From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-lb0-f169.google.com (mail-lb0-f169.google.com [209.85.217.169]) by kanga.kvack.org (Postfix) with ESMTP id 918476B0035 for ; Wed, 24 Sep 2014 04:57:30 -0400 (EDT) Received: by mail-lb0-f169.google.com with SMTP id b12so10302450lbj.0 for ; Wed, 24 Sep 2014 01:57:29 -0700 (PDT) Received: from mx2.suse.de (cantor2.suse.de. [195.135.220.15]) by mx.google.com with ESMTPS id e7si21929847lag.100.2014.09.24.01.57.26 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Wed, 24 Sep 2014 01:57:27 -0700 (PDT) Date: Wed, 24 Sep 2014 10:57:24 +0200 From: Jan Kara Subject: Re: [PATCH 2/2] ext4: Fix mmap data corruption when blocksize < pagesize Message-ID: <20140924085724.GA21864@quack.suse.cz> References: <1411484603-17756-1-git-send-email-jack@suse.cz> <1411484603-17756-3-git-send-email-jack@suse.cz> <20140924084519.GA21987@quack.suse.cz> MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="MGYHOYXEY6WxJCY8" Content-Disposition: inline In-Reply-To: <20140924084519.GA21987@quack.suse.cz> Sender: owner-linux-mm@kvack.org List-ID: To: linux-fsdevel@vger.kernel.org Cc: linux-mm@kvack.org, Dave Chinner , linux-ext4@vger.kernel.org, Ted Tso , Jan Kara , xfs@oss.sgi.com --MGYHOYXEY6WxJCY8 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Wed 24-09-14 10:45:19, Jan Kara wrote: > On Tue 23-09-14 17:03:23, Jan Kara wrote: > > Use block_create_hole() when hole is being created in a file so that > > ->page_mkwrite() will get called for the partial tail page if it is > > mmaped (see the first patch in the series for details). > Just out of curiosity I did a change similar to this one for ext4 to XFS > and indeed it fixed generic/030 test failures for XFS with blocksize 1k. Just for reference attached the patch I was testing - I can resend with proper changelog etc. if people are fine with this approach. Honza > > Signed-off-by: Jan Kara > > --- > > fs/ext4/inode.c | 6 +++++- > > 1 file changed, 5 insertions(+), 1 deletion(-) > > > > diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c > > index 3aa26e9117c4..fdcb007c2c9e 100644 > > --- a/fs/ext4/inode.c > > +++ b/fs/ext4/inode.c > > @@ -4536,8 +4536,12 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr) > > ext4_orphan_del(NULL, inode); > > goto err_out; > > } > > - } else > > + } else { > > + loff_t old_size = inode->i_size; > > + > > i_size_write(inode, attr->ia_size); > > + block_create_hole(inode, old_size, inode->i_size); > > + } > > > > /* > > * Blocks are going to be removed from the inode. Wait > > -- > > 1.8.1.4 > > > -- > Jan Kara > SUSE Labs, CR > -- > To unsubscribe from this list: send the line "unsubscribe linux-ext4" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- Jan Kara SUSE Labs, CR --MGYHOYXEY6WxJCY8 Content-Type: text/x-patch; charset=us-ascii Content-Disposition: attachment; filename="0001-xfs-Fix-mmap-data-corruption.patch" --MGYHOYXEY6WxJCY8--