linux-kernel - Re: [GIT PULL v3] Early boot SLAB for 2.6.31

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Date:	Thu, 11 Jun 2009 23:43:42 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Pekka J Enberg <penberg@...helsinki.fi>
Cc:	Yinghai Lu <yinghai@...nel.org>,
	Christoph Lameter <cl@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
	hannes@...xchg.org, mpm@...enic.com, npiggin@...e.de
Subject: Re: [GIT PULL v3] Early boot SLAB for 2.6.31


* Pekka J Enberg <penberg@...helsinki.fi> wrote:

> Hi Linus,
> 
> Here's third take on the early boot SLAB patches for 2.6.31. I 
> fixed the problems found by Ingo in his testing and rebased the 
> series to be bisectable. I have tested the tree on 32-bit UMA and 
> on x86-64 with qemu and Yanghai has tested them on NUMA+SLUB 
> (thanks Yanghai!). Note: The series has not been tested on non-x86 
> architectures so we may introduce some breakage there.

Latest -git now produces this boot warning on x86:

[    0.000000] Memory: 885032k/915540k available (5993k kernel code, 29844k reserved, 3842k data, 428k init, 0k highmem)
[    0.000000] virtual kernel memory layout:
[    0.000000]     fixmap  : 0xffe17000 - 0xfffff000   (1952 kB)
[    0.000000]     vmalloc : 0xf8615000 - 0xffe15000   ( 120 MB)
[    0.000000]     lowmem  : 0xc0000000 - 0xf7e15000   ( 894 MB)
[    0.000000]       .init : 0xc19a5000 - 0xc1a10000   ( 428 kB)
[    0.000000]       .data : 0xc15da4bb - 0xc199af6c   (3842 kB)
[    0.000000]       .text : 0xc1000000 - 0xc15da4bb   (5993 kB)
[    0.000000] Checking if this processor honours the WP bit even in supervisor mode...Ok.
[    0.000000] ------------[ cut here ]------------
[    0.000000] WARNING: at kernel/smp.c:369 smp_call_function_many+0x50/0x1b0()
[    0.000000] Hardware name: System Product Name
[    0.000000] Modules linked in:
[    0.000000] Pid: 0, comm: swapper Not tainted 2.6.30-tip #52504
[    0.000000] Call Trace:
[    0.000000]  [<c104aa16>] warn_slowpath_common+0x65/0x95
[    0.000000]  [<c104aa58>] warn_slowpath_null+0x12/0x15
[    0.000000]  [<c1073bbe>] smp_call_function_many+0x50/0x1b0
[    0.000000]  [<c1037615>] ? do_flush_tlb_all+0x0/0x41
[    0.000000]  [<c1037615>] ? do_flush_tlb_all+0x0/0x41
[    0.000000]  [<c1073d4f>] smp_call_function+0x31/0x58
[    0.000000]  [<c1037615>] ? do_flush_tlb_all+0x0/0x41
[    0.000000]  [<c104f635>] on_each_cpu+0x26/0x65
[    0.000000]  [<c10374b5>] flush_tlb_all+0x19/0x1b
[    0.000000]  [<c1032ab3>] zap_low_mappings+0x4d/0x56
[    0.000000]  [<c15d64b5>] ? printk+0x14/0x17
[    0.000000]  [<c19b42a8>] mem_init+0x23d/0x245
[    0.000000]  [<c19a56a1>] start_kernel+0x17a/0x2d5
[    0.000000]  [<c19a5347>] ? unknown_bootoption+0x0/0x19a
[    0.000000]  [<c19a5039>] __init_begin+0x39/0x41
[    0.000000] ---[ end trace 4eaa2a86a8e2da22 ]---
[    0.000000] ------------[ cut here ]------------
[    0.000000] WARNING: at kernel/lockdep.c:2128 trace_hardirqs_on_caller+0xc6/0x143()
[    0.000000] Hardware name: System Product Name
[    0.000000] Modules linked in:
[    0.000000] Pid: 0, comm: swapper Tainted: G        W  2.6.30-tip #52504
[    0.000000] Call Trace:
[    0.000000]  [<c104aa16>] warn_slowpath_common+0x65/0x95
[    0.000000]  [<c104f64b>] ? on_each_cpu+0x3c/0x65
[    0.000000]  [<c1037615>] ? do_flush_tlb_all+0x0/0x41
[    0.000000]  [<c104aa58>] warn_slowpath_null+0x12/0x15
[    0.000000]  [<c106c883>] trace_hardirqs_on_caller+0xc6/0x143
[    0.000000]  [<c106c90b>] trace_hardirqs_on+0xb/0xd
[    0.000000]  [<c104f64b>] on_each_cpu+0x3c/0x65
[    0.000000]  [<c10374b5>] flush_tlb_all+0x19/0x1b
[    0.000000]  [<c1032ab3>] zap_low_mappings+0x4d/0x56
[    0.000000]  [<c15d64b5>] ? printk+0x14/0x17
[    0.000000]  [<c19b42a8>] mem_init+0x23d/0x245
[    0.000000]  [<c19a56a1>] start_kernel+0x17a/0x2d5
[    0.000000]  [<c19a5347>] ? unknown_bootoption+0x0/0x19a
[    0.000000]  [<c19a5039>] __init_begin+0x39/0x41
[    0.000000] ---[ end trace 4eaa2a86a8e2da23 ]---
[    0.000000] SLUB: Genslabs=13, HWalign=64, Order=0-3, MinObjects=0, CPUs=2, Nodes=1
[    0.000000] start_kernel(): bug: interrupts were enabled *very* early, fixing it
[    0.000000] Preemptible RCU implementation.
[    0.000000] NR_IRQS:2304 nr_irqs:424
[    0.000000] Fast TSC calibration using PIT
[    0.000000] Detected 2010.509 MHz processor.
[    0.010000] spurious 8259A interrupt: IRQ7.
[    0.010000] Console: colour VGA+ 80x25
[    0.010000] console [tty0] enabled

config attached.

	Ingo

View attachment "config" of type "text/plain" (61183 bytes)