Commit 1d445757 authored by Jens Axboe's avatar Jens Axboe Committed by Andrew Morton
Browse files

mm: call filemap_fdatawrite_range_kick() after IOCB_DONTCACHE issue 

When a buffered write submitted with IOCB_DONTCACHE has been successfully
submitted, call filemap_fdatawrite_range_kick() to kick off the IO.  File
systems call generic_write_sync() for any successful buffered write
submission, hence add the logic here rather than needing to modify the
file system.

Link: https://lkml.kernel.org/r/20241220154831.1086649-12-axboe@kernel.dk


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
Cc: Brian Foster <bfoster@redhat.com>
Cc: Chris Mason <clm@meta.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent dddc559f

include/linux/fs.h

+5 −0
Original line number Diff line number Diff line
@@ -2912,6 +2912,11 @@ static inline ssize_t generic_write_sync(struct kiocb *iocb, ssize_t count) 
				(iocb->ki_flags & IOCB_SYNC) ? 0 : 1);

		if (ret)

			return ret;

	} else if (iocb->ki_flags & IOCB_DONTCACHE) {

		struct address_space *mapping = iocb->ki_filp->f_mapping;



		filemap_fdatawrite_range_kick(mapping, iocb->ki_pos,

					      iocb->ki_pos + count);

	}



	return count;