Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
From:   Jarkko Nikula <jarkko.nikula@linux.intel.com>
Subject: Suspend-to-ram/resume regression with commit ca37e57bbe0c
To:     linux-kernel <linux-kernel@vger.kernel.org>
Cc:     Andy Lutomirski <luto@kernel.org>, Ingo Molnar <mingo@kernel.org>
Message-ID: <0fede9f9-88b0-a6e7-1027-dfb2019b8ef2@linux.intel.com>
Date:   Tue, 28 Nov 2017 16:35:26 +0200
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101
 Thunderbird/52.4.0
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Language: en-US
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Hi

Suspend-to-ram and resume stopped working on v4.15-rc1 and I bisected it 
to commit ca37e57bbe0c ("x86/entry/64: Add missing irqflags tracing to 
native_load_gs_index()").

I noticed it on Intel Kabylake (core) and Apollolake (atom) based 
prototype machines. Symptoms are that machine appears to enter into 
suspend but resumes instantly and hangs. Unfortunately no logs.

If I revert ca37e57bbe0c on v4.15-rc1 it works as expected.

-- 
Jarkko

From 1585306388033428270@xxx Tue Nov 28 10:46:25 +0000 2017
X-GM-THRID: 1585304791086463148
X-Gmail-Labels: Inbox,Category Forums,HistoricalUnread