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Subject2.5.43-mm2

url: http://www.zip.com.au/~akpm/linux/patches/2.5/2.5.43/2.5.43-mm2/


. I've pretty much dropped the per-cpu pages patches which Martin and
I developed.

These patches gave a 1-2% benefit in kernel compiles, up to 4% in
Randy Hron's testing of the autoconf build tests. 2.2% in specweb.
And a 60% speedup in a little app which just looped writing 80k to a
file and truncating it off again.

All the above came from the cache-warmth effect. The patches would
give an overall 15% speedup due to reduced lock contention in Anton's
testing on the big PPC64 machines, but he fixed that anyway by
getting NUMA working properly.

In my opinion, all the above is just too thin to justify throwing a
bunch of new stuff into the page allocator.

I shall continue to distribute these patches. Maybe someone will
find them sufficiently beneficial for something at a future time.

But it simply seems to be the case that no interesting workloads
repeatedly allocate and free small numbers of pages (in the 10-50
range).

. The shared pagetable code is not in the main diff - it has a few
problems at present. The patches are over in the experimental/
directory. order of application is:

shpte.patch
shpte-lock-ranking-fix.patch
shmmap.patch
handle-mm-fault-locking.patch
mremap-shared-pagetable-fix.patch
shpte-unmap_all_pages_fix.patch
unmap_page_range-fix.patch

. The slab rework is stable now and Manfred has some good
microbenchmark numbers from that. But we're still not quite ready
with that code because the hotplug CPU APIs have, shall we say, a few
shortcomings.


Since 2.5.43-mm1:

-disable-ppc-lbd.patch
-fs-inlines.patch
-md-fix.patch
-mpparse-fix.patch
-no-reclaim-throttle.patch
-refill-inactive-lockup-fix.patch
-reiserfs-kmap-fix.patch
-simple_rename-link-count.patch
-static-filemap_sync.patch
-uninline-highmem.patch
-vmalloc-overalloc.patch

Merged

-meminfo-numa.patch

Dropped. To be moved from procfs into the NUMA preentation in
driverfs.

+3c59x-udp-csum.patch

Make the 3c59x driver work with UDP in Linus's current tree

+dmi-warning.patch
+ide-warnings.patch

Stomp some compilation warnings

+dhowells-readahead.patch
+file_ra_state_init.patch

Expose some finer-grained readahead facilities.

+less-unlikelies.patch

Less buslocked traffic in the page allocator

+running-iowait.patch

Expose nr_running and nr_iowait task counts in /proc

+uaccess-uninline.patch

Uninline the ia32 copy_*_user functions. (Now showing a 33kbyte
shrink from this work)

+slab-cleanup.patch

Less typedefs and macros in slab.c

+mm1-incr1.patch
+mm1-incr2.patch

POSIX ACL and EA updates



All patches:


linus.patch
cset-1.781.24.13-to-1.793.txt.gz

3c59x-udp-csum.patch
Enable UDP checksums in 3c59x

ide-warnings.patch
Fix some IDE compile warnings

dmi-warning.patch
fix a compile warning in dmi_scan.c

kgdb.patch

ramfs-aops.patch
Move ramfs address_space ops into libfs

ramfs-prepare-write-speedup.patch
correctness fixes in libfs address_space ops

dio-fine-alignment.patch
Allow O_DIRECT to use 512-byte alignment

dhowells-readahead.patch
readahead generalisations

file_ra_state_init.patch
Add a function to initialise file readahead state

less-unlikelies.patch
reduced buslocked traffic in the page allocator

running-iowait.patch
expose nr_running and nr_iowait task counts in /proc

intel-user-copy-taka.patch
Faster copy_*_user for Intel ia32 CPUs

uaccess-uninline.patch

ingo-oom-kill.patch
oom-killer changes for threaded apps

add_timer_on.patch
add_timer_on(): function to start a timer on a particular CPU

slab-split-01-rename.patch
slab cleanup: rename static functions

slab-split-02-SMP.patch
slab: enable the cpu arrays on uniprocessor

slab-split-03-tail.patch
slab: reduced internal fragmentation

slab-split-04-drain.patch
slab: take the spinlock in the drain function.

slab-split-05-name.patch
slab: remove spaces from /proc identifiers

slab-split-06-mand-cpuarray.patch
slab: cleanups and speedups

slab-split-07-inline.patch
slab: uninline poisoning checks

slab-split-08-reap.patch
slab: reap timers

slab-timer.patch

slab-use-sem.patch

slab-cleanup.patch
Slab cleanup

ingo-mmap-speedup.patch
Ingo's mmap speedup

mm-inlines.patch
remove some inlines from mm/*

o_streaming.patch
O_STREAMING support

page_reserved-accounting.patch
Global PageReserved accounting

use-page_reserved_accounting.patch
Use PG_reserved accounting in the VM

mod_timer-race.patch

net-loopback.patch
Disable second copy in the network loopback driver

blkdev-o_direct-short-read.patch
Fix O_DIRECT blockdev reads at end-of-device

orlov-allocator.patch

blk-queue-bounce.patch
inline blk_queue_bounce

lseek-ext2_readdir.patch
remove lock_kernel() from ext2_readdir()

write-deadlock.patch
Fix the generic_file_write-from-same-mmapped-page deadlock

rd-cleanup.patch
Cleanup and fix the ramdisk driver (doesn't work right yet)

spin-lock-check.patch
spinlock/rwlock checking infrastructure

hugetlb-prefault.patch
hugetlbpages: factor out some code for hugetlbfs

hugetlb-header-split.patch
Move hugetlb declarations into their own header

hugetlbfs.patch
hugetlbfs file system

hugetlb-shm.patch
hugetlbfs backing for SYSV shared memory

truncate-bkl.patch
don't take the BKL in inode_setattr

akpm-deadline.patch
deadline scheduler tweaks

xattr-01-metablock-cache.patch
EA: meta block cache

xattr-02-ext3.patch
EA: ext3 support

xattr-03-ext2.patch
EA: ext2 support

fix-xattr.patch
EA: compile warning fix

posix-acl-01-core.patch
posixacl: core support

posix-acl-02-umask.patch
posixacl: umask support

posix-acl-03-user-api.patch
posixacl: user API

posix-acl-04-ext3.patch
posixacl: ext3 support

acl-ext3-fix-tree.patch

acl-ext3-inode.patch

posix-acl-05-ext2.patch
posixacl: ext2 support

mm1-incr1.patch

mm1-incr2.patch
posixacl: use getxattr in nfsd_get_posix_acl()

ext23-mount-options.patch
ext2/3 mount option processing cleanup

read_barrier_depends.patch
extended barrier primitives

dcache_rcu.patch
Use RCU for dcache

mpopulate.patch
remap_file_pages

rmqueue_bulk.patch
bulk page allocator

free_pages_bulk.patch
Bulk page freeing function

hot_cold_pages.patch
Hot/Cold pages and zone->lock amortisation

readahead-cold-pages.patch
Use cache-cold pages for pagecache reads.

pagevec-hot-cold-hint.patch
hot/cold hints for truncate and page reclaim

page-reservation.patch
Page reservation API

wli-show_free_areas.patch
show_free_areas extensions
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