linux-kernel - Re: [PATCH 16/21] x86/entry/64: Use a per-CPU trampoline stack for IDT entries

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Message-ID: <5b74d67c-8253-8585-c8c0-9e61e3f119b2@linux.intel.com>
Date:   Fri, 1 Dec 2017 13:21:50 -0800
From:   Dave Hansen <dave.hansen@...ux.intel.com>
To:     Andy Lutomirski <luto@...nel.org>
Cc:     Ingo Molnar <mingo@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        "H . Peter Anvin" <hpa@...or.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Borislav Petkov <bp@...en8.de>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH 16/21] x86/entry/64: Use a per-CPU trampoline stack for
 IDT entries

>>> [   30.811750] CR2: fffffffffdeb2f98 CR3: 0000000423fae001 CR4: 00000000001607e0
>>> [   30.819712] Call Trace:
>>> [   30.822442]  <SYSENTER>
>>> [   30.825170]  trace_hardirqs_on_thunk+0x1c/0x1c
>> ...
>>> [   31.000571] R13: 0000000000000050 R14: 0000000000000076 R15: 00007f59f76f2d60
>>> [   31.008533]  </SYSENTER>
>>
>> Should we change that string to something more descriptive?
> 
> I suppose we could rename it to "ENTRY_TRAMPOLINE" or something like that.

The attached patch does just that.  Any objections?

View attachment "SYSENTER-rename.patch" of type "text/x-patch" (1200 bytes)