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xfs: use iomap for blocksize == PAGE_SIZE readpage and readpages 

For file systems with a block size that equals the page size we never do
partial reads, so we can use the buffer_head-less iomap versions of
readpage and readpages without conflicting with the buffer_head structures
create later in write_begin.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
This commit is contained in:
Christoph Hellwig 2018-07-11 22:25:56 -07:00 committed by Darrick J. Wong
parent c2efdfc100
commit 8b2e77c163
1 changed files with 4 additions and 0 deletions
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4
fs/xfs/xfs_aops.c
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@ -1401,6 +1401,8 @@ xfs_vm_readpage(
struct page *page)
{
trace_xfs_vm_readpage(page->mapping->host, 1);
if (i_blocksize(page->mapping->host) == PAGE_SIZE)
return iomap_readpage(page, &xfs_iomap_ops);
return mpage_readpage(page, xfs_get_blocks);
}
@ -1412,6 +1414,8 @@ xfs_vm_readpages(
unsigned nr_pages)
{
trace_xfs_vm_readpages(mapping->host, nr_pages);
if (i_blocksize(mapping->host) == PAGE_SIZE)
return iomap_readpages(mapping, pages, nr_pages, &xfs_iomap_ops);
return mpage_readpages(mapping, pages, nr_pages, xfs_get_blocks);
}