From: Matthew Wilcox (Oracle) Date: Mon, 27 May 2024 20:17:32 +0000 (+0100) Subject: netfs: Fault in smaller chunks for non-large folio mappings X-Git-Tag: v6.10.7~195 X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=2b97d4573d27986db8b580c793165a347f908b87;p=thirdparty%2Fkernel%2Fstable.git 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) Link: https://lore.kernel.org/r/20240527201735.1898381-1-willy@infradead.org Reviewed-by: Jeff Layton Signed-off-by: Christian Brauner Signed-off-by: Sasha Levin --- 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) ||