6.10-stable review patch. If anyone has any objections, please let me know.
------------------
From: David Howells <dhowells@xxxxxxxxxx>
commit 92764e8822d4e7f8efb5ad959fac195a7f8ea0c6 upstream.
This partially reverts commit 2ff1e97587f4d398686f52c07afde3faf3da4e5c.
In addition to reverting the removal of PG_private_2 wrangling from the
buffered read code[1][2], the removal of the waits for PG_private_2 from
netfs_release_folio() and netfs_invalidate_folio() need reverting too.
It also adds a wait into ceph_evict_inode() to wait for netfs read and
copy-to-cache ops to complete.
Fixes: 2ff1e97587f4 ("netfs: Replace PG_fscache by setting folio->private and marking dirty")
Signed-off-by: David Howells <dhowells@xxxxxxxxxx>
Link: https://lore.kernel.org/r/3575457.1722355300@xxxxxxxxxxxxxxxxxxxxxx [1]
Link: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8e5ced7804cb9184c4a23f8054551240562a8eda [2]
Link: https://lore.kernel.org/r/20240814203850.2240469-2-dhowells@xxxxxxxxxx
cc: Max Kellermann <max.kellermann@xxxxxxxxx>
cc: Ilya Dryomov <idryomov@xxxxxxxxx>
cc: Xiubo Li <xiubli@xxxxxxxxxx>
cc: Jeff Layton <jlayton@xxxxxxxxxx>
cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
cc: ceph-devel@xxxxxxxxxxxxxxx
cc: netfs@xxxxxxxxxxxxxxx
cc: linux-fsdevel@xxxxxxxxxxxxxxx
cc: linux-mm@xxxxxxxxx
Signed-off-by: Christian Brauner <brauner@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/ceph/inode.c | 1 +
fs/netfs/misc.c | 7 +++++++
2 files changed, 8 insertions(+)
--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -697,6 +697,7 @@ void ceph_evict_inode(struct inode *inod
percpu_counter_dec(&mdsc->metric.total_inodes);
+ netfs_wait_for_outstanding_io(inode);
truncate_inode_pages_final(&inode->i_data);
if (inode->i_state & I_PINNING_NETFS_WB)
ceph_fscache_unuse_cookie(inode, true);
--- a/fs/netfs/misc.c
+++ b/fs/netfs/misc.c
@@ -101,6 +101,8 @@ void netfs_invalidate_folio(struct folio
kenter("{%lx},%zx,%zx", folio->index, offset, length);
+ folio_wait_private_2(folio); /* [DEPRECATED] */
+
if (!folio_test_private(folio))
return;
@@ -165,6 +167,11 @@ bool netfs_release_folio(struct folio *f
if (folio_test_private(folio))
return false;
+ if (unlikely(folio_test_private_2(folio))) { /* [DEPRECATED] */
+ if (current_is_kswapd() || !(gfp & __GFP_FS))
+ return false;
+ folio_wait_private_2(folio);
+ }
fscache_note_page_release(netfs_i_cookie(ctx));
return true;
}
