From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Lin Feng Subject: [PATCH V3 2/2] fs/aio.c: use get_user_pages_non_movable() to pin ring pages when support memory hotremove Date: Thu, 21 Feb 2013 19:01:44 +0800 Message-Id: <1361444504-31888-3-git-send-email-linfeng@cn.fujitsu.com> In-Reply-To: <1361444504-31888-1-git-send-email-linfeng@cn.fujitsu.com> References: <1361444504-31888-1-git-send-email-linfeng@cn.fujitsu.com> Sender: owner-linux-mm@kvack.org List-ID: To: akpm@linux-foundation.org, mgorman@suse.de, bcrl@kvack.org, viro@zeniv.linux.org.uk 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, tangchen@cn.fujitsu.com, guz.fnst@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 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 2512232..193e145 100644 --- a/fs/aio.c +++ b/fs/aio.c @@ -210,8 +210,8 @@ static int aio_setup_ring(struct kioctx *ctx) } pr_debug("mmap address: 0x%08lx\n", ctx->mmap_base); - ctx->nr_pages = get_user_pages(current, mm, ctx->mmap_base, nr_pages, - 1, 0, ctx->ring_pages, NULL); + ctx->nr_pages = get_user_pages_non_movable(current, mm, ctx->mmap_base, + nr_pages, 1, 0, ctx->ring_pages, NULL); up_write(&mm->mmap_sem); if (unlikely(ctx->nr_pages != nr_pages)) { -- 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