From: Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>
To: Matthew Wilcox <willy-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
Cc: Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>,
Andrew Morton
<akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>,
Hugh Dickins <hughd-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
linux-afs-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
linux-btrfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-ext4-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
cluster-devel-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org,
linux-xfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-nilfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [PATCH 8/9] btrfs: handle a NULL folio in extent_range_redirty_for_io
Date: Wed, 18 Jan 2023 17:42:47 +0100 [thread overview]
Message-ID: <20230118164247.GC7584@lst.de> (raw)
In-Reply-To: <Y8gZmTFB6vCivxsY-FZi0V3Vbi30CUdFEqe4BF2D2FQJk+8+b@public.gmane.org>
On Wed, Jan 18, 2023 at 04:08:57PM +0000, Matthew Wilcox wrote:
> On Wed, Jan 18, 2023 at 10:43:28AM +0100, Christoph Hellwig wrote:
> > filemap_get_folio can return NULL, skip those cases.
>
> Hmm, I'm not sure that's true. We have one place that calls
> extent_range_redirty_for_io(), and it previously calls
> extent_range_clear_dirty_for_io() which has an explicit
>
> BUG_ON(!page); /* Pages should be in the extent_io_tree */
>
> so I'm going to say this one can't happen either. I haven't delved far
> enough into btrfs to figure out why it can't happen.
I'll drop this patch for now.
next prev parent reply other threads:[~2023-01-18 16:42 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20230118094329.9553-1-hch@lst.de>
2023-01-18 9:43 ` [PATCH 1/9] mm: don't look at xarray value entries in split_huge_pages_in_file Christoph Hellwig
2023-01-18 13:47 ` Matthew Wilcox
2023-01-18 9:43 ` [PATCH 2/9] mm: make mapping_get_entry available outside of filemap.c Christoph Hellwig
2023-01-18 13:49 ` Matthew Wilcox
2023-01-18 9:43 ` [PATCH 3/9] mm: use filemap_get_entry in filemap_get_incore_folio Christoph Hellwig
2023-01-18 13:49 ` Matthew Wilcox
2023-01-18 9:43 ` [PATCH 4/9] shmem: remove shmem_get_partial_folio Christoph Hellwig
2023-01-18 13:57 ` Brian Foster
2023-01-18 16:43 ` Christoph Hellwig
2023-01-18 16:50 ` Brian Foster
2023-01-18 9:43 ` [PATCH 5/9] shmem: open code the page cache lookup in shmem_get_folio_gfp Christoph Hellwig
2023-01-18 9:43 ` [PATCH 6/9] mm: remove FGP_ENTRY Christoph Hellwig
2023-01-18 9:43 ` [PATCH 7/9] gfs2: handle a NULL folio in gfs2_jhead_process_page Christoph Hellwig
2023-01-18 16:00 ` Matthew Wilcox
2023-01-18 16:24 ` Andreas Gruenbacher
2023-01-18 16:42 ` [Cluster-devel] " Christoph Hellwig
2023-01-18 9:43 ` [PATCH 8/9] btrfs: handle a NULL folio in extent_range_redirty_for_io Christoph Hellwig
2023-01-18 16:08 ` Matthew Wilcox
[not found] ` <Y8gZmTFB6vCivxsY-FZi0V3Vbi30CUdFEqe4BF2D2FQJk+8+b@public.gmane.org>
2023-01-18 16:42 ` Christoph Hellwig [this message]
2023-01-18 9:43 ` [PATCH 9/9] mm: return an ERR_PTR from __filemap_get_folio Christoph Hellwig
2023-01-18 12:39 ` Ryusuke Konishi
[not found] ` <CAKFNMomcjvUSh-nS1MqptYdiT-1frRsmHgx2mHBBm_588kprrQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2023-01-18 16:42 ` Christoph Hellwig
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