The following changes since commit a44a027a8b2a20fec30e0e9c99b0eb41c03e7420:
Merge tag 'large-extent-counters-v9' of https://github.com/chandanr/linux into xfs-5.19-for-next (2022-04-21 16:46:17 +1000)
are available in the Git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux.git tags/rmap-speedups-5.19_2022-04-28
for you to fetch changes up to 1edf8056131aca6fe7f98873da8297e6fa279d8c:
xfs: speed up write operations by using non-overlapped lookups when possible (2022-04-28 10:24:38 -0700)
----------------------------------------------------------------
xfs: fix rmap inefficiencies
Reduce the performance impact of the reverse mapping btree when reflink
is enabled by using the much faster non-overlapped btree lookup
functions when we're searching the rmap index with a fully specified
key. If we find the exact record we're looking for, great! We don't
have to perform the full overlapped scan. For filesystems with high
sharing factors this reduces the xfs_scrub runtime by a good 15%%.
This has been shown to reduce the fstests runtime for realtime rmap
configurations by 30%%, since the lack of AGs severely limits
scalability.
v2: simplify the non-overlapped lookup code per dave comments
----------------------------------------------------------------
Darrick J. Wong (4):
xfs: capture buffer ops in the xfs_buf tracepoints
xfs: simplify xfs_rmap_lookup_le call sites
xfs: speed up rmap lookups by using non-overlapped lookups when possible
xfs: speed up write operations by using non-overlapped lookups when possible
fs/xfs/libxfs/xfs_rmap.c | 161 ++++++++++++++++++++++++++++-------------------
fs/xfs/libxfs/xfs_rmap.h | 7 +--
fs/xfs/scrub/bmap.c | 24 ++-----
fs/xfs/xfs_trace.h | 5 +-
4 files changed, 106 insertions(+), 91 deletions(-)
The following changes since commit a44a027a8b2a20fec30e0e9c99b0eb41c03e7420: Merge tag 'large-extent-counters-v9' of https://github.com/chandanr/linux into xfs-5.19-for-next (2022-04-21 16:46:17 +1000) are available in the Git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux.git tags/rmap-speedups-5.19_2022-04-28 for you to fetch changes up to 1edf8056131aca6fe7f98873da8297e6fa279d8c: xfs: speed up write operations by using non-overlapped lookups when possible (2022-04-28 10:24:38 -0700) ---------------------------------------------------------------- xfs: fix rmap inefficiencies Reduce the performance impact of the reverse mapping btree when reflink is enabled by using the much faster non-overlapped btree lookup functions when we're searching the rmap index with a fully specified key. If we find the exact record we're looking for, great! We don't have to perform the full overlapped scan. For filesystems with high sharing factors this reduces the xfs_scrub runtime by a good 15%%. This has been shown to reduce the fstests runtime for realtime rmap configurations by 30%%, since the lack of AGs severely limits scalability. v2: simplify the non-overlapped lookup code per dave comments ---------------------------------------------------------------- Darrick J. Wong (4): xfs: capture buffer ops in the xfs_buf tracepoints xfs: simplify xfs_rmap_lookup_le call sites xfs: speed up rmap lookups by using non-overlapped lookups when possible xfs: speed up write operations by using non-overlapped lookups when possible fs/xfs/libxfs/xfs_rmap.c | 161 ++++++++++++++++++++++++++++------------------- fs/xfs/libxfs/xfs_rmap.h | 7 +-- fs/xfs/scrub/bmap.c | 24 ++----- fs/xfs/xfs_trace.h | 5 +- 4 files changed, 106 insertions(+), 91 deletions(-)