Messages in this thread | | | Date | Fri, 31 Oct 2008 16:19:29 -0700 | From | Yinghai Lu <> | Subject | Re: PAT and MTRRs |
| |
Diego M. Vadell wrote: >> can you try 2.6.28-rc2 ot tip/master and boot with mtrr_cleanup_debug ? >> >> YH > > Hello, > Thank you very much and sorry for the delay. This is a remote site and I > have to travel to get here. > > I upgradedt to 2.6.28-rc2 but the problem persists. Here is the > (hopefully) relevant part of dmesg: > > BIOS EBDA/lowmem at: 0009fc00/0009fc00 > Linux version 2.6.28-rc2 (root@compute-0-5.local) (gcc version 3.4.6 > 20060404 (Red Hat 3.4.6-8)) > #1 SMP Fri Oct 31 18:01:52 ART 2008 > Command line: ro root=LABEL=/ mtrr_cleanup_debug > KERNEL supported cpus: > Intel GenuineIntel > AMD AuthenticAMD > Centaur CentaurHauls > BIOS-provided physical RAM map: > BIOS-e820: 0000000000000000 - 000000000008f000 (usable) > BIOS-e820: 000000000008f000 - 00000000000a0000 (reserved) > BIOS-e820: 00000000000e0000 - 0000000000100000 (reserved) > BIOS-e820: 0000000000100000 - 00000000cf561000 (usable) > BIOS-e820: 00000000cf561000 - 00000000cf56e000 (reserved) > BIOS-e820: 00000000cf56e000 - 00000000cf612000 (usable) > BIOS-e820: 00000000cf612000 - 00000000cf6e9000 (ACPI NVS) > BIOS-e820: 00000000cf6e9000 - 00000000cf6ed000 (usable) > BIOS-e820: 00000000cf6ed000 - 00000000cf6f2000 (ACPI data) > BIOS-e820: 00000000cf6f2000 - 00000000cf6f3000 (usable) > BIOS-e820: 00000000cf6f3000 - 00000000cf6ff000 (ACPI data) > BIOS-e820: 00000000cf6ff000 - 00000000cf700000 (usable) > BIOS-e820: 00000000cf700000 - 00000000d0000000 (reserved) > BIOS-e820: 00000000fff00000 - 0000000100000000 (reserved) > BIOS-e820: 0000000100000000 - 000000012c000000 (usable) > DMI 2.4 present. > last_pfn = 0x12c000 max_arch_pfn = 0x3ffffffff > x86 PAT enabled: cpu 0, old 0x7040600070406, new 0x7010600070106 > After WB checking > MTRR MAP PFN: 0000000000000000 - 00000000000d0000 > After UC checking > MTRR MAP PFN: 0000000000000000 - 00000000000cf700 > After sorting > MTRR MAP PFN: 0000000000000000 - 00000000000cf700 > WARNING: BIOS bug: CPU MTRRs don't cover all of memory, losing 704MB of RAM. > ------------[ cut here ]------------ > WARNING: at arch/x86/kernel/cpu/mtrr/main.c:1662 > mtrr_trim_uncached_memory+0x331/0x358() > Modules linked in: > Pid: 0, comm: swapper Not tainted 2.6.28-rc2 #1 > Call Trace: > [<ffffffff80232c63>] warn_on_slowpath+0x51/0x6d > [<ffffffff80233b5f>] printk+0x8d/0x95 > [<ffffffff80306735>] generic_swap+0x0/0x19 > [<ffffffff8060a92e>] cmp_range+0x0/0x6 > [<ffffffff8060b4f0>] mtrr_trim_uncached_memory+0x331/0x358 > [<ffffffff803efcf7>] dmi_table+0x6f/0x96 > [<ffffffff80621aa3>] dmi_decode+0x0/0x4ab > [<ffffffff806072a8>] setup_arch+0x3f9/0x63c > [<ffffffff8060083c>] start_kernel+0x6a/0x307 > [<ffffffff806003a1>] x86_64_start_kernel+0xef/0xf3 > ---[ end trace 4eaa2a86a8e2da22 ]--- > update e820 for mtrr > modified physical RAM map: > modified: 0000000000000000 - 000000000008f000 (usable) > modified: 000000000008f000 - 00000000000a0000 (reserved) > modified: 00000000000e0000 - 0000000000100000 (reserved) > modified: 0000000000100000 - 00000000cf561000 (usable) > modified: 00000000cf561000 - 00000000cf56e000 (reserved) > modified: 00000000cf56e000 - 00000000cf612000 (usable) > modified: 00000000cf612000 - 00000000cf6e9000 (ACPI NVS) > modified: 00000000cf6e9000 - 00000000cf6ed000 (usable) > modified: 00000000cf6ed000 - 00000000cf6f2000 (ACPI data) > modified: 00000000cf6f2000 - 00000000cf6f3000 (usable) > modified: 00000000cf6f3000 - 00000000cf6ff000 (ACPI data) > modified: 00000000cf6ff000 - 00000000cf700000 (usable) > modified: 00000000cf700000 - 00000000d0000000 (reserved) > modified: 00000000fff00000 - 000000012c000000 (reserved) > last_pfn = 0xcf700 max_arch_pfn = 0x3ffffffff
do you have
# grep MTRR .config CONFIG_MTRR=y CONFIG_MTRR_SANITIZER=y CONFIG_MTRR_SANITIZER_ENABLE_DEFAULT=1 CONFIG_MTRR_SANITIZER_SPARE_REG_NR_DEFAULT=1
in your config files..
it seems mtrr_cleanup is not triggered...
also please put debug in your boot command line. like ro root=LABEL=/ mtrr_cleanup_debug debug
YH
| |