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Date: Thu, 22 Apr 2010 04:08:46 +0800 From: ye janboe <janboe.ye@...il.com> To: naveen yadav <yad.naveen@...il.com> Cc: Vegard Nossum <vegard.nossum@...il.com>, linux-arm-kernel-request@...ts.arm.linux.org.uk, linux newbie <linux.newbie79@...il.com>, linux-kernel@...r.kernel.org, Catalin Marinas <catalin.marinas@....com> Subject: Re: Kmemcheck issue hi, Naveen Since kmemcheck is slow on arm which lack hw singlestep, I do not plan to maintain this patch. If you want to check slab error, please try kmudflap I posted in the mail list. Janboe 2010/4/20 naveen yadav <yad.naveen@...il.com>: > Hi Vegard, > > Thanks for your answer, but this is coming from kmemchek only > > thanks > naveen > On Tue, Apr 20, 2010 at 1:31 PM, Vegard Nossum <vegard.nossum@...il.com> wrote: >> On 19 April 2010 15:23, naveen yadav <yad.naveen@...il.com> wrote: >>> Hi, >>> >>> á á á I áam átrying to á run áKmemcheck on á a áCortex ( ARM-v7) >>> board árunning áLinux 2.6.30.9 >>> >>> At boot-up time, áas ásoon áas áTimer-device is áenabled, á I áfind >>> that á timer ágets ádisabled ábecause ásystem >>> gets spurious áinterrupts áon áthat áirq áline. >>> >>> >>> PID hash table entries: 1024 (order: 10, 4096 bytes) >>> Linux System timer initialize >>> irq 23: nobody cared (try booting with the "irqpoll" option) >>> [<c002e148>] (unwind_backtrace+0x0/0xe8) from [<c002c4b8>] >>> (dump_stack+0x18/0x1c) >>> [<c002c4b8>] (dump_stack+0x18/0x1c) from [<c006ad74>] >>> (__report_bad_irq+0x80/0xb0) >>> [<c006ad74>] (__report_bad_irq+0x80/0xb0) from [<c006af28>] >>> (note_interrupt+0x184/0x1f0) >>> [<c006af28>] (note_interrupt+0x184/0x1f0) from [<c006ba38>] >>> (handle_edge_irq+0xe8/0x160) >>> [<c006ba38>] (handle_edge_irq+0xe8/0x160) from [<c0027060>] >>> (asm_do_IRQ+0x60/0x74) >>> [<c0027060>] (asm_do_IRQ+0x60/0x74) from [<c0027a30>] (__irq_svc+0x30/0x80) >>> Exception stack(0xc0373ec0 to 0xc0373f08) >>> 3ec0: 00000017 c0372000 00000002 00000000 00000002 c038e8f4 00000000 0aa00000 >>> 3ee0: c0372000 c03bfc40 0000001f c0373f44 00000100 c0373f08 c0047ffc c0047c98 >>> 3f00: 20000153 ffffffff >>> [<c0027a30>] (__irq_svc+0x30/0x80) from [<c0047ffc>] (irq_exit+0x44/0x4c) >>> [<c0047ffc>] (irq_exit+0x44/0x4c) from [<c0047ffc>] (irq_exit+0x44/0x4c) >>> [<c0047ffc>] (irq_exit+0x44/0x4c) from [<c0027064>] (asm_do_IRQ+0x64/0x74) >>> [<c0027064>] (asm_do_IRQ+0x64/0x74) from [<c0027a30>] (__irq_svc+0x30/0x80) >>> Exception stack(0xc0373f78 to 0xc0373fc0) >>> 3f60: á á á á á á á á á á á á á á á á á á á á á á á á á á á 00000000 c037c15c >>> 3f80: 00000001 600001d3 955fffff c00242ec c0399f80 0aa00000 c0023000 412fc082 >>> 3fa0: 0000001f c0373ff4 c0373fc0 c0373fc0 c0008974 c0019798 20000153 ffffffff >>> [<c0027a30>] (__irq_svc+0x30/0x80) from [<c0008974>] (start_kernel+0x168/0x3e4) >>> [<c0008974>] (start_kernel+0x168/0x3e4) from [<60008034>] (0x60008034) >>> handlers: >>> [<c003a604>] (sdp_timer_interrupt+0x0/0x38) >>> Disabling IRQ #23 >>> Console: colour dummy device 80x30 >>> console [ttyS1] enabled >>> Dentry cache hash table entries: 32768 (order: 5, 131072 bytes) >>> Inode-cache hash table entries: 16384 (order: 4, 65536 bytes) >>> >>> >>> Later, áwhen ácalibrating delay áloop, áthe system is hung áas timer >>> is not working. >>> >>> The problem happens áeven if áI áset kmemcheck_enabled = 0 at áboot. >>> ( I also commented out á á pagetable_init(&meminfo) á). >>> >>> áIf áyou have seen this before, áplease let me know. >>> >>> ( I know that áyour patch was written for á ARM v6. á á My cpu is >>> Cortex . á áI am aware that áI may have to make some change in the >>> áinstruction simulation handling. ) >>> >>> Thanks >> >> Hi, >> >> First up, I see a lot of funny á characters in your text. >> >> I think that this is not about kmemcheck, but kmemleak. kmemcheck is >> for catching references to uninitialized memory while kmemleak is for >> detecting memory leaks. kmemcheck only works on x86 so far (with an >> ARM patch by Ye Janboe, but it is not in mainline). kmemleak, however, >> was written on ARM. >> >> I put Catalin Marinas (kmemleak author) on Cc. >> >> Please correct me if I am wrong. Good luck. >> >> >> Vegard >> > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@...r.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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