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gfs2: use iomap_readpage for blocksize == PAGE_SIZE 

We only use iomap_readpage for pages that don't have buffer heads
attached yet: iomap_readpage would otherwise read pages from disk that
are marked buffer_uptodate() but not PageUptodate().  Those pages may
actually contain data more recent than what's on disk.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Reviewed-by: Bob Peterson <rpeterso@redhat.com>
This commit is contained in:
Andreas Gruenbacher 2018-06-06 20:30:38 +01:00
parent 1d45bb7f9d
commit f95cbb44ab
1 changed files with 5 additions and 1 deletions
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6
fs/gfs2/aops.c
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@ -508,9 +508,13 @@ static int __gfs2_readpage(void *file, struct page *page)
{
struct gfs2_inode *ip = GFS2_I(page->mapping->host);
struct gfs2_sbd *sdp = GFS2_SB(page->mapping->host);
int error;
if (gfs2_is_stuffed(ip)) {
if (i_blocksize(page->mapping->host) == PAGE_SIZE &&
!page_has_buffers(page)) {
error = iomap_readpage(page, &gfs2_iomap_ops);
} else if (gfs2_is_stuffed(ip)) {
error = stuffed_readpage(ip, page);
unlock_page(page);
} else {