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authorAndreas Gruenbacher <agruenba@redhat.com>2021-07-15 09:58:05 -0700
committerDarrick J. Wong <djwong@kernel.org>2021-07-15 09:58:05 -0700
commit8e1bcef8e18d0fec4afe527c074bb1fd6c2b140c (patch)
tree83c3ee2f8d5ecaaed909a35a2adff451d7adf5bc /fs
parent49694d14ff68fa4b5f86019dbcfb44a8bd213e58 (diff)
downloadlinux-8e1bcef8e18d0fec4afe527c074bb1fd6c2b140c.tar.bz2
iomap: Permit pages without an iop to enter writeback
Create an iop in the writeback path if one doesn't exist. This allows us to avoid creating the iop in some cases. We'll initially do that for pages with inline data, but it can be extended to pages which are entirely within an extent. It also allows for an iop to be removed from pages in the future (eg page split). Co-developed-by: Matthew Wilcox (Oracle) <willy@infradead.org> Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <djwong@kernel.org> Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Diffstat (limited to 'fs')
-rw-r--r--fs/iomap/buffered-io.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c
index 41da4f14c00b..ad976634d56b 100644
--- a/fs/iomap/buffered-io.c
+++ b/fs/iomap/buffered-io.c
@@ -1304,14 +1304,13 @@ iomap_writepage_map(struct iomap_writepage_ctx *wpc,
struct writeback_control *wbc, struct inode *inode,
struct page *page, u64 end_offset)
{
- struct iomap_page *iop = to_iomap_page(page);
+ struct iomap_page *iop = iomap_page_create(inode, page);
struct iomap_ioend *ioend, *next;
unsigned len = i_blocksize(inode);
u64 file_offset; /* file offset of page */
int error = 0, count = 0, i;
LIST_HEAD(submit_list);
- WARN_ON_ONCE(i_blocks_per_page(inode, page) > 1 && !iop);
WARN_ON_ONCE(iop && atomic_read(&iop->write_bytes_pending) != 0);
/*