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Re: [Xen-devel] [PATCH v3 8/8] xen: arm: allocate more than one bank for 1:1 domain 0 if needed

To: Ian Campbell <Ian.Campbell@xxxxxxxxxx>

From: Julien Grall <julien.grall@xxxxxxxxxx>

Date: Fri, 27 Jun 2014 12:54:01 +0100

Cc: stefano.stabellini@xxxxxxxxxxxxx, tim@xxxxxxx, xen-devel@xxxxxxxxxxxxx

Delivery-date: Fri, 27 Jun 2014 11:54:11 +0000

List-id: Xen developer discussion <xen-devel.lists.xen.org>

On 27/06/14 11:31, Julien Grall wrote:

Hi Ian,

On 27/06/14 10:24, Ian Campbell wrote:

This has to be: bits <= (...). Indeed, we want to try all possible zone.


Damn. I tested this on midway with "dom0_mem=128M mem=1G" and saw a
failure (which is fixed in this iteration). But obviously midway and
vexpress differ in their physical RAM addresses which caused me to miss
this second failure.

Have you tried that change? bits < 32 gives you 32-bits (i.e. 0..31)
which should cover everything up to 4G. Or else I'm misremembering some
quirk of the allocation interface.


Yes, without the change "<=" I was unable to allocate the first bank.

The memory layout is
(XEN) Checking for initrd in /chosen
(XEN) RAM: 0000000080000000 - 000000009fffffff
(XEN) RAM: 00000000a0000000 - 00000000bfffffff
(XEN)
(XEN) MODULE[1]: 000000009fee6000 - 000000009feea000
(XEN) MODULE[2]: 00000000a0008000 - 00000000a033f458
(XEN)  RESVD[0]: 0000000081f00000 - 0000000081f04000
(XEN)  RESVD[1]: 000000009fee6000 - 000000009feea000

Does vexpress really have memory high enough up that excluding bits==32
excludes it? I thought it was down in the 1-3GB range.


The first bank allocating is situated just above 2GB
BANK[0] 0x000000a8000000-0x000000b0000000

I've dump my heap just after end_bootallocator. And it doesn't look right: (XEN) heap[node=0][zone=0] -> 32763 pages (XEN) heap[node=0][zone=1] -> 0 pages (XEN) heap[node=0][zone=2] -> 0 pages (XEN) heap[node=0][zone=3] -> 0 pages (XEN) heap[node=0][zone=4] -> 0 pages (XEN) heap[node=0][zone=5] -> 0 pages (XEN) heap[node=0][zone=6] -> 0 pages (XEN) heap[node=0][zone=7] -> 0 pages (XEN) heap[node=0][zone=8] -> 0 pages (XEN) heap[node=0][zone=9] -> 0 pages (XEN) heap[node=0][zone=10] -> 0 pages (XEN) heap[node=0][zone=11] -> 0 pages (XEN) heap[node=0][zone=12] -> 0 pages (XEN) heap[node=0][zone=13] -> 0 pages (XEN) heap[node=0][zone=14] -> 0 pages (XEN) heap[node=0][zone=15] -> 0 pages (XEN) heap[node=0][zone=16] -> 0 pages (XEN) heap[node=0][zone=17] -> 0 pages (XEN) heap[node=0][zone=18] -> 0 pages (XEN) heap[node=0][zone=19] -> 0 pages (XEN) heap[node=0][zone=20] -> 219840 pages (XEN) heap[node=0][zone=21] -> 0 pages (XEN) heap[node=0][zone=22] -> 0 pages (XEN) heap[node=0][zone=23] -> 0 pages (XEN) heap[node=0][zone=24] -> 0 pages (XEN) heap[node=0][zone=25] -> 0 pages (XEN) heap[node=0][zone=26] -> 0 pages (XEN) heap[node=0][zone=27] -> 0 pages (XEN) heap[node=0][zone=28] -> 0 pages For comparison midway: (XEN) RAM: 0000000000000000 - 00000000ff7fffff (XEN) RAM: 0000000200000000 - 00000002ffffffff (XEN) (XEN) MODULE[1]: 0000000000001000 - 0000000000006000 (XEN) MODULE[2]: 0000000001000000 - 00000000012c31a8 (XEN) RESVD[0]: 0000000000000000 - 0000000000001000 (XEN) RESVD[1]: 0000000000001000 - 0000000000003000 (XEN) heap[node=0][zone=0] -> 262138 pages (XEN) heap[node=0][zone=1] -> 0 pages (XEN) heap[node=0][zone=2] -> 0 pages (XEN) heap[node=0][zone=3] -> 2 pages (XEN) heap[node=0][zone=4] -> 8 pages (XEN) heap[node=0][zone=5] -> 16 pages (XEN) heap[node=0][zone=6] -> 32 pages (XEN) heap[node=0][zone=7] -> 64 pages (XEN) heap[node=0][zone=8] -> 128 pages (XEN) heap[node=0][zone=9] -> 256 pages (XEN) heap[node=0][zone=10] -> 512 pages (XEN) heap[node=0][zone=11] -> 1024 pages (XEN) heap[node=0][zone=12] -> 2048 pages (XEN) heap[node=0][zone=13] -> 3388 pages (XEN) heap[node=0][zone=14] -> 8192 pages (XEN) heap[node=0][zone=15] -> 16384 pages (XEN) heap[node=0][zone=16] -> 32768 pages (XEN) heap[node=0][zone=17] -> 65536 pages (XEN) heap[node=0][zone=18] -> 131072 pages (XEN) heap[node=0][zone=19] -> 262144 pages (XEN) heap[node=0][zone=20] -> 259584 pages (XEN) heap[node=0][zone=21] -> 0 pages (XEN) heap[node=0][zone=22] -> 1024000 pages (XEN) heap[node=0][zone=23] -> 0 pages (XEN) heap[node=0][zone=24] -> 0 pages (XEN) heap[node=0][zone=25] -> 0 pages (XEN) heap[node=0][zone=26] -> 0 pages (XEN) heap[node=0][zone=27] -> 0 pages (XEN) heap[node=0][zone=28] -> 0 pages Arndale: (XEN) RAM: 0000000040000000 - 000000004fffffff (XEN) RAM: 0000000050000000 - 000000005fffffff (XEN) RAM: 0000000060000000 - 000000006fffffff (XEN) RAM: 0000000070000000 - 000000007fffffff (XEN) RAM: 0000000080000000 - 000000008fffffff (XEN) RAM: 0000000090000000 - 000000009fffffff (XEN) RAM: 00000000a0000000 - 00000000afffffff (XEN) RAM: 00000000b0000000 - 00000000bfffffff (XEN) (XEN) MODULE[1]: 000000004fff3000 - 0000000050000000 (XEN) MODULE[2]: 0000000040f00000 - 0000000041900000 (XEN) RESVD[0]: 0000000042000000 - 000000004200a000 (XEN) heap[node=0][zone=0] -> 65522 pages (XEN) heap[node=0][zone=1] -> 0 pages (XEN) heap[node=0][zone=2] -> 0 pages (XEN) heap[node=0][zone=3] -> 0 pages (XEN) heap[node=0][zone=4] -> 0 pages (XEN) heap[node=0][zone=5] -> 0 pages (XEN) heap[node=0][zone=6] -> 0 pages (XEN) heap[node=0][zone=7] -> 0 pages (XEN) heap[node=0][zone=8] -> 0 pages (XEN) heap[node=0][zone=9] -> 0 pages (XEN) heap[node=0][zone=10] -> 0 pages (XEN) heap[node=0][zone=11] -> 0 pages (XEN) heap[node=0][zone=12] -> 0 pages (XEN) heap[node=0][zone=13] -> 0 pages (XEN) heap[node=0][zone=14] -> 0 pages (XEN) heap[node=0][zone=15] -> 0 pages (XEN) heap[node=0][zone=16] -> 0 pages (XEN) heap[node=0][zone=17] -> 0 pages (XEN) heap[node=0][zone=18] -> 0 pages (XEN) heap[node=0][zone=19] -> 259561 pages (XEN) heap[node=0][zone=20] -> 187904 pages (XEN) heap[node=0][zone=21] -> 0 pages (XEN) heap[node=0][zone=22] -> 0 pages (XEN) heap[node=0][zone=23] -> 0 pages (XEN) heap[node=0][zone=24] -> 0 pages (XEN) heap[node=0][zone=25] -> 0 pages (XEN) heap[node=0][zone=26] -> 0 pages (XEN) heap[node=0][zone=27] -> 0 pages (XEN) heap[node=0][zone=28] -> 0 pages -- Julien Grall _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel

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