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linux-2.6
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linux-2.6/drivers
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Christoph Lameter bc3e53f682 mm: distinguish between mlocked and pinned pages 
Some kernel components pin user space memory (infiniband and perf) (by
increasing the page count) and account that memory as "mlocked".

The difference between mlocking and pinning is:

A. mlocked pages are marked with PG_mlocked and are exempt from
   swapping. Page migration may move them around though.
   They are kept on a special LRU list.

B. Pinned pages cannot be moved because something needs to
   directly access physical memory. They may not be on any
   LRU list.

I recently saw an mlockalled process where mm->locked_vm became
bigger than the virtual size of the process (!) because some
memory was accounted for twice:

Once when the page was mlocked and once when the Infiniband
layer increased the refcount because it needt to pin the RDMA
memory.

This patch introduces a separate counter for pinned pages and
accounts them seperately.

Signed-off-by: Christoph Lameter <cl@linux.com>
Cc: Mike Marciniszyn <infinipath@qlogic.com>
Cc: Roland Dreier <roland@kernel.org>
Cc: Sean Hefty <sean.hefty@intel.com>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 		2011-10-31 17:30:46 -07:00
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accessibility
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acpi Merge branch 'next-rebase' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci 2011-10-28 14:20:44 -07:00
amba
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ata Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2011-10-28 16:44:18 -07:00
atm Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2011-10-25 13:25:22 +02:00
auxdisplay
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base Merge branch 'pm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm 2011-10-25 15:18:39 +02:00
bcma
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block Merge branch 'for-linus' of git://ceph.newdream.net/git/ceph-client 2011-10-28 16:42:18 -07:00
bluetooth Merge branch 'pm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm 2011-10-25 15:18:39 +02:00
cdrom
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char Merge branch 'drm-core-next' of git://people.freedesktop.org/~airlied/linux 2011-10-28 05:54:23 -07:00
clk
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clocksource Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2011-10-26 17:15:03 +02:00
connector
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cpufreq Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2011-10-26 17:15:03 +02:00
cpuidle
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crypto
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dca
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devfreq
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dio
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dma
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edac amd64_edac: Cleanup return type of amd64_determine_edac_cap() 2011-10-06 12:35:46 +02:00
eisa
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firewire
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firmware
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gpio Merge branch 'gpio/next' of git://git.secretlab.ca/git/linux-2.6 2011-10-29 07:27:45 -07:00
gpu Merge branch 'drm-core-next' of git://people.freedesktop.org/~airlied/linux 2011-10-28 05:54:23 -07:00
hid Merge branch 'next' into for-linus 2011-10-26 21:46:20 -07:00
hv hv: remove struct hv_device_info from hyperv.h 2011-10-11 09:51:22 -06:00
hwmon Merge branch 'x86-microcode-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2011-10-28 05:14:48 -07:00
hwspinlock
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i2c i2c-algo-pca: Return standard fault codes 2011-10-30 13:47:25 +01:00
ide Merge branch 'gpio' of http://ftp.arm.linux.org.uk/pub/linux/arm/kernel/git-cur/linux-2.6-arm 2011-10-27 08:39:10 +02:00
idle
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ieee802154
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infiniband mm: distinguish between mlocked and pinned pages 2011-10-31 17:30:46 -07:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound 2011-10-28 14:25:01 -07:00
iommu Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu 2011-10-30 15:46:19 -07:00
isdn Merge branch 'tty-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty 2011-10-26 15:11:09 +02:00
leds Merge branch 'x86-geode-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2011-10-28 05:04:26 -07:00
lguest lguest: move process freezing before pending signals check 2011-10-27 10:56:18 +10:30
macintosh
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mca
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md Merge branch 'for-linus' of git://neil.brown.name/md 2011-10-31 15:21:29 -07:00
media Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu 2011-10-30 15:46:19 -07:00
memstick
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message
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mfd Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound 2011-10-28 14:25:01 -07:00
misc Merge branch 'driver-core-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core 2011-10-25 12:13:59 +02:00
mmc Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc 2011-10-28 14:16:11 -07:00
mtd Merge branch 'gpio' of http://ftp.arm.linux.org.uk/pub/linux/arm/kernel/git-cur/linux-2.6-arm 2011-10-27 08:39:10 +02:00
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2011-10-31 15:22:44 -07:00
nfc
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nubus
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of of_mdio: Don't phy_scan_fixups() twice 2011-10-25 06:55:52 +02:00
oprofile
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parisc
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parport parport_pc: release IO region properly if unsupported ITE887x card is found 2011-10-18 14:17:40 -07:00
pci Merge branch 'next-rebase' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci 2011-10-28 14:20:44 -07:00
pcmcia Merge branch 'gpio' of http://ftp.arm.linux.org.uk/pub/linux/arm/kernel/git-cur/linux-2.6-arm 2011-10-27 08:39:10 +02:00
pinctrl pinctrl/sirf: fix sirfsoc_get_group_pins prototype 2011-10-25 10:43:57 +02:00
platform thinkpad_acpi: Fix printk typo 'bluestooth' 2011-10-07 09:39:51 +02:00
pnp
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power
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pps
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ps3
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ptp
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rapidio
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regulator regulator: Add WM1811 support 2011-10-07 12:49:18 +01:00
rtc
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s390 Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2011-10-28 16:44:18 -07:00
sbus
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scsi Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2011-10-28 16:44:18 -07:00
sfi
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sh
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sn
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spi Merge branch 'spi/next' of git://git.secretlab.ca/git/linux-2.6 2011-10-29 07:28:36 -07:00
ssb
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staging Merge branch 'fbdev-next' of git://github.com/schandinat/linux-2.6 2011-10-30 15:30:01 -07:00
target Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2011-10-25 12:11:02 +02:00
tc
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telephony
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thermal
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tty Merge branch 'spi/next' of git://git.secretlab.ca/git/linux-2.6 2011-10-29 07:28:36 -07:00
uio uio: Support physical addresses >32 bits on 32-bit systems 2011-10-18 11:18:57 -07:00
usb Merge branch 'devel-stable' of http://ftp.arm.linux.org.uk/pub/linux/arm/kernel/git-cur/linux-2.6-arm 2011-10-28 12:02:27 -07:00
uwb
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vhost
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video Merge branch 'fbdev-next' of git://github.com/schandinat/linux-2.6 2011-10-30 15:30:01 -07:00
virt
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virtio Add ethtool -g support to virtio_net 2011-10-24 02:07:21 -04:00
vlynq
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w1
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watchdog Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2011-10-26 17:03:38 +02:00
xen Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2011-10-26 16:44:09 +02:00
zorro zorro: Fix four checkpatch warnings 2011-10-24 21:00:34 +02:00
Kconfig Merge branch 'staging-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging 2011-10-26 15:39:02 +02:00
Makefile Merge branch 'staging-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging 2011-10-26 15:39:02 +02:00