From mboxrd@z Thu Jan 1 00:00:00 1970 From: Manuel Reimer Subject: 3.15.4 runs *significantly* slower than 3.15.3 on iMX233 CPU Date: Mon, 07 Jul 2014 20:13:25 +0200 Message-ID: Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: Sender: linux-embedded-owner@vger.kernel.org List-ID: Content-Type: text/plain; charset="us-ascii"; format="flowed" To: linux-embedded@vger.kernel.org Hello, maybe someone can help me to find the reason for this problem: If I run my iMX233 development board with an 3.15.3 kernel, then the performance is much better as with an 3.15.4 kernel. I have the first significant "hanging" here: [ 7.910000] sd 0:0:0:0: [sda] Attached SCSI removable disk [ 10.810000] random: nonblocking pool is initialized [ 24.310000] systemd[1]: systemd 214 running in system mode. (+PAM -AUDIT -SELINUX -IMA -SYSVINIT +LIBCRYPTSETUP +GCRYPT +ACL +XZ +SECCOMP -APPARMOR) After booting up it takes several seconds between entering the username and the password while with version 3.15.3 the password prompt appears almost immediately after entering the username. Please tell me if some additional information is needed. Thank you very much in advance. Greetings, Manuel