From: Borislav Petkov <bp@alien8.de>
To: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>,
Tony Luck <tony.luck@intel.com>,
linux-kernel@vger.kernel.org,
Thomas Gleixner <tglx@linutronix.de>,
"H. Peter Anvin" <hpa@zytor.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH v11 3/4] x86, mce: Add __mcsafe_copy()
Date: Thu, 18 Feb 2016 11:29:09 +0100 [thread overview]
Message-ID: <20160218102909.GC3694@pd.tnic> (raw)
In-Reply-To: <20160218101942.GA9386@gmail.com>
On Thu, Feb 18, 2016 at 11:19:42AM +0100, Ingo Molnar wrote:
> > I think the whole notion of mcsafe here is 'wrong'. This copy variant simply
> > reports the kind of trap that happened (#PF or #MC) and could arguably be
> > extended to include more types if the hardware were to generate more.
It is safe in the sense that when you get an MCE while shuffling data
here, in the kernel, you don't die but you recover. Thus the exception
handling games.
So _safe() really sounds fitting here.
--
Regards/Gruss,
Boris.
ECO tip #101: Trim your mails when you reply.
next prev parent reply other threads:[~2016-02-18 10:29 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-17 18:20 [PATCH v11 0/4] Machine check recovery when kernel accesses poison Tony Luck
2016-02-17 18:20 ` [PATCH v11 1/4] x86: Expand exception table to allow new handling options Tony Luck
2016-02-18 10:19 ` [tip:ras/core] x86/mm: Expand the exception table logic " tip-bot for Tony Luck
2016-02-17 18:20 ` [PATCH v11 2/4] x86, mce: Check for faults tagged in EXTABLE_CLASS_FAULT exception table entries Tony Luck
2016-02-18 10:19 ` [tip:ras/core] x86/mce: " tip-bot for Tony Luck
2016-02-17 18:20 ` [PATCH v11 3/4] x86, mce: Add __mcsafe_copy() Tony Luck
2016-02-18 8:21 ` Ingo Molnar
2016-02-18 9:59 ` Peter Zijlstra
2016-02-18 10:19 ` Ingo Molnar
2016-02-18 10:29 ` Borislav Petkov [this message]
2016-02-18 10:35 ` Peter Zijlstra
2016-02-18 14:59 ` Luck, Tony
2016-02-19 7:58 ` Ingo Molnar
2016-02-19 8:43 ` Peter Zijlstra
2016-02-19 9:51 ` Ingo Molnar
2016-02-18 10:29 ` Borislav Petkov
2016-02-18 10:34 ` Ingo Molnar
2016-02-18 10:36 ` Borislav Petkov
2016-02-18 18:48 ` Ingo Molnar
2016-02-18 21:14 ` [PATCH v12] x86, mce: Add memcpy_trap() Luck, Tony
2016-02-19 9:10 ` Ingo Molnar
2016-02-19 17:53 ` [PATCH v13] " Luck, Tony
2016-02-24 17:38 ` Tony Luck
2016-02-24 18:35 ` Linus Torvalds
2016-02-24 19:27 ` Tony Luck
2016-02-24 19:37 ` Linus Torvalds
2016-02-25 8:56 ` Ingo Molnar
2016-02-25 19:33 ` Luck, Tony
2016-02-25 20:39 ` Linus Torvalds
2016-02-25 22:11 ` Andy Lutomirski
2016-02-18 19:47 ` [PATCH v14] x86, mce: Add memcpy_mcsafe() Tony Luck
2016-03-02 20:47 ` Luck, Tony
2016-03-08 17:37 ` [tip:ras/core] x86/mm, x86/mce: " tip-bot for Tony Luck
2016-03-10 19:26 ` [PATCH v14] x86, mce: " Mika Penttilä
2016-03-10 19:37 ` Luck, Tony
2016-03-11 22:10 ` Tony Luck
2016-03-11 22:14 ` Dan Williams
2016-03-12 17:16 ` Ingo Molnar
2016-03-13 1:12 ` Linus Torvalds
2016-03-13 9:25 ` Ingo Molnar
2016-03-14 22:33 ` [PATCH] x86/mm, x86/mce: Fix return type/value for memcpy_mcsafe() Tony Luck
2016-03-16 8:06 ` [tip:x86/urgent] " tip-bot for Tony Luck
2016-02-26 0:58 ` [PATCH v13] x86, mce: Add memcpy_trap() Linus Torvalds
2016-02-26 1:19 ` Andy Lutomirski
2016-02-26 2:38 ` Linus Torvalds
2016-02-18 18:12 ` [PATCH v11 3/4] x86, mce: Add __mcsafe_copy() Linus Torvalds
2016-02-18 18:51 ` Ingo Molnar
2016-02-18 18:52 ` Luck, Tony
2016-02-18 20:14 ` Ingo Molnar
2016-02-18 21:33 ` Dan Williams
2016-02-17 18:20 ` [PATCH v11 4/4] x86: Create a new synthetic cpu capability for machine check recovery Tony Luck
2016-02-18 10:19 ` [tip:x86/asm] x86/cpufeature: " tip-bot for Tony Luck
-- strict thread matches above, loose matches on Subject: below --
2016-02-11 21:34 [PATCH v11 0/4] Machine check recovery when kernel accesses poison Tony Luck
2016-02-11 21:34 ` [PATCH v11 3/4] x86, mce: Add __mcsafe_copy() Tony Luck
2016-02-11 21:34 ` Tony Luck
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