Revision d312ae878b6aed3912e1acaaf5d0b2a9d08a4f11 authored by David Vrabel on 19 August 2011, 14:57:16 UTC, committed by Konrad Rzeszutek Wilk on 01 September 2011, 13:41:40 UTC
Use the domain's maximum reservation to limit the amount of extra RAM
for the memory balloon. This reduces the size of the pages tables and
the amount of reserved low memory (which defaults to about 1/32 of the
total RAM).
On a system with 8 GiB of RAM with the domain limited to 1 GiB the
kernel reports:
Before:
Memory: 627792k/4472000k available
After:
Memory: 549740k/11132224k available
A increase of about 76 MiB (~1.5% of the unused 7 GiB). The reserved
low memory is also reduced from 253 MiB to 32 MiB. The total
additional usable RAM is 329 MiB.
For dom0, this requires at patch to Xen ('x86: use 'dom0_mem' to limit
the number of pages for dom0') (c/s 23790)
CC: stable@kernel.org
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
1 parent 60c5f08
| File | Mode | Size |
|---|---|---|
| ABI | ||
| DocBook | ||
| PCI | ||
| RCU | ||
| accounting | ||
| acpi | ||
| aoe | ||
| arm | ||
| auxdisplay | ||
| blackfin | ||
| block | ||
| blockdev | ||
| cdrom | ||
| cgroups | ||
| connector | ||
| console | ||
| cpu-freq | ||
| cpuidle | ||
| cris | ||
| crypto | ||
| development-process | ||
| device-mapper | ||
| devicetree | ||
| driver-model | ||
| dvb | ||
| early-userspace | ||
| fault-injection | ||
| fb | ||
| filesystems | ||
| firmware_class | ||
| frv | ||
| hid | ||
| hwmon | ||
| i2c | ||
| i2o | ||
| ia64 | ||
| ide | ||
| infiniband | ||
| input | ||
| ioctl | ||
| isdn | ||
| ja_JP | ||
| kbuild | ||
| kdump | ||
| ko_KR | ||
| laptops | ||
| leds | ||
| m68k | ||
| make | ||
| mips | ||
| misc-devices | ||
| mmc | ||
| mn10300 | ||
| mtd | ||
| namespaces | ||
| netlabel | ||
| networking | ||
| nfc | ||
| parisc | ||
| pcmcia | ||
| power | ||
| powerpc | ||
| pps | ||
| prctl | ||
| pti | ||
| ptp | ||
| rapidio | ||
| s390 | ||
| scheduler | ||
| scsi | ||
| security | ||
| serial | ||
| sh | ||
| sound | ||
| sparc | ||
| spi | ||
| sysctl | ||
| target | ||
| telephony | ||
| thermal | ||
| timers | ||
| trace | ||
| usb | ||
| vDSO | ||
| video4linux | ||
| virtual | ||
| vm | ||
| w1 | ||
| watchdog | ||
| wimax | ||
| x86 | ||
| zh_CN | ||
| .gitignore | -rw-r--r-- | 107 bytes |
| 00-INDEX | -rw-r--r-- | 11.8 KB |
| BUG-HUNTING | -rw-r--r-- | 8.1 KB |
| Changes | -rw-r--r-- | 11.7 KB |
| CodingStyle | -rw-r--r-- | 29.1 KB |
| DMA-API-HOWTO.txt | -rw-r--r-- | 28.0 KB |
| DMA-API.txt | -rw-r--r-- | 26.5 KB |
| DMA-ISA-LPC.txt | -rw-r--r-- | 5.2 KB |
| DMA-attributes.txt | -rw-r--r-- | 1.3 KB |
| HOWTO | -rw-r--r-- | 27.2 KB |
| IPMI.txt | -rw-r--r-- | 28.5 KB |
| IRQ-affinity.txt | -rw-r--r-- | 2.5 KB |
| IRQ.txt | -rw-r--r-- | 962 bytes |
| Intel-IOMMU.txt | -rw-r--r-- | 3.8 KB |
| Makefile | -rw-r--r-- | 160 bytes |
| ManagementStyle | -rw-r--r-- | 12.9 KB |
| SAK.txt | -rw-r--r-- | 2.8 KB |
| SM501.txt | -rw-r--r-- | 2.8 KB |
| SecurityBugs | -rw-r--r-- | 1.8 KB |
| SubmitChecklist | -rw-r--r-- | 4.4 KB |
| SubmittingDrivers | -rw-r--r-- | 6.3 KB |
| SubmittingPatches | -rw-r--r-- | 28.5 KB |
| VGA-softcursor.txt | -rw-r--r-- | 2.0 KB |
| applying-patches.txt | -rw-r--r-- | 19.5 KB |
| atomic_ops.txt | -rw-r--r-- | 19.0 KB |
| bad_memory.txt | -rw-r--r-- | 1.1 KB |
| basic_profiling.txt | -rw-r--r-- | 1.7 KB |
| binfmt_misc.txt | -rw-r--r-- | 5.9 KB |
| braille-console.txt | -rw-r--r-- | 1.4 KB |
| bt8xxgpio.txt | -rw-r--r-- | 4.3 KB |
| btmrvl.txt | -rw-r--r-- | 2.9 KB |
| bus-virt-phys-mapping.txt | -rw-r--r-- | 7.9 KB |
| cachetlb.txt | -rw-r--r-- | 17.1 KB |
| circular-buffers.txt | -rw-r--r-- | 7.6 KB |
| coccinelle.txt | -rw-r--r-- | 7.9 KB |
| cpu-hotplug.txt | -rw-r--r-- | 14.6 KB |
| cpu-load.txt | -rw-r--r-- | 3.0 KB |
| cputopology.txt | -rw-r--r-- | 3.8 KB |
| dcdbas.txt | -rw-r--r-- | 3.6 KB |
| debugging-modules.txt | -rw-r--r-- | 954 bytes |
| debugging-via-ohci1394.txt | -rw-r--r-- | 7.4 KB |
| dell_rbu.txt | -rw-r--r-- | 4.9 KB |
| devices.txt | -rw-r--r-- | 115.8 KB |
| dmaengine.txt | -rw-r--r-- | 4.4 KB |
| dontdiff | -rw-r--r-- | 2.5 KB |
| dynamic-debug-howto.txt | -rw-r--r-- | 9.5 KB |
| edac.txt | -rw-r--r-- | 26.9 KB |
| eisa.txt | -rw-r--r-- | 7.1 KB |
| email-clients.txt | -rw-r--r-- | 8.8 KB |
| feature-removal-schedule.txt | -rw-r--r-- | 20.0 KB |
| flexible-arrays.txt | -rw-r--r-- | 5.5 KB |
| futex-requeue-pi.txt | -rw-r--r-- | 5.0 KB |
| gcov.txt | -rw-r--r-- | 7.5 KB |
| gpio.txt | -rw-r--r-- | 30.4 KB |
| highuid.txt | -rw-r--r-- | 2.4 KB |
| hw_random.txt | -rw-r--r-- | 3.5 KB |
| hwspinlock.txt | -rw-r--r-- | 11.7 KB |
| init.txt | -rw-r--r-- | 2.5 KB |
| initrd.txt | -rw-r--r-- | 14.1 KB |
| intel_txt.txt | -rw-r--r-- | 10.2 KB |
| io-mapping.txt | -rw-r--r-- | 3.2 KB |
| io_ordering.txt | -rw-r--r-- | 1.9 KB |
| iostats.txt | -rw-r--r-- | 7.9 KB |
| irqflags-tracing.txt | -rw-r--r-- | 2.6 KB |
| isapnp.txt | -rw-r--r-- | 433 bytes |
| java.txt | -rw-r--r-- | 10.7 KB |
| kernel-doc-nano-HOWTO.txt | -rw-r--r-- | 11.4 KB |
| kernel-docs.txt | -rw-r--r-- | 33.6 KB |
| kernel-parameters.txt | -rw-r--r-- | 93.0 KB |
| kmemcheck.txt | -rw-r--r-- | 29.8 KB |
| kmemleak.txt | -rw-r--r-- | 7.7 KB |
| kobject.txt | -rw-r--r-- | 17.6 KB |
| kprobes.txt | -rw-r--r-- | 29.5 KB |
| kref.txt | -rw-r--r-- | 6.1 KB |
| ldm.txt | -rw-r--r-- | 3.8 KB |
| local_ops.txt | -rw-r--r-- | 6.1 KB |
| lockdep-design.txt | -rw-r--r-- | 8.8 KB |
| lockstat.txt | -rw-r--r-- | 10.7 KB |
| logo.gif | -rw-r--r-- | 16.0 KB |
| logo.txt | -rw-r--r-- | 563 bytes |
| magic-number.txt | -rw-r--r-- | 9.7 KB |
| mca.txt | -rw-r--r-- | 11.3 KB |
| md.txt | -rw-r--r-- | 24.9 KB |
| media-framework.txt | -rw-r--r-- | 13.9 KB |
| memory-barriers.txt | -rw-r--r-- | 82.3 KB |
| memory-hotplug.txt | -rw-r--r-- | 15.0 KB |
| memory.txt | -rw-r--r-- | 1.2 KB |
| mono.txt | -rw-r--r-- | 2.5 KB |
| mutex-design.txt | -rw-r--r-- | 5.8 KB |
| nmi_watchdog.txt | -rw-r--r-- | 4.2 KB |
| nommu-mmap.txt | -rw-r--r-- | 12.7 KB |
| numastat.txt | -rw-r--r-- | 866 bytes |
| oops-tracing.txt | -rw-r--r-- | 12.5 KB |
| padata.txt | -rw-r--r-- | 7.3 KB |
| parport-lowlevel.txt | -rw-r--r-- | 32.2 KB |
| parport.txt | -rw-r--r-- | 8.8 KB |
| pi-futex.txt | -rw-r--r-- | 5.7 KB |
| pnp.txt | -rw-r--r-- | 6.8 KB |
| preempt-locking.txt | -rw-r--r-- | 5.2 KB |
| printk-formats.txt | -rw-r--r-- | 4.9 KB |
| prio_tree.txt | -rw-r--r-- | 5.2 KB |
| rbtree.txt | -rw-r--r-- | 9.1 KB |
| rfkill.txt | -rw-r--r-- | 4.8 KB |
| robust-futex-ABI.txt | -rw-r--r-- | 8.7 KB |
| robust-futexes.txt | -rw-r--r-- | 9.4 KB |
| rt-mutex-design.txt | -rw-r--r-- | 32.8 KB |
| rt-mutex.txt | -rw-r--r-- | 3.5 KB |
| rtc.txt | -rw-r--r-- | 15.5 KB |
| serial-console.txt | -rw-r--r-- | 4.0 KB |
| sgi-ioc4.txt | -rw-r--r-- | 2.0 KB |
| sgi-visws.txt | -rw-r--r-- | 678 bytes |
| sparse.txt | -rw-r--r-- | 3.0 KB |
| spinlocks.txt | -rw-r--r-- | 6.5 KB |
| stable_api_nonsense.txt | -rw-r--r-- | 9.2 KB |
| stable_kernel_rules.txt | -rw-r--r-- | 3.6 KB |
| svga.txt | -rw-r--r-- | 14.1 KB |
| sysfs-rules.txt | -rw-r--r-- | 8.1 KB |
| sysrq.txt | -rw-r--r-- | 11.6 KB |
| unaligned-memory-access.txt | -rw-r--r-- | 10.0 KB |
| unicode.txt | -rw-r--r-- | 6.5 KB |
| unshare.txt | -rw-r--r-- | 13.1 KB |
| vgaarbiter.txt | -rw-r--r-- | 8.1 KB |
| video-output.txt | -rw-r--r-- | 1.1 KB |
| volatile-considered-harmful.txt | -rw-r--r-- | 5.6 KB |
| workqueue.txt | -rw-r--r-- | 15.6 KB |
| xz.txt | -rw-r--r-- | 5.7 KB |
| zorro.txt | -rw-r--r-- | 2.8 KB |
Computing file changes ...
