[RFC,2/6] ceph: rework PageFsCache handling
diff mbox series

Message ID 20210122175119.364381-3-jlayton@kernel.org
State New, archived
Headers show
Series
  • ceph: convert buffered read codepaths to new netfs API
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Commit Message

Jeff Layton Jan. 22, 2021, 5:51 p.m. UTC
With the new fscache API, the PageFsCache bit now indicates that the
page is being written to the cache and shouldn't be modified or released
until it's finished.

Change releasepage and invalidatepage to wait on that bit before
returning.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
---
 fs/ceph/addr.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

Patch
diff mbox series

diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c
index e267aa60c8b6..f554667e1e91 100644
--- a/fs/ceph/addr.c
+++ b/fs/ceph/addr.c
@@ -166,13 +166,19 @@  static void ceph_invalidatepage(struct page *page, unsigned int offset,
 	ceph_put_snap_context(snapc);
 	page->private = 0;
 	ClearPagePrivate(page);
+	wait_on_page_fscache(page);
 }
 
-static int ceph_releasepage(struct page *page, gfp_t g)
+static int ceph_releasepage(struct page *page, gfp_t gfp_flags)
 {
 	dout("%p releasepage %p idx %lu (%sdirty)\n", page->mapping->host,
 	     page, page->index, PageDirty(page) ? "" : "not ");
 
+	if (PageFsCache(page)) {
+		if (!(gfp_flags & __GFP_DIRECT_RECLAIM) || !(gfp_flags & __GFP_FS))
+			return 0;
+		wait_on_page_fscache(page);
+	}
 	return !PagePrivate(page);
 }