Re: problems with e1000 and jumboframes

[Krzysztof Oledzki <olel@ans.pl>]

On Thu, 3 Aug 2006, Benjamin LaHaise wrote:

> On Thu, Aug 03, 2006 at 04:49:15PM +0200, Krzysztof Oledzki wrote:
> > With 1 GB of RAM full 1GB/3GB (CONFIG_VMSPLIT_3G_OPT) seems to be
> > enough...
>
> Nope, you lose ~128MB of RAM for vmalloc space.

No sure:

Linux version 2.6.17.7 (root@r1) (gcc version 3.4.6) #1 SMP PREEMPT Fri Jul 28 18:05:40 CEST 2006
BIOS-provided physical RAM map:
 BIOS-e820: 0000000000000000 - 00000000000a0000 (usable)
 BIOS-e820: 0000000000100000 - 000000003ffc0000 (usable)
 BIOS-e820: 000000003ffc0000 - 000000003ffcfc00 (ACPI data)
 BIOS-e820: 000000003ffcfc00 - 000000003ffff000 (reserved)
 BIOS-e820: 00000000e0000000 - 00000000f0000000 (reserved)
 BIOS-e820: 00000000fec00000 - 00000000fec90000 (reserved)
 BIOS-e820: 00000000fed00000 - 00000000fed00400 (reserved)
 BIOS-e820: 00000000fee00000 - 00000000fee10000 (reserved)
 BIOS-e820: 00000000ffb00000 - 0000000100000000 (reserved)
1023MB LOWMEM available.
found SMP MP-table at 000fe710
On node 0 totalpages: 262080
  DMA zone: 4096 pages, LIFO batch:0
  Normal zone: 257984 pages, LIFO batch:31
(...)

$ zcat /proc/config.gz |grep VMSPLIT
# CONFIG_VMSPLIT_3G is not set
CONFIG_VMSPLIT_3G_OPT=y
# CONFIG_VMSPLIT_2G is not set
# CONFIG_VMSPLIT_1G is not set


Best regards,

				Krzysztof Olędzki