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netfs: Fault in smaller chunks for non-large folio mappings

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BugLink: https://bugs.launchpad.net/bugs/2084005

[ 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: c38f4e96e6 ("netfs: Provide func to copy data to pagecache for buffered write")
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Link: https://lore.kernel.org/r/20240527201735.1898381-1-willy@infradead.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Koichiro Den <koichiro.den@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
This commit is contained in:
Matthew Wilcox (Oracle)
2024-05-27 21:17:32 +01:00
committed by Mehmet Basaran
parent baaf20c69a
commit 26b76e631d
1 changed files with 1 additions and 1 deletions
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fs/netfs/buffered_write.c
+1 -1
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@@ -166,7 +166,7 @@ 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) ||