On 14 April 2010 11:47, Pedro Ribeiro <pedrib@xxxxxxxxx> wrote: > On 14 April 2010 11:09, Daniel Mack <daniel@xxxxxxxx> wrote: > >> Thanks! So the only thing I can do for now is submit exactly this patch. >> At least, it helps you and it shouldn't break anything. The question >> remains whether this type of memory should be used for all >> transfer_buffers. >> > > Is there any chance you could push this to -stable? I don't care > because I always use the latest kernel, but the next Debian stable and > Ubuntu LTS are going to use 2.6.32. > >>> Any idea why is mem=4096m different than a regular boot since I have 4GB anyway? >> >> On Fri, Apr 09, 2010 at 04:11:52PM -0600, Robert Hancock wrote: >>> If you have 4GB of RAM then almost certainly you have memory located >>> at addresses over 4GB. If you look at the e820 memory map printed at >>> the start of dmesg on bootup and see entries with addresses of >>> 100000000 or higher reported as usable, then this is the case. >> >> Could you post the these e820 line from your dmesg when booted with >> mem=4096? >> >> Daniel >> >> > > This is the e820 WITHOUT mem=4096m: > > [ 0.000000] BIOS-provided physical RAM map: > [ 0.000000] BIOS-e820: 0000000000000000 - 000000000009ec00 (usable) > [ 0.000000] BIOS-e820: 000000000009ec00 - 00000000000a0000 (reserved) > [ 0.000000] BIOS-e820: 00000000000dc000 - 0000000000100000 (reserved) > [ 0.000000] BIOS-e820: 0000000000100000 - 00000000bd4a1000 (usable) > [ 0.000000] BIOS-e820: 00000000bd4a1000 - 00000000bd4a7000 (reserved) > [ 0.000000] BIOS-e820: 00000000bd4a7000 - 00000000bd5b8000 (usable) > [ 0.000000] BIOS-e820: 00000000bd5b8000 - 00000000bd60f000 (reserved) > [ 0.000000] BIOS-e820: 00000000bd60f000 - 00000000bd6c6000 (usable) > [ 0.000000] BIOS-e820: 00000000bd6c6000 - 00000000bd6d1000 (ACPI NVS) > [ 0.000000] BIOS-e820: 00000000bd6d1000 - 00000000bd6d4000 (ACPI data) > [ 0.000000] BIOS-e820: 00000000bd6d4000 - 00000000bd6d8000 (reserved) > [ 0.000000] BIOS-e820: 00000000bd6d8000 - 00000000bd6dc000 (ACPI NVS) > [ 0.000000] BIOS-e820: 00000000bd6dc000 - 00000000bd6df000 (reserved) > [ 0.000000] BIOS-e820: 00000000bd6df000 - 00000000bd706000 (ACPI NVS) > [ 0.000000] BIOS-e820: 00000000bd706000 - 00000000bd708000 (ACPI data) > [ 0.000000] BIOS-e820: 00000000bd708000 - 00000000bd90f000 (reserved) > [ 0.000000] BIOS-e820: 00000000bd90f000 - 00000000bd99f000 (ACPI NVS) > [ 0.000000] BIOS-e820: 00000000bd99f000 - 00000000bd9ff000 (ACPI data) > [ 0.000000] BIOS-e820: 00000000bd9ff000 - 00000000bda00000 (usable) > [ 0.000000] BIOS-e820: 00000000bdc00000 - 00000000c0000000 (reserved) > [ 0.000000] BIOS-e820: 00000000e0000000 - 00000000f0000000 (reserved) > [ 0.000000] BIOS-e820: 00000000fec00000 - 00000000fec10000 (reserved) > [ 0.000000] BIOS-e820: 00000000fed00000 - 00000000fed00400 (reserved) > [ 0.000000] BIOS-e820: 00000000fed10000 - 00000000fed14000 (reserved) > [ 0.000000] BIOS-e820: 00000000fed18000 - 00000000fed1a000 (reserved) > [ 0.000000] BIOS-e820: 00000000fed1c000 - 00000000fed90000 (reserved) > [ 0.000000] BIOS-e820: 00000000fee00000 - 00000000fee01000 (reserved) > [ 0.000000] BIOS-e820: 00000000ff800000 - 0000000100000000 (reserved) > [ 0.000000] BIOS-e820: 0000000100000000 - 000000013c000000 (usable) > > > > This is the e820 output WITH mem=4096m > > [ 0.000000] BIOS-provided physical RAM map: > [ 0.000000] BIOS-e820: 0000000000000000 - 000000000009ec00 (usable) > [ 0.000000] BIOS-e820: 000000000009ec00 - 00000000000a0000 (reserved) > [ 0.000000] BIOS-e820: 00000000000dc000 - 0000000000100000 (reserved) > [ 0.000000] BIOS-e820: 0000000000100000 - 00000000bd4a1000 (usable) > [ 0.000000] BIOS-e820: 00000000bd4a1000 - 00000000bd4a7000 (reserved) > [ 0.000000] BIOS-e820: 00000000bd4a7000 - 00000000bd5b8000 (usable) > [ 0.000000] BIOS-e820: 00000000bd5b8000 - 00000000bd60f000 (reserved) > [ 0.000000] BIOS-e820: 00000000bd60f000 - 00000000bd6c6000 (usable) > [ 0.000000] BIOS-e820: 00000000bd6c6000 - 00000000bd6d1000 (ACPI NVS) > [ 0.000000] BIOS-e820: 00000000bd6d1000 - 00000000bd6d4000 (ACPI data) > [ 0.000000] BIOS-e820: 00000000bd6d4000 - 00000000bd6d8000 (reserved) > [ 0.000000] BIOS-e820: 00000000bd6d8000 - 00000000bd6dc000 (ACPI NVS) > [ 0.000000] BIOS-e820: 00000000bd6dc000 - 00000000bd6df000 (reserved) > [ 0.000000] BIOS-e820: 00000000bd6df000 - 00000000bd706000 (ACPI NVS) > [ 0.000000] BIOS-e820: 00000000bd706000 - 00000000bd708000 (ACPI data) > [ 0.000000] BIOS-e820: 00000000bd708000 - 00000000bd90f000 (reserved) > [ 0.000000] BIOS-e820: 00000000bd90f000 - 00000000bd99f000 (ACPI NVS) > [ 0.000000] BIOS-e820: 00000000bd99f000 - 00000000bd9ff000 (ACPI data) > [ 0.000000] BIOS-e820: 00000000bd9ff000 - 00000000bda00000 (usable) > [ 0.000000] BIOS-e820: 00000000bdc00000 - 00000000c0000000 (reserved) > [ 0.000000] BIOS-e820: 00000000e0000000 - 00000000f0000000 (reserved) > [ 0.000000] BIOS-e820: 00000000fec00000 - 00000000fec10000 (reserved) > [ 0.000000] BIOS-e820: 00000000fed00000 - 00000000fed00400 (reserved) > [ 0.000000] BIOS-e820: 00000000fed10000 - 00000000fed14000 (reserved) > [ 0.000000] BIOS-e820: 00000000fed18000 - 00000000fed1a000 (reserved) > [ 0.000000] BIOS-e820: 00000000fed1c000 - 00000000fed90000 (reserved) > [ 0.000000] BIOS-e820: 00000000fee00000 - 00000000fee01000 (reserved) > [ 0.000000] BIOS-e820: 00000000ff800000 - 0000000100000000 (reserved) > [ 0.000000] BIOS-e820: 0000000100000000 - 000000013c000000 (usable) > [ 0.000000] NX (Execute Disable) protection: active > [ 0.000000] user-defined physical RAM map: > [ 0.000000] user: 0000000000000000 - 000000000009ec00 (usable) > [ 0.000000] user: 000000000009ec00 - 00000000000a0000 (reserved) > [ 0.000000] user: 00000000000dc000 - 0000000000100000 (reserved) > [ 0.000000] user: 0000000000100000 - 00000000bd4a1000 (usable) > [ 0.000000] user: 00000000bd4a1000 - 00000000bd4a7000 (reserved) > [ 0.000000] user: 00000000bd4a7000 - 00000000bd5b8000 (usable) > [ 0.000000] user: 00000000bd5b8000 - 00000000bd60f000 (reserved) > [ 0.000000] user: 00000000bd60f000 - 00000000bd6c6000 (usable) > [ 0.000000] user: 00000000bd6c6000 - 00000000bd6d1000 (ACPI NVS) > [ 0.000000] user: 00000000bd6d1000 - 00000000bd6d4000 (ACPI data) > [ 0.000000] user: 00000000bd6d4000 - 00000000bd6d8000 (reserved) > [ 0.000000] user: 00000000bd6d8000 - 00000000bd6dc000 (ACPI NVS) > [ 0.000000] user: 00000000bd6dc000 - 00000000bd6df000 (reserved) > [ 0.000000] user: 00000000bd6df000 - 00000000bd706000 (ACPI NVS) > [ 0.000000] user: 00000000bd706000 - 00000000bd708000 (ACPI data) > [ 0.000000] user: 00000000bd708000 - 00000000bd90f000 (reserved) > [ 0.000000] user: 00000000bd90f000 - 00000000bd99f000 (ACPI NVS) > [ 0.000000] user: 00000000bd99f000 - 00000000bd9ff000 (ACPI data) > [ 0.000000] user: 00000000bd9ff000 - 00000000bda00000 (usable) > [ 0.000000] user: 00000000bdc00000 - 00000000c0000000 (reserved) > [ 0.000000] user: 00000000e0000000 - 00000000f0000000 (reserved) > [ 0.000000] user: 00000000fec00000 - 00000000fec10000 (reserved) > [ 0.000000] user: 00000000fed00000 - 00000000fed00400 (reserved) > [ 0.000000] user: 00000000fed10000 - 00000000fed14000 (reserved) > [ 0.000000] user: 00000000fed18000 - 00000000fed1a000 (reserved) > [ 0.000000] user: 00000000fed1c000 - 00000000fed90000 (reserved) > [ 0.000000] user: 00000000fee00000 - 00000000fee01000 (reserved) > [ 0.000000] user: 00000000ff800000 - 0000000100000000 (reserved) > > So basically the BIOS is incorrectly reporting > BIOS-e820: 0000000100000000 - 000000013c000000 (usable) > > right? > > Thanks, > Pedro > (sorry for the spam) Actually this can't be right, because booting with mem=4096m only gives me 3047008 kb of usable memory, versus 3949684 kb without mem=4096m. Pedro -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
