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Subject2.5.34-mm1

url: http://www.zip.com.au/~akpm/linux/patches/2.5/2.5.34/2.5.34-mm1/

A fair amount of new stuff here. The testing status is "light".

Since 2.5.33-mm5:

-zone-pages-reporting.patch
-enospc-recovery-fix.patch
-fix-faults.patch
-refill-rate.patch
-refill-rate-fix.patch
-copy_user_atomic.patch
-kmap_atomic_reads.patch
-kmap_atomic_writes.patch

Merged.

-filemap-integration.patch
-filemap-integration-fixes.patch

Folded into readv-writev.patch

-slablru.patch
-slablru-speedup.patch

We decided that there wasn't a lot of point in putting slab pages on the
LRU. They're not really being aged on the LRU. Their presence on the
LRU was merely telling us

(page reclaim pressure) * (proportion of slab pages)

and we can calculate that directly, without using the LRU for it.

+sharedmem.patch

Display in /proc/meminfo the amount of memory which is mapped into
process address space.

+slab-stats.patch

Display total slab memory in /proc/meminfo

+free_area_init-cleanup.patch
+alloc_pages-cleanup.patch

discontigmem code cleanups

+statm_pgd_range-sucks.patch

He's right. It does. Did.

+remove-sync_thresh.patch

Remove /proc/sys/vm/dirty_sync_ratio.

+sync-helper.patch

Speed up /bin/sync against multiple spindles

+slabasap.patch

A patch from Ed Tomlinson which improves the way in which the kernel
reclaims slab objects.

The theory is: a cached object's usefulness is measured in terms of the
number of disk seeks which is saves. Furthermore, we assume that one
dentry or inode saves as many seeks as one pagecache page.

So we reap one slab object for each reaped pagecache page (actually, we
_scan_ one slab object for each scanned pagecache page).

Furthermore we assume that one swapout costs twice as many seeks as one
pagecache page, and twice as many seeks as one slab object. So we
double the pressure on slab when anonymous pages are being considered
for eviction.

The code works nicely, and smoothly. Possibly it does not shrink slab
hard enough, but that is now very easy to tune up and down. It is just:

ratio *= 3;

in shrink_caches().

+write-deadlock.patch

Fix the write()-into-mmapped-page-which-got-evicted-at-the-wrong-time
deadlock.

+segq.patch

Patch from Rik which makes the VM prefer to reclaim pagecache rather
than pages which are mapped into process memory.

It makes the VM significantly less inclined to swap out and evict
program text in the presence of heavy disk I/O, and is very nice.

Still needs a few things doing to it, but I'm running it on my
desktop and it has caused a very noticeable decrease in suckiness.


Also, the `Buffers:' accounting in /proc/meminfo has been redone to not
walk inode_unused. count_list() won't appear on profiles any more.



linus.patch
cset-1.575-to-1.600.txt.gz

scsi_hack.patch
Fix block-highmem for scsi

ext3-htree.patch
Indexed directories for ext3

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

throttling-fix.patch
Fix throttling of heavy write()rs.

sleeping-release_page.patch
Allow a_ops->releasepage() to sleep again

dirty-state-accounting.patch
Make the global dirty memory accounting more accurate

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

discontig-cleanup-1.patch
i386 discontigmem coding cleanups

discontig-cleanup-2.patch
i386 discontigmem cleanups

writeback-thresholds.patch
Downward adjustments to the default dirtymemory thresholds

buffer-strip.patch
Limit the consumption of ZONE_NORMAL by buffer_heads

rmap-speedup.patch
rmap pte_chain space and CPU reductions

wli-highpte.patch
Resurrect CONFIG_HIGHPTE - ia32 pagetables in highmem

readv-writev.patch
O_DIRECT support for readv/writev

llzpr.patch
Reduce scheduling latency across zap_page_range

buffermem.patch
Resurrect buffermem accounting

lpp.patch
ia32 huge tlb pages

lpp2.patch
hugetlbpage fixes

sharedmem.patch
Add /proc/meminfo:Mapped - tha amount of memory which is mapped into pagetables

ext3-sb.patch
u.ext3_sb -> generic_sbp

oom-fix.patch
Fix an OOM condition on big highmem machines

tlb-cleanup.patch
Clean up the tlb gather code

dump-stack.patch
arch-neutral dump_stack() function

wli-cleanup.patch
random cleanups

madvise-move.patch
move mdavise implementation into mm/madvise.c

split-vma.patch
VMA splitting patch

mmap-fixes.patch
mmap.c cleanup and lock ranking fixes

buffer-ops-move.patch
Move submit_bh() and ll_rw_block() into fs/buffer.c

slab-stats.patch
Display total slab memory in /proc/meminfo

writeback-control.patch
Cleanup and extension of the writeback paths

free_area_init-cleanup.patch
free_area_init() code cleanup

alloc_pages-cleanup.patch
alloc_pages cleanup and optimisation

statm_pgd_range-sucks.patch
Remove the pagetable walk from /proc/stat

remove-sync_thresh.patch
Remove /proc/sys/vm/dirty_sync_thresh

queue-congestion.patch
Infrastructure for communicating request queue congestion to the VM

nonblocking-ext2-preread.patch
avoid ext2 inode prereads if the queue is congested

nonblocking-pdflush.patch
non-blocking writeback infrastructure, use it for pdflush

nonblocking-vm.patch
Non-blocking page reclaim

sync-helper.patch
Speed up sys_sync()

slabasap.patch
Early and smarter shrinking of slabs

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

segq.patch
Modified segmented queue algorithm for page aging
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