The patch titled
Subject: mm: call filemap_fdatawrite_range_kick() after IOCB_DONTCACHE issue
has been added to the -mm mm-unstable branch. Its filename is
mm-call-filemap_fdatawrite_range_kick-after-iocb_dontcache-issue.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-call-filemap_fdatawrite_range_kick-after-iocb_dontcache-issue.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Jens Axboe <axboe@xxxxxxxxx>
Subject: mm: call filemap_fdatawrite_range_kick() after IOCB_DONTCACHE issue
Date: Fri, 20 Dec 2024 08:47:49 -0700
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@xxxxxxxxx
Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
Cc: Brian Foster <bfoster@xxxxxxxxxx>
Cc: Chris Mason <clm@xxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Cc: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/fs.h | 5 +++++
1 file changed, 5 insertions(+)
--- a/include/linux/fs.h~mm-call-filemap_fdatawrite_range_kick-after-iocb_dontcache-issue
+++ a/include/linux/fs.h
@@ -2912,6 +2912,11 @@ static inline ssize_t generic_write_sync
(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;
_
Patches currently in -mm which might be from axboe@xxxxxxxxx are
mm-filemap-change-filemap_create_folio-to-take-a-struct-kiocb.patch
mm-filemap-use-page_cache_sync_ra-to-kick-off-read-ahead.patch
mm-readahead-add-folio-allocation-helper.patch
mm-add-pg_dropbehind-folio-flag.patch
mm-readahead-add-readahead_control-dropbehind-member.patch
mm-truncate-add-folio_unmap_invalidate-helper.patch
fs-add-rwf_dontcache-iocb-and-fop_dontcache-file_operations-flag.patch
mm-filemap-add-read-support-for-rwf_dontcache.patch
mm-filemap-drop-streaming-uncached-pages-when-writeback-completes.patch
mm-filemap-add-filemap_fdatawrite_range_kick-helper.patch
mm-call-filemap_fdatawrite_range_kick-after-iocb_dontcache-issue.patch
mm-add-fgp_dontcache-folio-creation-flag.patch
