From: David Rientjes <rientjes@google.com>
To: "R, Sricharan" <r.sricharan@ti.com>
Cc: linux-mm@kvack.org, Santosh Shilimkar <santosh.shilimkar@ti.com>,
linux-omap@vger.kernel.org
Subject: Re: Crash with VMALLOC api
Date: Sun, 24 Jun 2012 13:47:29 -0700 (PDT) [thread overview]
Message-ID: <alpine.DEB.2.00.1206241345060.13297@chino.kir.corp.google.com> (raw)
In-Reply-To: <CAJ7qFSdiGw1krDbWg6HvwBymp2gwrYKb8UuA00wSP0rgZi-EMw@mail.gmail.com>
On Sat, 23 Jun 2012, R, Sricharan wrote:
> Hi,
> I am observing a below crash with VMALLOC call on mainline kernel.
> The issue happens when there is insufficent vmalloc space.
> Isn't it expected that the API should return a NULL instead of crashing when
> there is not enough memory?.
Yes.
> This can be reproduced with succesive vmalloc
> calls for a size of about say 10MB, without a vfree, thus exhausting
> the memory.
>
> Strangely when vmalloc is requested for a large chunk, then at that time API
> does not crash instead returns a NULL correctly.
>
> Please correct me if my understanding is not correct..
>
> --------------------------------------------------------------------------------------
>
> [ 345.059841] Unable to handle kernel paging request at virtual
> address 90011000
> [ 345.067063] pgd = ebc34000
> [ 345.069793] [90011000] *pgd=00000000
> [ 345.073383] Internal error: Oops: 5 [#1] PREEMPT SMP ARM
> [ 345.078685] Modules linked in: bcmdhd cfg80211 inv_mpu_ak8975
> inv_mpu_kxtf9 mpu3050
> [ 345.086380] CPU: 0 Tainted: G W (3.4.0-rc1-05660-g0d4b175 #1)
> [ 345.093351] PC is at vmap_page_range_noflush+0xf0/0x200
> [ 345.098569] LR is at vmap_page_range+0x14/0x50
> [ 345.103005] pc : [<c01091c8>] lr : [<c01092ec>] psr: 80000013
> [ 345.103009] sp : ebc41e38 ip : fe000fff fp : 00002000
> [ 345.114472] r10: c0a78480 r9 : 90011000 r8 : c096e2ac
> [ 345.119685] r7 : 90011000 r6 : 00000000 r5 : fe000000 r4 : 00000000
> [ 345.126198] r3 : 50011452 r2 : f385c400 r1 : fe000fff r0 : f385c400
> [ 345.132713] Flags: Nzcv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user
> [ 345.139835] Control: 10c5387d Table: abc3404a DAC: 00000015
Couple requests:
- since you're already running an -rc kernel, would it be possible to
try 3.5-rc4, which was released today, instead?
- could you disassemble vmap_page_range_noflush and post the output or
map the offset back to the line in the code?
Thanks!
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next prev parent reply other threads:[~2012-06-24 20:47 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-23 5:58 R, Sricharan
2012-06-23 6:32 ` R, Sricharan
2012-06-24 20:47 ` David Rientjes [this message]
2012-06-25 17:23 ` R, Sricharan
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