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These were totally unused for a long time. It's interesting how
many files include swapctl.h, though..
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Alan's overcommit patch, brought to 2.5 by Robert Love.
Can't say I've tested its functionality at all, but it doesn't crash,
it has been in -ac and RH kernels for some time and I haven't observed
any of its functions on profiles.
"So what is strict VM overcommit? We introduce new overcommit
policies that attempt to never succeed an allocation that can not be
fulfilled by the backing store and consequently never OOM. This is
achieved through strict accounting of the committed address space and
a policy to allow/refuse allocations based on that accounting.
In the strictest of modes, it should be impossible to allocate more
memory than available and impossible to OOM. All memory failures
should be pushed down to the allocation routines -- malloc, mmap, etc.
The new modes are available via sysctl (same as before). See
Documentation/vm/overcommit-accounting for more information."
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Adds five sysctls for tuning the writeback behaviour:
dirty_async_ratio
dirty_background_ratio
dirty_sync_ratio
dirty_expire_centisecs
dirty_writeback_centisecs
these are described in Documentation/filesystems/proc.txt They are
basically the tradiditional knobs which we've always had...
We are accreting a ton of obsolete sysctl numbers under /proc/sys/vm/.
I didn't recycle these - just mark them unused and remove the obsolete
documentation.
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- me/Al Viro: fix bdget() oops with block device modules that don't
clean up after they exit
- Alan Cox: continued merging (drivers, license tags)
- David Miller: sparc update, network fixes
- Christoph Hellwig: work around broken drivers that add a gendisk more
than once
- Jakub Jelinek: handle more ELF loading special cases
- Trond Myklebust: NFS client and lockd reclaimer cleanups/fixes
- Greg KH: USB updates
- Mikael Pettersson: sparate out local APIC / IO-APIC config options
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- Christoph Hellwig: clean up personality handling a bit
- Robert Love: update sysctl/vm documentation
- make the three-argument (that everybody hates) "min()" be "min_t()",
and introduce a type-anal "min()" that complains about arguments of
different types.
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- Rik van Riel and others: mm rw-semaphore (ps/top ok when swapping)
- IDE: 256 sectors at a time is legal, but apparently confuses some
drives. Max out at 255 sectors instead.
- Petko Manolov: USB pegasus driver update
- make the boottime memory map printout at least almost readable.
- USB driver updates
- pte_alloc()/pmd_alloc() need page_table_lock.
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