From mboxrd@z Thu Jan 1 00:00:00 1970 From: Daniel Lezcano Subject: very slow IO after resume Date: Thu, 02 Jan 2014 12:33:14 +0100 Message-ID: <52C54E7A.3030303@linaro.org> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from mail-we0-f173.google.com ([74.125.82.173]:63988 "EHLO mail-we0-f173.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750738AbaABLdS (ORCPT ); Thu, 2 Jan 2014 06:33:18 -0500 Received: by mail-we0-f173.google.com with SMTP id u57so12218433wes.4 for ; Thu, 02 Jan 2014 03:33:17 -0800 (PST) Sender: linux-pm-owner@vger.kernel.org List-Id: linux-pm@vger.kernel.org To: Linux PM mailing list , Linux Kernel Mailing List Hi All, I noticed an issue on the IOs after resuming my laptop. My mailer thunderbird or the compilations are very slow, often blocked=20 in 'D' state. The 'top' shows 81% on wait. The processes stack are always in when blocked: [] balance_dirty_pages.isra.18+0x3f5/0x4b4 [] balance_dirty_pages_ratelimited+0xde/0x100 [] generic_perform_write+0x141/0x1c0 [] generic_file_buffered_write+0x50/0x80 [] __generic_file_aio_write+0x22a/0x490 [] generic_file_aio_write+0x63/0xd0 [] ext4_file_write+0xb2/0x100 [] do_sync_write+0x6a/0xa0 [] vfs_write+0xa5/0x1d0 [] SyS_write+0x57/0xa0 [] syscall_call+0x7/0xb The kernel is 3.11.0-031100-generic based on ubuntu, I noticed this=20 issue on some previous version (since 3.5 AFAIR). My laptop is a Lenovo X230, SSD 250GB (6Gb/s) and 16GB of RAM. Is it a known issue ? Thanks -- Daniel --=20 Linaro.org =E2=94=82 Open source software fo= r ARM SoCs =46ollow Linaro: Facebook | Twitter | Blog