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An acct flag was added to do_munmap, true everywhere but in mremap's
move_vma: instead of updating the arch and driver sources, revert that
that change and temporarily mask VM_ACCOUNT around that one do_munmap.
Also, noticed that do_mremap fails needlessly if both shrinking _and_
moving a mapping: update old_len to pass vm area boundaries test.
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If we support mmap MAP_NORESERVE, we should support it on shared
anonymous objects: too bad that needs a few changes. do_mmap_pgoff pass
VM_ACCOUNT (or not) down to shmem_file_setup, flag stored into shmem
info, for use by shmem_delete_inode later. Also removed a harmless but
pointless call to shmem_truncate.
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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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Martin Schwidefsky <schwidefsky@de.ibm.com> reported "Bug with shared
memory" to LKML 14 May: hang due to schedule in truncate_list_pages
called from .... shm_destroy holding shm_lock spinlock. shm_destroy
needs that lock for shm_rmid, but it can be safely unlocked once link
from id to shp has been removed.
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into kroah.com:/home/greg/linux/BK/lsm-2.5
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This patch just makes some stuff in ipc/ static.
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Also move where we set sma->sem_perm.mode and .key to before ipc_addid() gets called.
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msg.c file to the msg.h file
Also move where the msg->q_perm.mode and .key values get set to before
ipc_addid() gets called to make placing a hook there easier.
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Christopher Yeoh <cyeoh@samba.org>: (Made -p1 compliant by rusty) SUSv2 semctl compliance:
The semctl call with SETVAL currently does not set sempid (at the
moment sempid is only set during a successful semop call). An
explanation from Geoff Clare of the Open Group regarding why sempid
should be set during the semctl call:
"The spec isn't very clear, but there is a statement on the semget()
page which I think justifies the assumption made by the test. It says
that upon creation, the data structure associated with each semaphore
in the set is not initialised, and that the semctl() function with
SETVAL or SETALL can be used to initialise each semaphore.
Therefore semctl() with SETVAL has to set sempid to *something*, and
since sempid contains the "process ID of the last operation", setting
it to anything other than the pid of the calling process would mean
that sempid contained misleading information. It could be argued that
setting it to zero would not be misleading, but zero cannot be the
process ID of a process, and so is not a valid value for sempid anyway."
The following patch changes semctl so when called with SETVAL
sempid is set to the pid of the calling process:
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The patch below fixes sem_exit() so that the BKL is always released.
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As we discussed some time ago, here is a patch for the SEM_UNDO change
that can be applied to linux-2.5.9.
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We always returned success even when we had no ->vm_ops
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Push BKL down to the (few) routines that actually need it,
remove it from the do_exit() path.
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Seperates shmem_sb_info from struct super_block.
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- Jens Axboe: more bio updates, fix some request list bogosity under load
- Al Viro: export seq_xxx functions
- Manfred Spraul: include file cleanups, pc110pad compile fix
- David Woodhouse: fix JFFS2 write error handling
- Dave Jones: start merging up with 2.4.x patches
- Manfred Spraul: coredump fixes, FS event counter cleanups
- me: fix SCSI CD-ROM sectorsize BIO breakage
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- Greg KH: USB updates
- Jens Axboe: more bio updates
- Christoph Rohland: fix up proper shmat semantics
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- Al Viro: mnt_list init
- Jeff Garzik: network driver update (license tags, tulip driver)
- David Miller: sparc, net updates
- Ben Collins: firewire update
- Gerd Knorr: btaudio/bttv update
- Tim Hockin: MD cleanups
- Greg KH, Petko Manolov: USB updates
- Leonard Zubkoff: DAC960 driver update
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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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- Alan Cox: continued merging
- Mingming Cao: make msgrcv/shmat check the queue/segment ID's properly
- Greg KH: USB serial init failure fix, Xircom serial converter driver
- Neil Brown: nsfd/raid/md/lockd cleanups
- Ingo Molnar: multipath RAID personality, raid xor update
- Hugh Dickins/Marcelo Tosatti: swapin read-ahead race fix
- Vojtech Pavlik: fix up some of the infrastructure for x86-64
- Robert Love: AMD 761 AGP GART support
- Jens Axboe: fix SCSI-generic queue handling race
- me: be sane about page reference bits
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- me: fix forgotten nfsd usage of filldir off_t -> loff_t change
- Alan Cox: more driver merges
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- Russell King: ARM updates
- Al Viro: more init cleanups
- Cort Dougan: more PPC updates
- David Miller: cleanups, pci mmap updates
- Neil Brown: raid resync by sector
- Alan Cox: more merging with -ac
- Johannes Erdfelt: USB updates
- Kai Germaschewski: ISDN updates
- Tobias Ringstrom: dmfe.c network driver update
- Trond Myklebust: NFS client updates and cleanups
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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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- sync up more with Alan
- Urban Widmark: smbfs and HIGHMEM fix
- Chris Mason: reiserfs tail unpacking fix ("null bytes in reiserfs files")
- Adan Richter: new cpia usb ID
- Hugh Dickins: misc small sysv ipc fixes
- Andries Brouwer: remove overly restrictive sector size check for
SCSI cd-roms
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- Jens: better ordering of requests when unable to merge
- Neil Brown: make md work as a module again (we cannot autodetect
in modules, not enough background information)
- Neil Brown: raid5 SMP locking cleanups
- Neil Brown: nfsd: handle Irix NFS clients named pipe behavior and
dentry leak fix
- maestro3 shutdown fix
- fix dcache hash calculation that could cause bad hashes under certain
circumstances (Dean Gaudet)
- David Miller: networking and sparc updates
- Jeff Garzik: include file cleanups
- Andy Grover: ACPI update
- Coda-fs error return fixes
- rth: alpha Jensen update
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- ReiserFS merge
- fix DRM R128/AGP dependency
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