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[49.181.47.239]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-2d1c9c9f03csm1642587a91.26.2024.08.08.15.03.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 08 Aug 2024 15:03:44 -0700 (PDT) Received: from dave by dread.disaster.area with local (Exim 4.96) (envelope-from ) id 1scBET-00ACDg-2F; Fri, 09 Aug 2024 08:03:41 +1000 Date: Fri, 9 Aug 2024 08:03:41 +1000 From: Dave Chinner To: Josef Bacik Cc: kernel-team@fb.com, linux-fsdevel@vger.kernel.org, jack@suse.cz, amir73il@gmail.com, brauner@kernel.org, linux-xfs@vger.kernel.org, gfs2@lists.linux.dev, linux-bcachefs@vger.kernel.org Subject: Re: [PATCH v2 16/16] xfs: add pre-content fsnotify hook for write faults Message-ID: References: Precedence: bulk X-Mailing-List: linux-bcachefs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Thu, Aug 08, 2024 at 03:27:18PM -0400, Josef Bacik wrote: > xfs has it's own handling for write faults, so we need to add the > pre-content fsnotify hook for this case. Reads go through filemap_fault > so they're handled properly there. > > Signed-off-by: Josef Bacik > --- > fs/xfs/xfs_file.c | 20 +++++++++++++++++--- > 1 file changed, 17 insertions(+), 3 deletions(-) > > diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c > index 4cdc54dc9686..585a8c2eea0f 100644 > --- a/fs/xfs/xfs_file.c > +++ b/fs/xfs/xfs_file.c > @@ -1325,14 +1325,28 @@ __xfs_filemap_fault( > bool write_fault) > { > struct inode *inode = file_inode(vmf->vma->vm_file); > + struct file *fpin = NULL; > + vm_fault_t ret; > > trace_xfs_filemap_fault(XFS_I(inode), order, write_fault); > > - if (write_fault) > - return xfs_write_fault(vmf, order); > if (IS_DAX(inode)) > return xfs_dax_read_fault(vmf, order); > - return filemap_fault(vmf); > + > + if (!write_fault) > + return filemap_fault(vmf); Doesn't this break DAX read faults? i.e. they have to go through xfs_dax_read_fault(), not filemap_fault(). -Dave. -- Dave Chinner david@fromorbit.com