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Date: Tue, 9 Nov 2010 17:01:20 +1100
Message-ID: <AANLkTi=nDY25GNpV=XVum0Cbg1tjX14v-fcA2K6NrhgW@mail.gmail.com>
Subject: Re: 2.6.37-rc1 kmemleak warnings when saving a file over cifs.
From: Andrew Hendry <andrew.hendry@gmail.com>
To: Steve French <smfrench@gmail.com>
Cc: linux-kernel <linux-kernel@vger.kernel.org>, linux-cifs@vger.kernel.org
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The server is a qnap NAS, running linux 2.6.24

On Tue, Nov 9, 2010 at 3:12 PM, Steve French <smfrench@gmail.com> wrote:
> On Mon, Nov 8, 2010 at 6:13 PM, Andrew Hendry <andrew.hendry@gmail.com> wrote:
>> Have just noticed these in the past few days, now running 2.6.37-rc1+
>> Seems to be 1 logged per file save when using a text file with gedit over cifs.
>
> Can you tell the called function in cifs_setattr_unix vs. cifs_setattr_nounix
> (the former will usually be called when the server is Samba, the latter
> when the server is Windows or NetApp). ?What is the server type?
>
>> unreferenced object 0xffff88022ee08b40 (size 32):
>> ?comm "gedit", pid 2524, jiffies 4300160388 (age 2633.655s)
>> ?hex dump (first 32 bytes):
>> ? ?5c 2e 67 6f 75 74 70 75 74 73 74 72 65 61 6d 2d ?\.goutputstream-
>> ? ?35 42 41 53 4c 56 00 de 09 00 00 00 2c 26 78 ee ?5BASLV......,&x.
>> ?backtrace:
>> ? ?[<ffffffff81504a4d>] kmemleak_alloc+0x2d/0x60
>> ? ?[<ffffffff81136e13>] __kmalloc+0xe3/0x1d0
>> ? ?[<ffffffffa0313db0>] build_path_from_dentry+0xf0/0x230 [cifs]
>> ? ?[<ffffffffa031ae1e>] cifs_setattr+0x9e/0x770 [cifs]
>> ? ?[<ffffffff8115fe90>] notify_change+0x170/0x2e0
>> ? ?[<ffffffff81145ceb>] sys_fchmod+0x10b/0x140
>> ? ?[<ffffffff8100c172>] system_call_fastpath+0x16/0x1b
>> ? ?[<ffffffffffffffff>] 0xffffffffffffffff
>
> Didn't see anything obvious in cifs_setattr_unix on the kmalloc/kfree
> of full_path,
> but it will help when we know which path we are in. ?We did make some recent
> changes in 2.6.37 in file allocation.
>
> --
> Thanks,
>
> Steve
>
--
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