From: Borislav Petkov <bp@alien8.de>
To: Andy Lutomirski <luto@amacapital.net>
Cc: x86@kernel.org, linux-kernel@vger.kernel.org,
"Frédéric Weisbecker" <fweisbec@gmail.com>,
"Oleg Nesterov" <oleg@redhat.com>,
"kvm list" <kvm@vger.kernel.org>
Subject: Re: [PATCH 2/3] x86_64,entry: Use sysret to return to userspace when possible
Date: Thu, 8 Jan 2015 14:57:24 +0100 [thread overview]
Message-ID: <20150108135724.GC20632@pd.tnic> (raw)
In-Reply-To: <20150108122928.GB20632@pd.tnic>
On Thu, Jan 08, 2015 at 01:29:28PM +0100, Borislav Petkov wrote:
> Ok, dammit, it happened again:
Running -rc+ 2without your first two patches doesn't trigger it. Well,
I don't know what workload even triggered it, it used to happen during
system upgrade. I left the box without your patches to build the kernel
in a loop and went to lunch.
Now I'm back and it all still looks good.
I'll try running only with this second patch, i.e. the ret-to-user
SYSRET speedup thing. See what happens.
--
Regards/Gruss,
Boris.
Sent from a fat crate under my desk. Formatting is fine.
--
next prev parent reply other threads:[~2015-01-08 13:57 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-07 23:58 [PATCH 0/3] x86_64,entry: Rearrange the syscall exit optimizations Andy Lutomirski
2014-11-07 23:58 ` [PATCH 1/3] x86_64,entry: Fix RCX for traced syscalls Andy Lutomirski
2015-01-05 12:59 ` Borislav Petkov
2015-01-05 20:31 ` Andy Lutomirski
2015-01-06 15:34 ` Borislav Petkov
2015-01-06 18:43 ` Andy Lutomirski
2015-01-06 19:00 ` Borislav Petkov
2015-01-07 15:55 ` Borislav Petkov
2014-11-07 23:58 ` [PATCH 2/3] x86_64,entry: Use sysret to return to userspace when possible Andy Lutomirski
2015-01-08 12:29 ` Borislav Petkov
2015-01-08 13:57 ` Borislav Petkov [this message]
2015-01-10 21:05 ` Andy Lutomirski
2015-01-09 10:40 ` Borislav Petkov
2014-11-07 23:58 ` [PATCH 3/3] x86_64,entry: Remove the syscall exit audit and schedule optimizations Andy Lutomirski
2015-01-09 15:53 ` Borislav Petkov
2015-01-09 16:08 ` Andy Lutomirski
2014-12-04 1:42 ` [PATCH 0/3] x86_64,entry: Rearrange the syscall exit optimizations Andy Lutomirski
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