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From: Vlastimil Babka <vbabka@suse.cz>
To: "Pankaj Suryawanshi" <pankajssuryawanshi@gmail.com>,
	"Valdis Klētnieks" <valdis.kletnieks@vt.edu>
Cc: linux-mm@kvack.org, minchan@kernel.org,
	Michal Hocko <mhocko@kernel.org>,
	linux-kernel@vger.kernel.org, kernelnewbies@kernelnewbies.org
Subject: Re: Page Allocation Failure and Page allocation stalls
Date: Mon, 6 May 2019 11:05:26 +0200
Message-ID: <26e83e08-3249-e73f-2049-f36b44af8d8a@suse.cz> (raw)
In-Reply-To: <CACDBo54xXk-68MTsxw2K12gD0eGO0Xpq0rw60E3AX+2OEi3igw@mail.gmail.com>

On 5/3/19 7:44 PM, Pankaj Suryawanshi wrote:
>> First possibility that comes to mind is that a usermodehelper got launched, and
>> it then tried to fork with a very large active process image.  Do we have any
>> clues what was going on?  Did a device get hotplugged?
> 
> Yes,The system is android and it tries to allocate memory for video
> player from CMA reserved memory using custom octl call for dma apis.

The stacktrace doesn't look like a CMA allocation though. That would be
doing alloc_contig_range(), not kmalloc(). Could be some CMA area setup
issue?

> Please let me know how to overcome this issues, or how to reduce
> fragmentation of memory so that higher order allocation get suuceed ?
> 
> Thanks
> 


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Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-01 23:26 Pankaj Suryawanshi
2019-05-02  5:21 ` Valdis Klētnieks
2019-05-03 17:44   ` Pankaj Suryawanshi
2019-05-06  9:05     ` Vlastimil Babka [this message]
2019-05-09 16:47       ` Pankaj Suryawanshi

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