diff options
| author | Ritesh Harjani (IBM) <ritesh.list@gmail.com> | 2023-07-10 14:12:43 -0700 |
|---|---|---|
| committer | Ritesh Harjani (IBM) <ritesh.list@gmail.com> | 2023-07-25 10:55:56 +0530 |
| commit | 4ce02c67972211be488408c275c8fbf19faf29b3 (patch) | |
| tree | 976b4a0fa2e9d6f6dd88a2a25567f5d52c5ff2ff /fs/gfs2 | |
| parent | a01b8f225248e86f3328a48c3311882148a8c5d3 (diff) | |
| download | linux-4ce02c67972211be488408c275c8fbf19faf29b3.tar.gz | |
iomap: Add per-block dirty state tracking to improve performance
When filesystem blocksize is less than folio size (either with
mapping_large_folio_support() or with blocksize < pagesize) and when the
folio is uptodate in pagecache, then even a byte write can cause
an entire folio to be written to disk during writeback. This happens
because we currently don't have a mechanism to track per-block dirty
state within struct iomap_folio_state. We currently only track uptodate
state.
This patch implements support for tracking per-block dirty state in
iomap_folio_state->state bitmap. This should help improve the filesystem
write performance and help reduce write amplification.
Performance testing of below fio workload reveals ~16x performance
improvement using nvme with XFS (4k blocksize) on Power (64K pagesize)
FIO reported write bw scores improved from around ~28 MBps to ~452 MBps.
1. <test_randwrite.fio>
[global]
ioengine=psync
rw=randwrite
overwrite=1
pre_read=1
direct=0
bs=4k
size=1G
dir=./
numjobs=8
fdatasync=1
runtime=60
iodepth=64
group_reporting=1
[fio-run]
2. Also our internal performance team reported that this patch improves
their database workload performance by around ~83% (with XFS on Power)
Reported-by: Aravinda Herle <araherle@in.ibm.com>
Reported-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Diffstat (limited to 'fs/gfs2')
| -rw-r--r-- | fs/gfs2/aops.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/gfs2/aops.c b/fs/gfs2/aops.c index ae49256b7c8c6..9c4b26aec5803 100644 --- a/fs/gfs2/aops.c +++ b/fs/gfs2/aops.c @@ -747,7 +747,7 @@ static const struct address_space_operations gfs2_aops = { .writepages = gfs2_writepages, .read_folio = gfs2_read_folio, .readahead = gfs2_readahead, - .dirty_folio = filemap_dirty_folio, + .dirty_folio = iomap_dirty_folio, .release_folio = iomap_release_folio, .invalidate_folio = iomap_invalidate_folio, .bmap = gfs2_bmap, |