From mboxrd@z Thu Jan 1 00:00:00 1970 From: Lin Feng Subject: [PATCH V2 2/2] fs/aio.c: use get_user_pages_non_movable() to pin ring pages when support memory hotremove Date: Tue, 5 Feb 2013 17:21:53 +0800 Message-ID: <1360056113-14294-3-git-send-email-linfeng@cn.fujitsu.com> References: <1360056113-14294-1-git-send-email-linfeng@cn.fujitsu.com> Cc: khlebnikov@openvz.org, walken@google.com, kamezawa.hiroyu@jp.fujitsu.com, minchan@kernel.org, riel@redhat.com, rientjes@google.com, isimatu.yasuaki@jp.fujitsu.com, wency@cn.fujitsu.com, laijs@cn.fujitsu.com, jiang.liu@huawei.com, zab@redhat.com, jmoyer@redhat.com, linux-mm@kvack.org, linux-aio@kvack.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, Lin Feng To: akpm@linux-foundation.org, mgorman@suse.de, bcrl@kvack.org, viro@zeniv.linux.org.uk Return-path: In-Reply-To: <1360056113-14294-1-git-send-email-linfeng@cn.fujitsu.com> Sender: owner-linux-mm@kvack.org List-Id: linux-fsdevel.vger.kernel.org This patch gets around the aio ring pages can't be migrated bug caused by get_user_pages() via using the new function. It only works as configed with CONFIG_MEMORY_HOTREMOVE, otherwise it falls back to use the old version of get_user_pages(). Cc: Benjamin LaHaise Cc: Alexander Viro Cc: Andrew Morton Cc: Jeff Moyer Cc: Minchan Kim Cc: Zach Brown Reviewed-by: Tang Chen Reviewed-by: Gu Zheng Signed-off-by: Lin Feng --- fs/aio.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) diff --git a/fs/aio.c b/fs/aio.c index 71f613c..f7a0d5c 100644 --- a/fs/aio.c +++ b/fs/aio.c @@ -138,8 +138,8 @@ static int aio_setup_ring(struct kioctx *ctx) } dprintk("mmap address: 0x%08lx\n", info->mmap_base); - info->nr_pages = get_user_pages(current, ctx->mm, - info->mmap_base, nr_pages, + info->nr_pages = get_user_pages_non_movable(current, ctx->mm, + info->mmap_base, nr_pages, 1, 0, info->ring_pages, NULL); up_write(&ctx->mm->mmap_sem); -- 1.7.1 -- 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