From: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
To: ying.huang@intel.com
Cc: hannes@cmpxchg.org, torvalds@linux-foundation.org,
mhocko@suse.cz, rientjes@google.com, akpm@linux-foundation.org,
david@fromorbit.com, linux-kernel@vger.kernel.org, lkp@01.org,
linux-mm@kvack.org
Subject: Re: [LKP] [mm] cc87317726f: WARNING: CPU: 0 PID: 1atdrivers/iommu/io-pgtable-arm.c:413 __arm_lpae_unmap+0x341/0x380()
Date: Fri, 20 Mar 2015 22:34:21 +0900 [thread overview]
Message-ID: <201503202234.HIA00180.MQVLSFFtHOOFJO@I-love.SAKURA.ne.jp> (raw)
In-Reply-To: <1426730222.5570.41.camel@intel.com>
Huang Ying wrote:
> > > BTW: the test is run on 32 bit system.
> >
> > That sounds like the cause of your problem. The system might be out of
> > address space available for the kernel (only 1GB if x86_32). You should
> > try running tests on 64 bit systems.
>
> We run test on 32 bit and 64 bit systems. Try to catch problems on both
> platforms. I think we still need to support 32 bit systems?
Yes, testing on both platforms is good. But please read
http://lwn.net/Articles/627419/ , http://lwn.net/Articles/635354/ and
http://lwn.net/Articles/636017/ . Then please add __GFP_NORETRY to memory
allocations in btrfs code if it is appropriate.
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next prev parent reply other threads:[~2015-03-20 13:34 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1426227621.6711.238.camel@intel.com>
2015-03-17 17:15 ` [LKP] [mm] cc87317726f: WARNING: CPU: 0 PID: 1 at drivers/iommu/io-pgtable-arm.c:413 __arm_lpae_unmap+0x341/0x380() Linus Torvalds
2015-03-17 17:28 ` Michal Hocko
2015-03-17 19:24 ` Johannes Weiner
2015-03-18 1:53 ` Huang Ying
2015-03-18 11:45 ` [LKP] [mm] cc87317726f: WARNING: CPU: 0 PID: 1 atdrivers/iommu/io-pgtable-arm.c:413 __arm_lpae_unmap+0x341/0x380() Tetsuo Handa
2015-03-19 1:57 ` Huang Ying
2015-03-20 13:34 ` Tetsuo Handa [this message]
2015-03-20 13:38 ` [LKP] [mm] cc87317726f: WARNING: CPU: 0 PID: 1atdrivers/iommu/io-pgtable-arm.c:413 __arm_lpae_unmap+0x341/0x380() Michal Hocko
2015-03-20 14:02 ` [LKP] [mm] cc87317726f: WARNING: CPU: 0 PID:1atdrivers/iommu/io-pgtable-arm.c:413 __arm_lpae_unmap+0x341/0x380() Tetsuo Handa
2015-03-20 14:34 ` Michal Hocko
2015-03-20 15:41 ` [LKP] [mm] cc87317726f: WARNING: CPU: 0 PID: 1 at drivers/iommu/io-pgtable-arm.c:413 __arm_lpae_unmap+0x341/0x380() Tetsuo Handa
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