From: "Darrick J. Wong" <darrick.wong@oracle.com>
To: Christoph Hellwig <hch@lst.de>
Cc: linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org,
linux-mm@kvack.org
Subject: Re: [PATCH 12/18] xfs: remove the imap_valid flag
Date: Wed, 30 May 2018 10:44:39 -0700 [thread overview]
Message-ID: <20180530174439.GP837@magnolia> (raw)
In-Reply-To: <20180530100013.31358-13-hch@lst.de>
On Wed, May 30, 2018 at 12:00:07PM +0200, Christoph Hellwig wrote:
> Simplify the way we check for a valid imap - we know we have a valid
> mapping after xfs_map_blocks returned successfully, and we know we can
> call xfs_imap_valid on any imap, as it will always fail on a
> zero-initialized map.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
Looks ok,
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
--D
> ---
> fs/xfs/xfs_aops.c | 11 ++---------
> 1 file changed, 2 insertions(+), 9 deletions(-)
>
> diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c
> index 7dc13b0aae60..910b410e5a90 100644
> --- a/fs/xfs/xfs_aops.c
> +++ b/fs/xfs/xfs_aops.c
> @@ -42,7 +42,6 @@
> */
> struct xfs_writepage_ctx {
> struct xfs_bmbt_irec imap;
> - bool imap_valid;
> unsigned int io_type;
> struct xfs_ioend *ioend;
> sector_t last_block;
> @@ -858,10 +857,6 @@ xfs_writepage_map(
> continue;
> }
>
> - /* Check to see if current map spans this file offset */
> - if (wpc->imap_valid)
> - wpc->imap_valid = xfs_imap_valid(inode, &wpc->imap,
> - file_offset);
> /*
> * If we don't have a valid map, now it's time to get a new one
> * for this offset. This will convert delayed allocations
> @@ -869,16 +864,14 @@ xfs_writepage_map(
> * a valid map, it means we landed in a hole and we skip the
> * block.
> */
> - if (!wpc->imap_valid) {
> + if (!xfs_imap_valid(inode, &wpc->imap, file_offset)) {
> error = xfs_map_blocks(inode, file_offset, &wpc->imap,
> &wpc->io_type);
> if (error)
> goto out;
> - wpc->imap_valid = xfs_imap_valid(inode, &wpc->imap,
> - file_offset);
> }
>
> - if (!wpc->imap_valid || wpc->io_type == XFS_IO_HOLE) {
> + if (wpc->io_type == XFS_IO_HOLE) {
> /*
> * set_page_dirty dirties all buffers in a page, independent
> * of their state. The dirty state however is entirely
> --
> 2.17.0
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-xfs" in
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> More majordomo info at http://vger.kernel.org/majordomo-info.html
next prev parent reply other threads:[~2018-05-30 17:44 UTC|newest]
Thread overview: 61+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-30 9:59 buffered writes without buffer heads in xfs and iomap v4 Christoph Hellwig
2018-05-30 9:59 ` [PATCH 01/18] fs: factor out a __generic_write_end helper Christoph Hellwig
2018-05-30 13:34 ` Brian Foster
2018-05-30 16:26 ` Darrick J. Wong
2018-05-30 9:59 ` [PATCH 02/18] iomap: add initial support for writes without buffer heads Christoph Hellwig
2018-05-30 13:34 ` Brian Foster
2018-05-30 16:33 ` Darrick J. Wong
2018-05-30 9:59 ` [PATCH 03/18] xfs: simplify xfs_bmap_punch_delalloc_range Christoph Hellwig
2018-05-30 13:35 ` Brian Foster
2018-05-30 16:55 ` Darrick J. Wong
2018-05-30 9:59 ` [PATCH 04/18] xfs: simplify xfs_aops_discard_page Christoph Hellwig
2018-05-30 13:35 ` Brian Foster
2018-05-30 16:40 ` Darrick J. Wong
2018-05-30 10:00 ` [PATCH 05/18] xfs: move locking into xfs_bmap_punch_delalloc_range Christoph Hellwig
2018-05-30 13:35 ` Brian Foster
2018-05-30 16:58 ` Darrick J. Wong
2018-05-30 17:40 ` Brian Foster
2018-05-30 10:00 ` [PATCH 06/18] xfs: make xfs_writepage_map extent map centric Christoph Hellwig
2018-05-30 17:19 ` Darrick J. Wong
2018-05-30 17:39 ` Brian Foster
2018-05-31 16:11 ` Christoph Hellwig
2018-05-31 16:12 ` Christoph Hellwig
2018-05-30 10:00 ` [PATCH 07/18] xfs: remove the now unused XFS_BMAPI_IGSTATE flag Christoph Hellwig
2018-05-30 17:19 ` Darrick J. Wong
2018-05-31 13:46 ` Brian Foster
2018-05-31 16:11 ` Christoph Hellwig
2018-05-30 10:00 ` [PATCH 08/18] xfs: remove xfs_reflink_find_cow_mapping Christoph Hellwig
2018-05-30 17:23 ` Darrick J. Wong
2018-05-31 13:46 ` Brian Foster
2018-05-30 10:00 ` [PATCH 09/18] xfs: remove xfs_reflink_trim_irec_to_next_cow Christoph Hellwig
2018-05-30 17:27 ` Darrick J. Wong
2018-05-31 13:46 ` Brian Foster
2018-05-30 10:00 ` [PATCH 10/18] xfs: simplify xfs_map_blocks by using xfs_iext_lookup_extent directly Christoph Hellwig
2018-05-30 17:32 ` Darrick J. Wong
2018-05-31 13:46 ` Brian Foster
2018-05-30 10:00 ` [PATCH 11/18] xfs: don't clear imap_valid for a non-uptodate buffers Christoph Hellwig
2018-05-30 17:34 ` Darrick J. Wong
2018-05-31 13:46 ` Brian Foster
2018-05-30 10:00 ` [PATCH 12/18] xfs: remove the imap_valid flag Christoph Hellwig
2018-05-30 17:44 ` Darrick J. Wong [this message]
2018-05-31 13:47 ` Brian Foster
2018-05-30 10:00 ` [PATCH 13/18] xfs: don't look at buffer heads in xfs_add_to_ioend Christoph Hellwig
2018-05-30 17:55 ` Darrick J. Wong
2018-05-31 7:03 ` Christoph Hellwig
2018-05-31 13:49 ` Brian Foster
2018-05-30 10:00 ` [PATCH 14/18] xfs: move all writeback buffer_head manipulation into xfs_map_at_offset Christoph Hellwig
2018-05-30 17:56 ` Darrick J. Wong
2018-05-31 13:49 ` Brian Foster
2018-05-30 10:00 ` [PATCH 15/18] xfs: remove xfs_start_page_writeback Christoph Hellwig
2018-05-30 17:57 ` Darrick J. Wong
2018-05-31 13:49 ` Brian Foster
2018-05-30 10:00 ` [PATCH 16/18] xfs: refactor the tail of xfs_writepage_map Christoph Hellwig
2018-05-30 18:00 ` Darrick J. Wong
2018-05-31 13:49 ` Brian Foster
2018-05-30 10:00 ` [PATCH 17/18] xfs: do not set the page uptodate in xfs_writepage_map Christoph Hellwig
2018-05-30 18:08 ` Darrick J. Wong
2018-05-31 7:04 ` Christoph Hellwig
2018-05-31 13:49 ` Brian Foster
2018-05-30 10:00 ` [PATCH 18/18] xfs: allow writeback on pages without buffer heads Christoph Hellwig
2018-05-30 18:08 ` Darrick J. Wong
2018-05-31 13:49 ` Brian Foster
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