Date: Mon, 08 Oct 2007 15:30:41 +0200 From: =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= <des@des.no> To: Pawel Jakub Dawidek <pjd@FreeBSD.org> Cc: freebsd-fs@FreeBSD.org, freebsd-current@FreeBSD.org Subject: Re: ZFS kmem_map too small. Message-ID: <86bqb97mym.fsf@ds4.des.no> References: <20071005000046.GC92272@garage.freebsd.pl> <20071008121523.GM2327@garage.freebsd.pl>
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Pawel Jakub Dawidek <pjd@FreeBSD.org> writes:
> I'm not sure if it's not too late to ask re@ about increasing the
> default kmem size at least on amd64. ~300MB we have there is silly
> small.
Speaking of which, I tried setting vm.kmem_size to 2G on a C2D system
with 4 GB RAM, but it simply panics:
OK set vm.kmem_size=3D2G
OK boot -s
GDB: no debug ports present
KDB: debugger backends: ddb
KDB: current backend: ddb
Copyright (c) 1992-2007 The FreeBSD Project.
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The Regents of the University of California. All rights reserved.
FreeBSD is a registered trademark of The FreeBSD Foundation.
FreeBSD 7.0-CURRENT #8: Tue Sep 25 13:31:41 CEST 2007
des@ds4.des.no:/usr/obj/usr/src/sys/ds4
kmem_suballoc: bad status return of 3.
panic: kmem_suballoc
cpuid =3D 0
KDB: enter: panic
[thread pid 0 tid 0 ]
Stopped at kdb_enter+0x31: popq %rbp
db> where
Tracing pid 0 tid 0 td 0xffffffff805af4a0
kdb_enter() at kdb_enter+0x31
panic() at panic+0x166
kmem_suballoc() at kmem_suballoc+0xc3
kmeminit() at kmeminit+0x16e
mi_startup() at mi_startup+0x59
btext() at btext+0x2c
db> reset
with vm.kmem_size unset and vm.kmem_size_max=3D2G, it boots fine:
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: Intel(R) Core(TM)2 CPU 6600 @ 2.40GHz (2400.01-MHz K8-class =
CPU)
Origin =3D "GenuineIntel" Id =3D 0x6f6 Stepping =3D 6
Features=3D0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PG=
E,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
Features2=3D0xe3bd<SSE3,RSVD2,MON,DS_CPL,VMX,EST,TM2,SSSE3,CX16,xTPR,PDCM>
AMD Features=3D0x20100800<SYSCALL,NX,LM>
AMD Features2=3D0x1<LAHF>
Cores per package: 2
usable memory =3D 4286398464 (4087 MB)
avail memory =3D 4130979840 (3939 MB)
ACPI APIC Table: <GBT GBTUACPI>
FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
cpu0 (BSP): APIC ID: 0
cpu1 (AP): APIC ID: 1
ioapic0: Changing APIC ID to 2
ioapic0 <Version 2.0> irqs 0-23 on motherboard
[...]
DES
--=20
Dag-Erling Sm=C3=B8rgrav - des@des.no
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