-05-13 10:46 ` Ingo Molnar
2015-05-13 11:16 ` Borislav Petkov
2015-05-13 16:02 ` Linus Torvalds
2015-05-14 9:36 ` Borislav Petkov
2015-05-13 6:19 ` Ingo Molnar
2015-05-13 10:28 ` Borislav Petkov
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