From: Omar Sandoval <osandov@osandov.com>
To: Johannes Weiner <hannes@cmpxchg.org>
Cc: linux-btrfs@vger.kernel.org, kernel-team@fb.com, linux-mm@kvack.org
Subject: Re: [PATCH v7 1/6] mm: split SWP_FILE into SWP_ACTIVATED and SWP_FS
Date: Wed, 19 Sep 2018 11:12:02 -0700 [thread overview]
Message-ID: <20180919181202.GJ479@vader> (raw)
In-Reply-To: <20180919180232.GB18068@cmpxchg.org>
On Wed, Sep 19, 2018 at 02:02:32PM -0400, Johannes Weiner wrote:
> On Tue, Sep 11, 2018 at 03:34:44PM -0700, Omar Sandoval wrote:
> > @@ -2411,8 +2412,10 @@ static int setup_swap_extents(struct swap_info_struct *sis, sector_t *span)
> >
> > if (mapping->a_ops->swap_activate) {
> > ret = mapping->a_ops->swap_activate(sis, swap_file, span);
> > + if (ret >= 0)
> > + sis->flags |= SWP_ACTIVATED;
> > if (!ret) {
> > - sis->flags |= SWP_FILE;
> > + sis->flags |= SWP_FS;
> > ret = add_swap_extent(sis, 0, sis->max, 0);
>
> Won't this single, linear extent be in conflict with the discontiguous
> extents you set up in your swap_activate callback in the last patch?
That's only in the case that ->swap_activate() returned 0, which only
nfs_swap_activate() will do. btrfs_swap_activate() and
iomap_swapfile_activate() both return the number of extents they set up.
next prev parent reply other threads:[~2018-09-19 18:12 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-11 22:34 [PATCH v7 0/6] Btrfs: implement swap file support Omar Sandoval
2018-09-11 22:34 ` [PATCH v7 1/6] mm: split SWP_FILE into SWP_ACTIVATED and SWP_FS Omar Sandoval
2018-09-19 18:02 ` Johannes Weiner
2018-09-19 18:12 ` Omar Sandoval [this message]
2018-09-19 18:41 ` Johannes Weiner
2018-10-12 20:59 ` Andrew Morton
2018-10-16 10:20 ` David Sterba
2018-09-11 22:34 ` [PATCH v7 2/6] mm: export add_swap_extent() Omar Sandoval
2018-09-19 18:09 ` Johannes Weiner
2018-09-19 18:28 ` Omar Sandoval
2018-09-19 18:43 ` Johannes Weiner
2018-10-12 20:59 ` Andrew Morton
2018-09-11 22:34 ` [PATCH v7 3/6] vfs: update swap_{,de}activate documentation Omar Sandoval
2018-09-11 22:34 ` [PATCH v7 4/6] Btrfs: prevent ioctls from interfering with a swap file Omar Sandoval
2018-09-11 22:34 ` [PATCH v7 5/6] Btrfs: rename get_chunk_map() and make it non-static Omar Sandoval
2018-09-11 22:34 ` [PATCH v7 6/6] Btrfs: support swap files Omar Sandoval
2018-09-19 17:29 ` [PATCH v7 0/6] Btrfs: implement swap file support Omar Sandoval
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