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| author | Igor Mammedov <imammedo@redhat.com> | 2014-10-31 16:38:42 +0000 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2014-11-24 20:57:10 +0200 |
| commit | 085f8e88ba73b7ff80298b0085f6e615d3b5c45f (patch) | |
| tree | 79425a9f70b4e272a94ab2c8f8b2b038fee001c1 /hw/pci | |
| parent | b03541fa7722d64a1c961a8467d778d7e086a933 (diff) | |
| download | qemu-085f8e88ba73b7ff80298b0085f6e615d3b5c45f.zip qemu-085f8e88ba73b7ff80298b0085f6e615d3b5c45f.tar.gz qemu-085f8e88ba73b7ff80298b0085f6e615d3b5c45f.tar.bz2 | |
pc: count in 1Gb hugepage alignment when sizing hotplug-memory container
if DIMMs with different size/alignment are interleaved
in creation order, it could lead to hotplug-memory
container fragmentation and following inability to use
all RAM upto maxmem.
For example:
-m 4G,slots=3,maxmem=7G
-object memory-backend-file,id=mem-1,size=256M,mem-path=/pagesize-2MB
-device pc-dimm,id=mem1,memdev=mem-1
-object memory-backend-file,id=mem-2,size=1G,mem-path=/pagesize-1GB
-device pc-dimm,id=mem2,memdev=mem-2
-object memory-backend-file,id=mem-3,size=256M,mem-path=/pagesize-2MB
-device pc-dimm,id=mem3,memdev=mem-3
fragments hotplug-memory container and doesn't allow
to use 1GB hugepage backend to consume remainig 1Gb.
To ease managment factor count in max 1Gb alignment for
each memory slot when sizing hotplug-memory region so
that regadless of fragmentaion it would be possible to
add max aligned DIMM.
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'hw/pci')
0 files changed, 0 insertions, 0 deletions