Messages in this thread | | | Date | Sun, 23 Feb 2003 23:00:23 -0800 | From | Andrew Morton <> | Subject | 2.5.62-mm3 |
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http://www.kernel.org/pub/linux/kernel/people/akpm/patches/2.5/2.5.62/2.5.62-mm3/
. Included Dave McCracken's "Object-based RMAP" patch.
What this dopey name actually means is that when page reclaim tries to unmap a file-backed page it walks the VMAs attached to the address_space and the pagetables attached thereto. So there is no need for pte_chains for these pages.
The patch is simple, but potentially has search complexity problems with weird workloads which have high sharing levels. Allegedly. Work is ongoing.
. Several more anticipatory scheduler tweaks. This has been an exercise in hunting down situations in which the scheduler does the wrong thing, and plugging those up.
The only known problem at this time is a ~20% falloff in threaded OLTP-style database activity. This is really complex, involving interactions between reads, O_SYNC writes and i_sem contention.
The problem will recede to less than 10% when we retune the anticipation timer (it is currently set too high just so we can discover these things).
But we do not see a sane way of fixing this for real. At present it will need to be manually tuned away with
echo 0 > /sys/block/hdXX/antic_expire
Later, we will probably have to perform this disabling automatically.
. There are some performance fixes which will help OLTP-style workloads which are using regular old files through the pagecache. It seems to be running maybe 60-70% faster than 2.4.x now, but it varies.
. A few performance patches to reduce the amount of work we do in update_atime() and __mark_inode_dirty() should pull back some of the regressions which have been observed in there.
Changes since 2.5.62-mm3:
+mm.patch
Update EXTRAVERSION
-anton-1.patch -ppc64-timer-fix.patch -ppc-entry-build-fix.patch -ppc64-time-warning-fix.patch
Merged
+user-times-jiffies-wrap-fix.patch
Jiffy wrapping fix for process time accounting
+slab-batchcount-limit-fix.patch
Fix the fix for excessive interrupts-off time in debug-enabled slab.
+use-find_get_page.patch
Cleanup
+irda-interruptible-sleep.patch
Don't let kIrDAd contribute to load average. +as-hz-1000-fix.patch +as-tidy-up-rename.patch +as-update-1.patch +as-break-anticipation-on-write.patch +as-break-if-readahead.patch +as-notice-exit.patch
Anticipatory scheduler work
+readahead-shrink-to-zero.patch
Allow readahead to adapt to zero.
+objrmap-2.5.62-5.patch
VMA-based page unmapping
+kill-bogus-wakeup-messge.patch
Fix swsusp vs pdflush problem
+dont-sync-with-stopped-pdflush.patch
swsusp fix
+oprofile-up-fix.patch
Fix oprofile for uniprocessors
+update_atime-speedup.patch +ext2-update_atime_speedup.patch +ext3-update_atime_speedup.patch
Speed up uddate_atime() and __mark_inode_dirty()
+UPDATE_ATIME-to-update_atime.patch
Rename UPDATE_ATIME() to update_atime()
+irq-balance-disable-fix.patch
Fix the disabling of kird
+oom-killer-dont-spin-on-same-task.patch
Fix the oom-killer
+add-missing-global_flush_tlb-calls.patch
Add some global TLB flushes around change_page_attr()
+ext3-O_SYNC-speedup.patch
Speed up ext3 O_SYNC writes
+remove-MAX_BLKDEV-from-genhd.patch
Clear out some legacy stuff.
All 73 patches
linus.patch Latest from Linus
mm.patch add -mmN to EXTRAVERSION
ppc64-reloc_hide.patch
ppc64-pci-patch.patch Subject: pci patch
ppc64-e100-fix.patch fix e100 for big-endian machines
ppc64-aio-32bit-emulation.patch 32/64bit emulation for aio
ppc64-64-bit-exec-fix.patch Subject: 64bit exec
sym-do-160.patch make the SYM driver do 160 MB/sec
kgdb.patch
nfsd-disable-softirq.patch Fix race in svcsock.c in 2.5.61
report-lost-ticks.patch make lost-tick detection more informative
devfs-fix.patch
ptrace-flush.patch Subject: [PATCH] ptrace on 2.5.44
buffer-debug.patch buffer.c debugging
warn-null-wakeup.patch
ext3-truncate-ordered-pages.patch ext3: explicitly free truncated pages
deadline-dispatching-fix.patch deadline IO scheduler dispatching fix
nfs-unstable-pages.patch "unstable" page accounting for NFS.
initial-jiffies.patch make jiffies wrap 5 min after boot
user-times-jiffies-wrap-fix.patch Fix user time accounting's handling of jiffies wrap
reiserfs_file_write-4.patch ReiserFS CPU efficient large writes for 2.5
tcp-wakeups.patch Use fast wakeups in TCP/IPV4
lockd-lockup-fix.patch Subject: Re: Fw: Re: 2.4.20 NFS server lock-up (SMP)
rcu-stats.patch RCU statistics reporting
ext3-journalled-data-assertion-fix.patch Remove incorrect assertion from ext3
nfs-speedup.patch
nfs-oom-fix.patch nfs oom fix
sk-allocation.patch Subject: Re: nfs oom
nfs-more-oom-fix.patch
nfs-sendfile.patch Implement sendfile() for NFS
rpciod-atomic-allocations.patch Make rcpiod use atomic allocations
put_page-speedup.patch hugetlb put_page speedup
linux-isp.patch
isp-update-1.patch
remove-unused-congestion-stuff.patch Subject: [PATCH] remove unused congestion stuff
slab-batchcount-limit-fix.patch Fix slab batchcount limiting code
crc32-speedup-2.patch Subject: [PATCH] crc32 improvements for 2.5, more optimizations
aic-makefile-fix.patch aicasm Makefile fix
atm_dev_sem.patch convert atm_dev_lock from spinlock to semaphore
flush-tlb-all-2.patch flush_tlb_all preempt safety for voyager and x86_64
linux-2.5.62-early_ioremap_A0.patch Early ioremap support for ia32
linux-2.5.62-x440disco_A0.patch x440 SRAT parsing
use-find_get_page.patch use find_get_page() in do_generic_mapping_read()
irda-interruptible-sleep.patch Make kIrDAd us interruptible sleep
dget-BUG.patch Check for zero d_count in dget()
sysfs-dget-fix.patch sysfs dget() fix
disk-accounting-fix.patch SARD accounting fix
hugh-inode-pruning-race-fix.patch Fix race between umount and iprune
as-iosched.patch anticipatory I/O scheduler
as-comments-and-tweaks.patch antsched: commentary and
as-hz-1000-fix.patch Fix anticipatory scheduler for HZ=100
as-tidy-up-rename.patch tidy up AS rename
as-update-1.patch AS update
as-break-anticipation-on-write.patch AS break on write
as-break-if-readahead.patch detect overlapping reads and writes
as-notice-exit.patch stop anticipation if a task exits
readahead-shrink-to-zero.patch Allow VFS readahead to fall to zero
cfq-2.patch CFQ scheduler, #2
smalldevfs.patch smalldevfs
smalldevfs-dcache_rcu-fix.patch Subject: Re: 2.5.61-mm1
objrmap-2.5.62-5.patch object-based rmap
kill-bogus-wakeup-messge.patch swsusp: kill bogus wakeup warning
dont-sync-with-stopped-pdflush.patch swsusp: don't sync with stopped pdflush
oprofile-up-fix.patch fix oprofile on UP (lockless sync)
update_atime-speedup.patch speed up update_atime()
ext2-update_atime_speedup.patch Use one_sec_update_atime in ext2
ext3-update_atime_speedup.patch Use one_sec_update_atime in ext2
UPDATE_ATIME-to-update_atime.patch Rename UPDATE_ATIME to update_atime
irq-balance-disable-fix.patch fix IRQ balancing disable controls
oom-killer-dont-spin-on-same-task.patch don't let OOM killer kill same process repeatedly
add-missing-global_flush_tlb-calls.patch add some missing gloabl_flush_tlb() calls
ext3-O_SYNC-speedup.patch ext3: speed up O_SYNC writes
remove-MAX_BLKDEV-from-genhd.patch remove MAX_BLKDEV from genhd.c
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