From: Andi Kleen <andi@firstfloor.org>
To: Andi Kleen <andi@firstfloor.org>
Cc: Andy Lutomirski <luto@amacapital.net>,
Andi Kleen <ak@linux.intel.com>, X86 ML <x86@kernel.org>,
Andrew Lutomirski <luto@kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Steven Rostedt <rostedt@goodmis.org>,
Borislav Petkov <bp@alien8.de>,
JBeulich@suse.com
Subject: Re: [PATCH 4/8] x86: Add support for rd/wr fs/gs base
Date: Sat, 11 Apr 2015 01:16:35 +0200 [thread overview]
Message-ID: <20150410231634.GE2366@two.firstfloor.org> (raw)
In-Reply-To: <20150410230546.GA2366@two.firstfloor.org>
On Sat, Apr 11, 2015 at 01:05:46AM +0200, Andi Kleen wrote:
> > One might argue that this code serves no purpose, but it's there, so
> > we had better keep our per-invocation usage of DEBUG_STACK within 4k.
>
> Only if you run NKLD. I doubt KDB or GDB support nesting.
> We can ask Jan if he still uses it.
Thinking about it more we likely still need it for kprobes,
in case someone sets them into the int3 or debug path.
-Andi
--
ak@linux.intel.com -- Speaking for myself only.
next prev parent reply other threads:[~2015-04-10 23:16 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-10 15:50 Updated RD/WRFS/GSBASE patchkit Andi Kleen
2015-04-10 15:50 ` [PATCH 1/8] percpu: Add a DEFINE_PER_CPU_2PAGE_ALIGNED Andi Kleen
2015-04-10 15:50 ` [PATCH 2/8] x86: Naturally align the debug IST stack Andi Kleen
2015-04-10 18:50 ` Andy Lutomirski
2015-04-10 15:50 ` [PATCH 3/8] x86: Add intrinsics/macros for new rd/wr fs/gs base instructions Andi Kleen
2015-04-10 19:06 ` Andy Lutomirski
2015-04-10 19:07 ` Andy Lutomirski
2015-04-10 15:50 ` [PATCH 4/8] x86: Add support for rd/wr fs/gs base Andi Kleen
2015-04-10 19:12 ` Andy Lutomirski
2015-04-10 20:21 ` Andi Kleen
2015-04-10 20:25 ` Borislav Petkov
2015-04-10 20:52 ` Andi Kleen
2015-04-10 20:53 ` Borislav Petkov
2015-04-10 20:34 ` Andy Lutomirski
2015-04-10 20:41 ` Andi Kleen
2015-04-10 20:47 ` Andy Lutomirski
2015-04-10 20:57 ` Andi Kleen
2015-04-10 21:07 ` Andy Lutomirski
2015-04-10 22:52 ` Andi Kleen
2015-04-10 23:00 ` Andy Lutomirski
2015-04-10 23:05 ` Andi Kleen
2015-04-10 23:15 ` Andy Lutomirski
2015-04-10 23:18 ` Andi Kleen
2015-04-10 23:21 ` Andy Lutomirski
2015-04-10 23:16 ` Andi Kleen [this message]
2015-04-13 7:07 ` Jan Beulich
2015-04-10 15:50 ` [PATCH 5/8] x86: Make old K8 swapgs workaround conditional Andi Kleen
2015-04-10 21:46 ` Andy Lutomirski
2015-04-10 22:01 ` Borislav Petkov
2015-04-10 23:10 ` Andi Kleen
2015-04-11 7:18 ` Borislav Petkov
2015-04-10 15:50 ` [PATCH 6/8] x86: Enumerate kernel FSGS capability in AT_HWCAP2 Andi Kleen
2015-04-10 19:15 ` Andy Lutomirski
2015-04-10 22:14 ` Borislav Petkov
2015-04-10 23:07 ` Andi Kleen
2015-04-10 23:08 ` Andi Kleen
2015-04-11 7:16 ` Borislav Petkov
2015-04-11 8:35 ` Intel FSGSBASE support (was: Re: [PATCH 6/8] x86: Enumerate kernel FSGS capability in AT_HWCAP2) Ingo Molnar
2015-04-10 15:50 ` [PATCH 7/8] x86: Add documentation for rd/wr fs/gs base Andi Kleen
2015-04-10 19:17 ` Andy Lutomirski
2015-04-10 20:22 ` Andi Kleen
2015-04-10 20:38 ` Andy Lutomirski
2015-04-10 20:46 ` Andi Kleen
2015-04-10 20:52 ` Andy Lutomirski
2015-04-10 15:50 ` [PATCH 8/8] x86: Use rd/wr fs/gs base in arch_prctl Andi Kleen
2015-04-10 19:19 ` Andy Lutomirski
2015-04-10 19:58 ` Andi Kleen
-- strict thread matches above, loose matches on Subject: below --
2014-11-10 23:55 [PATCH 1/8] percpu: Add a DEFINE_PER_CPU_2PAGE_ALIGNED Andi Kleen
2014-11-10 23:55 ` [PATCH 4/8] x86: Add support for rd/wr fs/gs base Andi Kleen
2014-11-11 20:05 ` Andy Lutomirski
2014-11-11 20:49 ` Andy Lutomirski
2014-10-15 5:11 [PATCH 1/8] percpu: Add a DEFINE_PER_CPU_2PAGE_ALIGNED Andi Kleen
2014-10-15 5:11 ` [PATCH 4/8] x86: Add support for rd/wr fs/gs base Andi Kleen
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