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Date: Fri, 20 Mar 2015 14:38:20 +0100 From: Michal Hocko <mhocko@...e.cz> To: Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp> Cc: ying.huang@...el.com, hannes@...xchg.org, torvalds@...ux-foundation.org, rientjes@...gle.com, akpm@...ux-foundation.org, david@...morbit.com, linux-kernel@...r.kernel.org, lkp@...org, linux-mm@...ck.org Subject: Re: [LKP] [mm] cc87317726f: WARNING: CPU: 0 PID: 1atdrivers/iommu/io-pgtable-arm.c:413 __arm_lpae_unmap+0x341/0x380() On Fri 20-03-15 22:34:21, Tetsuo Handa wrote: > 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. I guess you meant __GFP_NOFAIL? -- Michal Hocko SUSE Labs -- 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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