From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matthew Wilcox Subject: [PATCH v2 2/6] dax: Use copy_from_iter_nocache Date: Fri, 3 Jul 2015 10:40:39 -0400 Message-ID: <1435934443-17090-3-git-send-email-matthew.r.wilcox@intel.com> References: <1435934443-17090-1-git-send-email-matthew.r.wilcox@intel.com> Cc: Matthew Wilcox To: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, Alexander Viro Return-path: In-Reply-To: <1435934443-17090-1-git-send-email-matthew.r.wilcox@intel.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-fsdevel.vger.kernel.org From: Matthew Wilcox When userspace does a write, there's no need for the written data to pollute the CPU cache. This matches the original XIP code. Signed-off-by: Matthew Wilcox --- fs/dax.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/dax.c b/fs/dax.c index 99b5fbc..eaa9e06 100644 --- a/fs/dax.c +++ b/fs/dax.c @@ -155,7 +155,7 @@ static ssize_t dax_io(struct inode *inode, struct iov_iter *iter, } if (iov_iter_rw(iter) == WRITE) - len = copy_from_iter(addr, max - pos, iter); + len = copy_from_iter_nocache(addr, max - pos, iter); else if (!hole) len = copy_to_iter(addr, max - pos, iter); else -- 2.1.4