Kernel Summit 2014 had a topic on performance regressions and catching
them. The situation relatively recently has been good but I believe this
is partially due to major distributions stabilising recently and hardware
vendors working on performance for their latest platforms. On thing I fear is
that we miss performance regressions because releases contains performance
gains and losses, some of which balance out. After a number of mainline
releases, the performance may look ok but in comparison to a distribution
kernel cherry-picking the picture is not as rosy. The 3.0-longterm
included a number of performance-related patches so it could be used as
a good performance baseline for later releases. It is no longer maintained.
This series contains a large number of patches against 3.12-longterm that
never made it to stable as the bugs were not serious enough or they were
performance patches. 3.10-longterm may need other pre-requisites I did
not research and 3.14-longterm should be able to apply a subset although
I have not tested the result.
The first 12 patches are mostly functional patches. After that is mostly but
not exclusively performance-related patches. Sometimes there are patches
that are clean-ups so that later patches do not have to be extensively
modified for the backport.
I'm aware that this series is outside the standard rules for stable.
Even the stable rules for performance patches is being violated here as
I do not added information to the changelog on user-visible effects or
bugzilla entries beyond what is already available as the information was
not recorded when these patches were identified. By the nature of many of
the patches they do include performance data though. It's up to the -stable
maintainers for each longterm kernel if they want to use the kernel they
maintain as a performance baseline or not.
Al Viro (1):
callers of iov_copy_from_user_atomic() don't need pagecache_disable()
Bob Liu (2):
mm: thp: cleanup: mv alloc_hugepage to better place
mm: thp: khugepaged: add policy for finding target node
Christoph Lameter (1):
vmscan: reclaim_clean_pages_from_list() must use mod_zone_page_state()
Damien Ramonda (1):
readahead: fix sequential read cache miss detection
Dan Streetman (4):
swap: change swap_info singly-linked list to list_head
lib/plist: add helper functions
lib/plist: add plist_requeue
swap: change swap_list_head to plist, add swap_avail_head
Dave Chinner (1):
fs/superblock: unregister sb shrinker before ->kill_sb()
David Rientjes (10):
mm, thp: do not allow thp faults to avoid cpuset restrictions
mm, compaction: avoid isolating pinned pages
mm, compaction: determine isolation mode only once
mm, compaction: ignore pageblock skip when manually invoking
compaction
mm, migration: add destination page freeing callback
mm, compaction: return failed migration target pages back to freelist
mm, compaction: add per-zone migration pfn cache for async compaction
mm, compaction: embed migration mode in compact_control
mm, compaction: terminate async compaction when rescheduling
mm, thp: only collapse hugepages to nodes with affinity for
zone_reclaim_mode
Davidlohr Bueso (1):
mm: per-thread vma caching
Fabian Frederick (1):
mm/readahead.c: inline ra_submit
Han Pingtian (1):
mm: prevent setting of a value less than 0 to min_free_kbytes
Heesub Shin (1):
mm/compaction: clean up unused code lines
Hugh Dickins (4):
mm: fix bad rss-counter if remap_file_pages raced migration
mm: fix direct reclaim writeback regression
shmem: fix init_page_accessed use to stop !PageLRU bug
mm/memory.c: use entry = ACCESS_ONCE(*pte) in handle_pte_fault()
Jens Axboe (1):
mm/filemap.c: avoid always dirtying mapping->flags on O_DIRECT
Jerome Marchand (2):
mm: make copy_pte_range static again
memcg, vmscan: Fix forced scan of anonymous pages
Jianyu Zhan (1):
mm/swap.c: clean up *lru_cache_add* functions
Johannes Weiner (5):
lib: radix-tree: add radix_tree_delete_item()
mm: shmem: save one radix tree lookup when truncating swapped pages
mm: filemap: move radix tree hole searching here
mm + fs: prepare for non-page entries in page cache radix trees
mm: madvise: fix MADV_WILLNEED on shmem swapouts
Joonsoo Kim (7):
slab: correct pfmemalloc check
mm/compaction: disallow high-order page for migration target
mm/compaction: do not call suitable_migration_target() on every page
mm/compaction: change the timing to check to drop the spinlock
mm/compaction: check pageblock suitability once per pageblock
mm/compaction: clean-up code on success of ballon isolation
vmalloc: use rcu list iterator to reduce vmap_area_lock contention
KOSAKI Motohiro (2):
mm: get rid of unnecessary overhead of trace_mm_page_alloc_extfrag()
mm: __rmqueue_fallback() should respect pageblock type
Linus Torvalds (1):
mm: don't pointlessly use BUG_ON() for sanity check
Mel Gorman (30):
mm, x86: Account for TLB flushes only when debugging
x86/mm: Clean up inconsistencies when flushing TLB ranges
x86/mm: Eliminate redundant page table walk during TLB range flushing
mm: compaction: trace compaction begin and end
mm: optimize put_mems_allowed() usage
mm: vmscan: use proportional scanning during direct reclaim and full
scan at DEF_PRIORITY
mm: page_alloc: do not update zlc unless the zlc is active
mm: page_alloc: do not treat a zone that cannot be used for dirty
pages as "full"
include/linux/jump_label.h: expose the reference count
mm: page_alloc: use jump labels to avoid checking number_of_cpusets
mm: page_alloc: calculate classzone_idx once from the zonelist ref
mm: page_alloc: only check the zone id check if pages are buddies
mm: page_alloc: only check the alloc flags and gfp_mask for dirty once
mm: page_alloc: take the ALLOC_NO_WATERMARK check out of the fast path
mm: page_alloc: use unsigned int for order in more places
mm: page_alloc: reduce number of times page_to_pfn is called
mm: page_alloc: convert hot/cold parameter and immediate callers to
bool
mm: page_alloc: lookup pageblock migratetype with IRQs enabled during
free
mm: shmem: avoid atomic operation during shmem_getpage_gfp
mm: do not use atomic operations when releasing pages
mm: do not use unnecessary atomic operations when adding pages to the
LRU
fs: buffer: do not use unnecessary atomic operations when discarding
buffers
mm: non-atomically mark page accessed during page cache allocation
where possible
mm: avoid unnecessary atomic operations during end_page_writeback()
mm: pagemap: avoid unnecessary overhead when tracepoints are
deactivated
mm: rearrange zone fields into read-only, page alloc, statistics and
page reclaim lines
mm: move zone->pages_scanned into a vmstat counter
mm: vmscan: only update per-cpu thresholds for online CPU
mm: page_alloc: abort fair zone allocation policy when remotes nodes
are encountered
mm: page_alloc: reduce cost of the fair zone allocation policy
Michal Hocko (1):
mm: exclude memoryless nodes from zone_reclaim
Nishanth Aravamudan (1):
hugetlb: ensure hugepage access is denied if hugepages are not
supported
Raghavendra K T (1):
mm/readahead.c: fix readahead failure for memoryless NUMA nodes and
limit readahead pages
Sasha Levin (1):
mm: remove read_cache_page_async()
Shaohua Li (2):
swap: add a simple detector for inappropriate swapin readahead
x86/mm: In the PTE swapout page reclaim case clear the accessed bit
instead of flushing the TLB
Tim Chen (1):
fs/superblock: avoid locking counting inodes and dentries before
reclaiming them
Vladimir Davydov (4):
mm: vmscan: shrink all slab objects if tight on memory
mm: vmscan: call NUMA-unaware shrinkers irrespective of nodemask
mm: vmscan: respect NUMA policy mask when shrinking slab on direct
reclaim
mm: vmscan: shrink_slab: rename max_pass -> freeable
Vlastimil Babka (8):
mm: compaction: encapsulate defer reset logic
mm: compaction: do not mark unmovable pageblocks as skipped in async
compaction
mm: compaction: reset scanner positions immediately when they meet
mm/compaction: cleanup isolate_freepages()
mm/compaction: do not count migratepages when unnecessary
mm/compaction: avoid rescanning pageblocks in isolate_freepages
mm, compaction: properly signal and act upon lock and need_sched()
contention
mm/page_alloc: prevent MIGRATE_RESERVE pages from being misplaced
Yasuaki Ishimatsu (1):
mm: get rid of unnecessary pageblock scanning in
setup_zone_migrate_reserve
arch/tile/mm/homecache.c | 2 +-
arch/unicore32/include/asm/mmu_context.h | 4 +-
arch/x86/include/asm/tlbflush.h | 6 +-
arch/x86/kernel/cpu/mtrr/generic.c | 4 +-
arch/x86/mm/pgtable.c | 21 +-
arch/x86/mm/tlb.c | 52 +---
fs/btrfs/compression.c | 2 +-
fs/btrfs/extent_io.c | 15 +-
fs/btrfs/file.c | 10 +-
fs/buffer.c | 28 +-
fs/cramfs/inode.c | 3 +-
fs/exec.c | 5 +-
fs/ext4/mballoc.c | 14 +-
fs/f2fs/checkpoint.c | 1 -
fs/f2fs/node.c | 2 -
fs/fuse/dev.c | 2 +-
fs/fuse/file.c | 4 -
fs/gfs2/aops.c | 1 -
fs/gfs2/meta_io.c | 4 +-
fs/hugetlbfs/inode.c | 5 +
fs/jffs2/fs.c | 2 +-
fs/nfs/blocklayout/blocklayout.c | 2 +-
fs/ntfs/attrib.c | 1 -
fs/ntfs/file.c | 1 -
fs/proc/task_mmu.c | 3 +-
fs/super.c | 16 +-
include/linux/compaction.h | 20 +-
include/linux/cpuset.h | 56 ++--
include/linux/gfp.h | 4 +-
include/linux/huge_mm.h | 4 -
include/linux/hugetlb.h | 10 +
include/linux/jump_label.h | 20 +-
include/linux/migrate.h | 11 +-
include/linux/mm.h | 11 +-
include/linux/mm_types.h | 4 +-
include/linux/mmzone.h | 233 ++++++++-------
include/linux/page-flags.h | 6 +-
include/linux/pageblock-flags.h | 33 +--
include/linux/pagemap.h | 131 +++++++--
include/linux/pagevec.h | 5 +
include/linux/plist.h | 45 +++
include/linux/radix-tree.h | 5 +-
include/linux/sched.h | 7 +
include/linux/shmem_fs.h | 1 +
include/linux/swap.h | 30 +-
include/linux/swapfile.h | 2 +-
include/linux/vm_event_item.h | 4 +-
include/linux/vmacache.h | 38 +++
include/linux/vmstat.h | 8 +
include/trace/events/compaction.h | 67 ++++-
include/trace/events/kmem.h | 10 +-
include/trace/events/pagemap.h | 16 +-
kernel/cpuset.c | 16 +-
kernel/debug/debug_core.c | 14 +-
kernel/fork.c | 7 +-
lib/plist.c | 52 ++++
lib/radix-tree.c | 106 ++-----
mm/Makefile | 2 +-
mm/compaction.c | 347 +++++++++++++----------
mm/filemap.c | 470 +++++++++++++++++++++----------
mm/fremap.c | 28 +-
mm/frontswap.c | 13 +-
mm/huge_memory.c | 93 ++++--
mm/hugetlb.c | 17 +-
mm/internal.h | 22 +-
mm/madvise.c | 2 +-
mm/memory-failure.c | 4 +-
mm/memory.c | 4 +-
mm/memory_hotplug.c | 2 +-
mm/mempolicy.c | 16 +-
mm/migrate.c | 56 ++--
mm/mincore.c | 20 +-
mm/mmap.c | 55 ++--
mm/nommu.c | 24 +-
mm/page_alloc.c | 439 ++++++++++++++++-------------
mm/readahead.c | 37 +--
mm/shmem.c | 133 +++------
mm/slab.c | 12 +-
mm/slub.c | 16 +-
mm/swap.c | 101 ++++++-
mm/swap_state.c | 65 ++++-
mm/swapfile.c | 224 ++++++++-------
mm/truncate.c | 74 ++++-
mm/vmacache.c | 114 ++++++++
mm/vmalloc.c | 6 +-
mm/vmscan.c | 144 ++++++----
mm/vmstat.c | 13 +-
87 files changed, 2374 insertions(+), 1365 deletions(-)
create mode 100644 include/linux/vmacache.h
create mode 100644 mm/vmacache.c
--
1.8.4.5
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