From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pg0-f69.google.com (mail-pg0-f69.google.com [74.125.83.69]) by kanga.kvack.org (Postfix) with ESMTP id AB80D6B026E for ; Fri, 9 Dec 2016 16:09:09 -0500 (EST) Received: by mail-pg0-f69.google.com with SMTP id p66so64405527pga.4 for ; Fri, 09 Dec 2016 13:09:09 -0800 (PST) Received: from mga01.intel.com (mga01.intel.com. [192.55.52.88]) by mx.google.com with ESMTPS id 75si35260400pfv.196.2016.12.09.13.09.08 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 09 Dec 2016 13:09:08 -0800 (PST) From: Tim Chen Subject: [PATCH v4 8/9] mm/swap: Enable swap slots cache usage Date: Fri, 9 Dec 2016 13:09:21 -0800 Message-Id: <6ffe3c7e6a5dcba2e565d5eca16604ce3ade7bfa.1481317367.git.tim.c.chen@linux.intel.com> In-Reply-To: References: In-Reply-To: References: Sender: owner-linux-mm@kvack.org List-ID: To: Andrew Morton Cc: Tim Chen , Ying Huang , dave.hansen@intel.com, ak@linux.intel.com, aaron.lu@intel.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Hugh Dickins , Shaohua Li , Minchan Kim , Rik van Riel , Andrea Arcangeli , "Kirill A . Shutemov" , Vladimir Davydov , Johannes Weiner , Michal Hocko , Hillf Danton , Christian Borntraeger , Jonathan Corbet Initialize swap slots cache and enable it on swap on. Drain all swap slots on swap off. Signed-off-by: Tim Chen --- mm/swapfile.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/mm/swapfile.c b/mm/swapfile.c index 3a6cad1..2440cec 100644 --- a/mm/swapfile.c +++ b/mm/swapfile.c @@ -2184,6 +2184,8 @@ SYSCALL_DEFINE1(swapoff, const char __user *, specialfile) spin_unlock(&p->lock); spin_unlock(&swap_lock); + disable_swap_slots_cache_lock(); + set_current_oom_origin(); err = try_to_unuse(p->type, false, 0); /* force unuse all pages */ clear_current_oom_origin(); @@ -2191,9 +2193,12 @@ SYSCALL_DEFINE1(swapoff, const char __user *, specialfile) if (err) { /* re-insert swap space back into swap_list */ reinsert_swap_info(p); + reenable_swap_slots_cache_unlock(); goto out_dput; } + reenable_swap_slots_cache_unlock(); + flush_work(&p->discard_work); destroy_swap_extents(p); @@ -2871,6 +2876,8 @@ SYSCALL_DEFINE2(swapon, const char __user *, specialfile, int, swap_flags) putname(name); if (inode && S_ISREG(inode->i_mode)) inode_unlock(inode); + if (!error) + enable_swap_slots_cache(); return error; } -- 2.5.5 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org