This is a note to let you know that I've just added the patch titled
netfs: Fault in smaller chunks for non-large folio mappings
to the 6.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
netfs-fault-in-smaller-chunks-for-non-large-folio-ma.patch
and it can be found in the queue-6.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 869cd1bcb096701f0ecc97176c6556b50e2dd17f
Author: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Date: Mon May 27 21:17:32 2024 +0100
netfs: Fault in smaller chunks for non-large folio mappings
[ Upstream commit 98055bc3595500bcf2126b93b1595354bdb86a66 ]
As in commit 4e527d5841e2 ("iomap: fault in smaller chunks for non-large
folio mappings"), we can see a performance loss for filesystems
which have not yet been converted to large folios.
Fixes: c38f4e96e605 ("netfs: Provide func to copy data to pagecache for buffered write")
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20240527201735.1898381-1-willy@xxxxxxxxxxxxx
Reviewed-by: Jeff Layton <jlayton@xxxxxxxxxx>
Signed-off-by: Christian Brauner <brauner@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/fs/netfs/buffered_write.c b/fs/netfs/buffered_write.c
index ecbc99ec7d367..18055c1e01835 100644
--- a/fs/netfs/buffered_write.c
+++ b/fs/netfs/buffered_write.c
@@ -184,7 +184,7 @@ ssize_t netfs_perform_write(struct kiocb *iocb, struct iov_iter *iter,
unsigned int bdp_flags = (iocb->ki_flags & IOCB_NOWAIT) ? BDP_ASYNC : 0;
ssize_t written = 0, ret, ret2;
loff_t i_size, pos = iocb->ki_pos, from, to;
- size_t max_chunk = PAGE_SIZE << MAX_PAGECACHE_ORDER;
+ size_t max_chunk = mapping_max_folio_size(mapping);
bool maybe_trouble = false;
if (unlikely(test_bit(NETFS_ICTX_WRITETHROUGH, &ctx->flags) ||
