url: http://www.zip.com.au/~akpm/linux/patches/2.5/2.5.47/2.5.47-mm3/
. A new kgdb stub from George Anzinger. It is significantly
stronger than the old one, especially on SMP systems. There are some
notes from George in the patch itself, as well as numerous
documentation files.
You'll need to disable the serial 16550 driver in kernel config -
it doesn't play right. (Make sure you read George's notes!)
. An updated rbtree-scheduler patch from Jens. This seems to be
working well now.
The huge queues which we've been experimenting with have continued to
pull the VM's pants down, and the last vestiges of the 2.4 page
allocator throttling had to go.
The page allocator will now never throttle a process by making it wait
on IO completion against a particular page or buffer. This has always
caused high latencies, and with the big queues, it could cause ninety
second latencies for the allocation of a single page.
The page allocator will now never throttle a process (except for the
caller of write(2)) by making it sleep on request queues. This is
fundamentally unmanageable because not only can the size of the queue
vary by a lot, but there can be a lot of queues in the machine. So
kill it.
. The busy-wait failure which occurred when more than 40% of memory
was placed under writeout has been fixed.
. The ->vm_writeback address_space_operation has been removed. The
idea behind this was to allow the filesystem to perform writearound
around the particular page. But it had a couple of problems
(described in the patch body).
So it has been removed, and we're back to page-at-a-time writepage
calls in page reclaim.
. As a consequence of going back to writepage in the VM, it is no
longer compulsory that dirty pages be on the address_space's
->dirty_pages list. So the AIO-for-direct-io patch can now dirty
pages from interrupt context. So the patches which made the
mapping->page_lock and mapping->private_lock irq-safe have been
dropped.
. The removal of the last wait_on_page_writeback() in page reclaim
has significantly reduced system latency under heavy swapout loads.
. The big queues have somewhat worsened throughput with swapstormy tests.
Having such large amounts of physical memory under writeout for such
long periods gives the VM much less memory to play with at any point
in time. Needs work. I suspect the queues are just too darn big for
desktop-class machines. We do not intend to leave them this large.
. Several tweaks here to increase the efficiency of page reclaim.
Under really heavy benchmarky loads the VM is now reclaiming 25% of
scanned pages, rather than 10%. Which sounds bad, but actually
isn't.
Most of this gain came from interrupt-time motion of written-back
pages. When IO completes, if the page appears to still be
reclaimable, move it to the tail of the inactive list for immediate
reclaim.
. And a hugetlbpage update.
Changes since 2.5.47-mm2:
-timers-net.patch
Merged
-kgdb.patch
Out with the old
+kgdb-ga.patch
In with the new
+kgdb-reboot.patch
Remote reboot via kgdb
-bttv-timer.patch
Merged into `misc'
-irq-save-vm-locks.patch
-irq-safe-private-lock.patch
No longer needed.
+misc.patch
Misc.
+htlb-combined-2.patch
Bill's stuff
+htlb-fixes.patch
Rohit's stuff
+slab-no-BUG.patch
Replace some gratuitous BUGs in slab with useful messages
+congestion-wait.patch
Fix the big-queue busy-wait problem.
+back-to-writepage.patch
Remove vm_writeback, use writepage.
-swapcache-throttle.patch
wait_on_page() is a disaster.
+simplified-vm-throttling.patch
Always throttle via blk_congestion_wait(). It is a low-latency and
controllable way of slowing page allocators to the rate at which the
IO system can retire writes.
+page-reclaim-motion.patch
Move reclaimable pages at interrupt-time.
+handle-fail-writepage.patch
Handle unwriteable pages at the VM level.
+activate-unreleaseable-pages.patch
Move pinned-via-buffers pages onto the active list.
All patches:
linus.patch
cset-1.823-to-1.856.txt.gz
kgdb-ga.patch
kgdb stub for ia32 (George Anzinger's one)
kgdb-reboot.patch
ADd a `reboot' command to kgdb
rcu-stats.patch
RCU statistics reporting
genksyms-fix.patch
modversions fix for exporting per-cpu data
buffer-debug.patch
buffer.c debugging
mbcache-cleanup.patch
mbcache: add gfp_mask parameter to free() callback, cleanups
rmap-flush-cache-page.patch
flush_cache_page while pte valid
swap-get_page-page-unlock.patch
unlock_page when get_swap_bio fails
swap-writepages-swizzled.patch
Subject: [PATCH] swap writepages swizzled
misc.patch
timer fixes
htlb-combined-2.patch
hugetlb cleanups
htlb-fixes.patch
more hugetlb fixes
slab-no-BUG.patch
improved slab error diagnostics
congestion-wait.patch
Fix busy-wait with writeback to large queues
back-to-writepage.patch
Remove mapping->vm_writeback
aio-direct-io-infrastructure.patch
AIO support for raw/O_DIRECT
aio-direct-io.patch
AIO support for raw/O_DIRECT
inlines-net.patch
reiserfs-readpages.patch
reiserfs v3 readpages support
reiserfs-readpages-fix.patch
remove-inode-buffers.patch
try to remove buffer_heads from to-be-reaped inodes
resurrect-incremental-min.patch
strengthen the `incremental min' logic in the page allocator
unfreeable-zones.patch
VM: handle zones which are full of unreclaimable pages
mpage-kmap.patch
kmap->kmap_atomic in mpage.c
nobh.patch
no-buffer-head ext2 option
inode-reclaim-balancing.patch
better inode reclaim balancing
simplified-vm-throttling.patch
Remove the final per-page throttling site in the VM
auto-unplug.patch
self-unplugging request queues
less-unplugging.patch
Remove most of the blk_run_queues() calls
page-reclaim-motion.patch
Move reclaimable pages to the tail ofthe inactive list on IO completion
handle-fail-writepage.patch
Special-case fail_writepage() in page reclaim
activate-unreleaseable-pages.patch
Move unreleasable pages onto the active list
rbtree-iosched.patch
rbtree-based IO scheduler
page-reservation.patch
Page reservation API
wli-show_free_areas.patch
show_free_areas extensions
kmap-atomic-nfs.patch
Subject: Re: [RFC] use kmap_atomic in the NFS client
dcache_rcu.patch
Use RCU for dcache
shpte-ng.patch
pagetable sharing for ia32
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This archive was generated by hypermail 2b29 : Fri Nov 15 2002 - 22:00:36 EST