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Wed, 01 May 2019 22:21:20 -0700 (PDT) From: "Valdis Kl=?utf-8?Q?=c4=93?=tnieks" X-Google-Original-From: "Valdis Kl=?utf-8?Q?=c4=93?=tnieks" X-Mailer: exmh version 2.9.0 11/07/2018 with nmh-1.7+dev To: Pankaj Suryawanshi Subject: Re: Page Allocation Failure and Page allocation stalls In-Reply-To: References: Mime-Version: 1.0 Date: Thu, 02 May 2019 01:21:19 -0400 Message-ID: <11029.1556774479@turing-police> Cc: minchan@kernel.org, kernelnewbies@kernelnewbies.org, linux-kernel@vger.kernel.org, Michal Hocko , linux-mm@kvack.org, Vlastimil Babka X-BeenThere: kernelnewbies@kernelnewbies.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Learn about the Linux kernel List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============5821831003934794439==" Errors-To: kernelnewbies-bounces+kernelnewbies=archiver.kernel.org@kernelnewbies.org --===============5821831003934794439== Content-Type: multipart/signed; boundary="==_Exmh_1556774478_11736P"; micalg=pgp-sha1; protocol="application/pgp-signature" Content-Transfer-Encoding: 7bit --==_Exmh_1556774478_11736P Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable On Thu, 02 May 2019 04:56:05 +0530, Pankaj Suryawanshi said: > Please help me to decode the error messages and reason for this errors.= > =5B 3205.818891=5D HwBinder:1894_6: page allocation failure: order:7, m= ode:0x14040c0(GFP_KERNEL=7C__GFP_COMP), nodemask=3D(null) Order 7 - so it wants 2**7 contiguous pages. 128 4K pages. > =5B 3205.967748=5D =5B<802186cc>=5D (__alloc_from_contiguous) from =5B<= 80218854>=5D (cma_allocator_alloc+0x44/0x4c) And that 3205.nnn tells me the system has been running for almost an hour= . Going to be hard finding that much contiguous free memory. Usually CMA is called right at boot to avoid this problem - why is this triggering so late? > =5B =A0671.925663=5D kworker/u8:13: page allocation stalls for 10090ms,= order:1, mode:0x15080c0(GFP_KERNEL_ACCOUNT=7C__GFP_ZERO), nodemask=3D(nu= ll) That's.... a *really* long stall. > =5B =A0672.031702=5D =5B<8021e800>=5D (copy_process.part.5) from =5B<80= 2203b0>=5D (_do_fork+0xd0/0x464) > =5B =A0672.039617=5D =A0r10:00000000 r9:00000000 r8:9d008400 r7:0000000= 0 r6:81216588 r5:9b62f840 > =5B =A0672.047441=5D =A0r4:00808111 > =5B =A0672.049972=5D =5B<802202e0>=5D (_do_fork) from =5B<802207a4>=5D = (kernel_thread+0x38/0x40) > =5B =A0672.057281=5D =A0r10:00000000 r9:81422554 r8:9d008400 r7:0000000= 0 r6:9d004500 r5:9b62f840 > =5B =A0672.065105=5D =A0r4:81216588 > =5B =A0672.067642=5D =5B<8022076c>=5D (kernel_thread) from =5B<802399b4= >=5D (call_usermodehelper_exec_work+0x44/0xe0) First possibility that comes to mind is that a usermodehelper got launche= d, 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? --==_Exmh_1556774478_11736P Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Comment: Exmh version 2.9.0 11/07/2018 iQIVAwUBXMp+TQdmEQWDXROgAQJZqxAAnxreoU88EHeovAeSkoiTH8XPfW74dkjJ YUtiENuZTAiZBz+nMedbFkKpbNYb0eZWoJ8DMZQKhJ4ausU1uXhFT5NKVOZySX8P a4vnlAABdw4n2n3weAVGTx/Drvr0wHgrwhZAQRCKDwXmmnRn91RUsX5expYmHRIg /h6zZU+CLp0fWQZzUEsstUpV3ExUc/+3/5Jd+/0e0gWtCuK0Sbl7iCnb9TrG6xLW 7repzilTRzOYrGg9wSpT+FpmHJUoWfhW8Dn02tT0fflVBOlrs9JeFZituXv2+Zos 7BSoo1QrTYH5l2tQmIqKvkP7DZvwK1tYPcNSzlkISPS6+WcV/pd4YF1E+sPKi1j/ t3k7pUR76UrQ/yGqnqQyzfHZSYjRDdpeA4G3NBymrwUe7kVvGiUeIdGJ43QhHFnp 4jBOcR1gmDMkML9sW17pJgYAT5LLrVEonBIEYkje8niIG4D2KJWVjaUryefON33K 6/GFJGXHpaeT9ZENYEnfjB6viGeMresPs6pky4m1+XgqjZ4DHc6Gpat0gNzEUHid wez5Zt4HCSgtifjdycsEyg7Bd4fYkXih/5+5MKwo0djvFT/PeervNyV896+quAP3 rswghjdziQRts67CakcgNs2+7HGyBAobpJDmr1Be/aWN6bMndk8m8CxENv2yL95p ZYh7SZH5Y28= =GETR -----END PGP SIGNATURE----- --==_Exmh_1556774478_11736P-- --===============5821831003934794439== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies --===============5821831003934794439==--