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From: Josh Poimboeuf <jpoimboe@redhat.com>
To: Andrei Vagin <avagin@virtuozzo.com>
Cc: x86@kernel.org, linux-kernel@vger.kernel.org,
	Ingo Molnar <mingo@kernel.org>,
	torvalds@linux-foundation.org, peterz@infradead.org,
	hpa@zytor.com, tglx@linutronix.de,
	Andy Lutomirski <luto@kernel.org>
Subject: Re: [PATCH 1/3] x86/entry: Fix idtentry unwind hint
Date: Thu, 26 Oct 2017 10:24:29 -0500	[thread overview]
Message-ID: <20171026152429.77dkjuwwsocou54t@treble> (raw)
In-Reply-To: <20171025210737.GA16091@outlook.office365.com>

On Wed, Oct 25, 2017 at 02:07:38PM -0700, Andrei Vagin wrote:
> Hi Josh,
> 
> Here is one more warning:
> [    5.852094] WARNING: can't dereference iret registers at ffffb6ce01b7ffe0 for ip entry_SYSCALL_64_fastpath+0xa/0xc2

Thanks, I hadn't seen this one yet.

I suspect this is in the middle of the ENABLE_INTERRUPTS() paravirt
code, which would mean this is another issue that will be fixed by my
"Make pv ops code generation more closely match reality" patches.

If you can share either the entry_64.o file or the .config, and what
virt platform it's running on (kvm, xen, native), I should be able to
confirm the issue.

I'm in Prague this week but I should have a v2 of those patches in a
week or two (will cc you).

-- 
Josh

  reply	other threads:[~2017-10-26 15:25 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-10-20 16:21 Josh Poimboeuf
2017-10-20 16:21 ` [PATCH 2/3] x86/unwind: Show function name+offset in ORC error messages Josh Poimboeuf
2017-10-23 12:44   ` [tip:x86/asm] " tip-bot for Josh Poimboeuf
2017-10-20 16:21 ` [PATCH 3/3] x86/asm: Don't use the confusing '.ifeq' directive Josh Poimboeuf
2017-10-23 12:44   ` [tip:x86/asm] " tip-bot for Josh Poimboeuf
2017-10-23 12:43 ` [tip:x86/asm] x86/entry: Fix idtentry unwind hint tip-bot for Josh Poimboeuf
2017-10-25 21:07 ` [PATCH 1/3] " Andrei Vagin
2017-10-26 15:24   ` Josh Poimboeuf [this message]
2017-10-26 16:42     ` Andrei Vagin
2017-11-13 22:06     ` Andrei Vagin
2017-11-13 22:59       ` Josh Poimboeuf
     [not found]         ` <AM4PR08MB07393706B7D76768D4817AC2CF0C0@AM4PR08MB0739.eurprd08.prod.outlook.com>
2017-12-20  6:34           ` Josh Poimboeuf

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