From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:32894 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755293AbdCJIkA (ORCPT ); Fri, 10 Mar 2017 03:40:00 -0500 Subject: Patch "hv: allocate synic pages for all present CPUs" has been added to the 4.10-stable tree To: vkuznets@redhat.com, gregkh@linuxfoundation.org, kys@microsoft.com Cc: , From: Date: Fri, 10 Mar 2017 09:38:37 +0100 Message-ID: <14891351177056@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled hv: allocate synic pages for all present CPUs to the 4.10-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: hv-allocate-synic-pages-for-all-present-cpus.patch and it can be found in the queue-4.10 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 421b8f20d3c381b215f988b42428f56fc3b82405 Mon Sep 17 00:00:00 2001 From: Vitaly Kuznetsov Date: Wed, 7 Dec 2016 01:16:25 -0800 Subject: hv: allocate synic pages for all present CPUs From: Vitaly Kuznetsov commit 421b8f20d3c381b215f988b42428f56fc3b82405 upstream. It may happen that not all CPUs are online when we do hv_synic_alloc() and in case more CPUs come online later we may try accessing these allocated structures. Signed-off-by: Vitaly Kuznetsov Signed-off-by: K. Y. Srinivasan Signed-off-by: Greg Kroah-Hartman --- drivers/hv/hv.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/drivers/hv/hv.c +++ b/drivers/hv/hv.c @@ -411,7 +411,7 @@ int hv_synic_alloc(void) goto err; } - for_each_online_cpu(cpu) { + for_each_present_cpu(cpu) { hv_context.event_dpc[cpu] = kmalloc(size, GFP_ATOMIC); if (hv_context.event_dpc[cpu] == NULL) { pr_err("Unable to allocate event dpc\n"); @@ -482,7 +482,7 @@ void hv_synic_free(void) int cpu; kfree(hv_context.hv_numa_map); - for_each_online_cpu(cpu) + for_each_present_cpu(cpu) hv_synic_free_cpu(cpu); } Patches currently in stable-queue which might be from vkuznets@redhat.com are queue-4.10/hv-init-percpu_list-in-hv_synic_alloc.patch queue-4.10/drivers-hv-vmbus-raise-retry-wait-limits-in-vmbus_post_msg.patch queue-4.10/hv-allocate-synic-pages-for-all-present-cpus.patch queue-4.10/hv-don-t-reset-hv_context.tsc_page-on-crash.patch