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Patch from Dipankar Sarma <dipankar@gamebox.net>
This is a trivial cleanup removing two old unused macros from
kernel_stat.h that made no sense with the new per-CPU kstat.
Also included a few finicky coding style changes. Please apply.
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Patch from Ravikiran G Thirumalai <kiran@in.ibm.com>
1. Break out disk stats from kernel_stat and move disk stat to blkdev.h
2. Group cpu stat in kernel_stat and make them "per_cpu" instead of
the NR_CPUS array
3. Remove EXPORT_SYMBOL(kstat) from ksyms.c (as I noticed that no module is
using kstat)
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Patch from Rik adds "I/O wait" statistics to /proc/stat.
This allows us to determine how much system time is being spent
awaiting IO completion. This is an important statistic, as it tends to
directly subtract from job completion time.
procps-2.0.9 is OK with this, but doesn't report it.
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Moves the VM accounting out of /proc/stat and into /proc/vmstat.
The VM accounting is now per-cpu.
It also moves kstat.pgpgin and kstat.pgpgout into /proc/vmstat.
Which is a bit of a duplication of /proc/diskstats (SARD), but it's
easy, super-cheap and makes life a lot easier for all the system
monitoring applications which we just broke.
We now require procps 2.0.9.
Updated versions of top and vmstat are available at http://surriel.com
and the Cygnus CVS is uptodate for these changes. (Rik has the CVS
info at the above site).
This tidies up kernel_stat quite a lot - it now only contains CPU
things (interrupts and CPU loads) and disk things. So we now have:
/proc/stat: CPU things and disk things
/proc/vmstat: VM things (plus pgpgin, pgpgout)
The SARD patch removes the disk things from /proc/stat as well.
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A patch from Rik which adds some operational statitics to the VM.
In /proc/meminfo:
PageTables: Amount of memory used for process pagetables
PteChainTot: Amount of memory allocated for pte_chain objects
PteChainUsed: Amount of memory currently in use for pte chains.
In /proc/stat:
pageallocs: Number of pages allocated in the page allocator
pagefrees: Number of pages returned to the page allocator
(These can be used to measure the allocation rate)
pageactiv: Number of pages activated (moved to the active list)
pagedeact: Number of pages deactivated (moved to the inactive list)
pagefault: Total pagefaults
majorfault: Major pagefaults
pagescan: Number of pages which shrink_cache looked at
pagesteal: Number of pages which shrink_cache freed
pageoutrun: Number of calls to try_to_free_pages()
allocstall: Number of calls to balance_classzone()
Rik will be writing a userspace app which interprets these things.
The /proc/meminfo stats are efficient, but the /proc/stat accumulators
will cause undesirable cacheline bouncing. We need to break the disk
statistics out of struct kernel_stat and make everything else in there
per-cpu. If that doesn't happen in time for 2.6 then we disable
KERNEL_STAT_INC().
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This patch removes the concept of "logical" CPU numbers, in
preparation for CPU hotplugging.
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from struct kernel_stat. They are unused and not visible
in any way to userspace.
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- Kai Germaschewski: ISDN updates
- Al Viro: start moving buffer cache indexing to "struct block_device *"
- Greg KH: USB update
- Russell King: fix up some ARM merge issues
- Ingo Molnar: scalable scheduler
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- Anton Altaparmakov: NTFS error checking
- Johannes Erdfelt: USB updates
- OGAWA Hirofumi: FAT update
- Alan Cox: driver + s390 update merge
- Richard Henderson: fix alpha sigsuspend error return value
- Marcelo Tosatti: per-zone VM shortage
- Daniel Phillips: generic use-once optimization instead of drop-behind
- Bjorn Wesen: Cris architecture update
- Anton Altaparmakov: support for Windows Dynamic Disks
- James Washer: LDT loading SMP bug fix
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