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Thu, 12 Nov 2020 08:10:34 +0000 (GMT) From: Marek Szyprowski Subject: Re: [patch V3 10/37] ARM: highmem: Switch to generic kmap atomic To: Thomas Gleixner , LKML Message-ID: Date: Thu, 12 Nov 2020 09:10:34 +0100 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.4.1 MIME-Version: 1.0 In-Reply-To: <20201103095857.582196476@linutronix.de> Content-Transfer-Encoding: 8bit Content-Language: en-US X-Brightmail-Tracker: H4sIAAAAAAAAA01Te0xTZxzdd58tWnIBJx9gtliUBLehbNN9ic5oYuI1MxuLWbKYkFrmDbjx SitOINlAkPESTUFWSnlNCC3lMS/PyLsOKiBlUGQIDGxgSHjoVodMsGXQqxv/nXN+53y/8/vj E+HuVspbdCHyIqeIlIdLKReiofuF+T37UqXsQKMWQw/GijGkramkkF3VTaPb6hoS5Q6qcLQ0 1Uwi7UAygYaXn1JIb+jCUE7uFYD46RESDU3raNRQloyhltYeAlnuaCmUxtcDNFm5TqKrE1UY 0vdX0ch4sxWgtRUHibKfzAJkcPQCtJKVRSJb6XMCma51YOjaTBaG2lIfYSihR0eiGr4IR7X8 TRwV9FXTaMBuIlF5fyGF/vl5mjzmy14dslOsZWQQZ9dWVYCt0z/E2OS2MZqt1e1j+Yo0iuVt Kpp9YjbT7D31GsHOdTbibHtBJc1OZZgwtrb0ezZ7tBywA+oSELTzrMuR81z4hUucYv/Rcy5h jhuZIDrH4/LgeBpIAH1MOhCLIPMhNHUX0OnAReTO6ADUFufgAvkbwHq1FhPIMwAXMyz460hz k40SBuUAlk40EQJ5CuCj0lZi00UxgTB9KZ3axB7MKdjaoXOmdzCfwdmk604PzuSJYaI+bBNL mKOwOWfK6SGYvfDecLrT8yYTAhPvJlGCxw325M04dTFzED7svI4L77wNk+rzX2FPODZT5KwN mUUXOD7fAoTaJ2DeZDsmYA84b6qjBbwL9mVnEkIgCUCruYoWSCaAlivqV+nDcMK8ulFDtLHC H9bc2S/Ix6G1dIXelCHjCkeX3IQSrlDV8CMuyBKYmuIuuP2gxlT939rOX4fwG0Cq2XKaZss5 mi3naP7fWwyICuDJxSgjQjllYCT3bYBSHqGMiQwN+Coqggcbv6DPYbI1gYL5vwKMABMBI4Ai XLpD4nusUuYuOS+PjeMUUTJFTDinNAIfESH1lFTkb4yYUPlF7huOi+YUr6eYSOydgBFiSXWE ZUFr7c01LGfaqjte7M2zei88eEcReGLOcms51Td1eXWm4KdeXv9+fnFJ3Nc/xPt4eUZZtt/O g2PQQJ3zm9jlH/eukjB+nPjW8cbx+3zLqceT/JpH4Sd/ZvMmfeKlaNlJx4GEzp0hwXYvn/WZ IynbAv13373stmALXv6oqyWxnOwYbow8+UtbEG3cI3sZpxPXH/J7o7mwoSuBBOTzWxHbu0YM rf3r24oaix4f/K7sjzM5u0Oe+YSc/aDf4LY+yzSk/H7YrS5Dbe38NF4ZoCH4Cl2wbS7V0O5Z plb9Js13zSrpD1r83Msedyj6y8XQtVEuNvYLzWr8y/unZQ6zlFCGyQP34Qql/F8F4KeXdAQA AA== X-Brightmail-Tracker: H4sIAAAAAAAAA02Sa0ybVRiAPd+tBa1+lCInzIWlExc3KRQoHnCSJVvc54VsmphsbrMr7AsQ abu1ZRleQp2MjDouK9d1FKgOKaPAaMdEEBjoBgiMFLBKQdG1Elwsm5CxKVCEggn/nrzned7k JC8X58+TIdw0hYZVKWTpQsqfGPD2/hK+5LFII7sHIfrRWY2hiiYLhZb1tzmoubyJRKV2PY48 U+0kqhjOJtDYw/sUqqu/haHi0rMAWV0OEo24zBx0oyYbQ9929BNotK2CQrnWFoB+tayQ6Nxk A4bqhho4qKekA6DFR14SFc1OA1Tv/QGgR/n5JJq7skCg3rybGMpz52Oo8/xvGNL2m0nUZK3C kc1agiPjQCMHDS/3kqh2qJJCj6+5yD3bmXMjyxQz6rDjzOK/esBcrxvHmOxOJ4exmXcy1qu5 FGOd03OY2Tt3OExf+SLBzHR/jTNdRguHmfq8F2NsV7KYop9rATNcbgIHn31PtFulzNCw21KV as2rwiNiFCUSxyFRVEycSBz98rH4KIkwImH3CTY97TSrikg4Lkr1Fl4AJ4sDz9gncoEWDNA6 4MeFdAxsb52jdMCfy6drACydXKLWH56D/aVacp0D4ZJDtyF5ADQ1TfskihZDnUfn40D6ddhx 04yvsYBOhGfzqsm1AKeNfvCLFYNP4tNS6Bh2+Lby6ATYXjzlCwg6DPaN6Yg1DqKTYI5lGaw7 AbD/kts396MlcLy7wOfjdCystP2+waHws5bLGxwMne4qrBDwDZtyw6bEsCkxbEqqAXEVCNgM tTxFrhaL1DK5OkORIkpWyq1g9fpu3P7H1goq7/0t6gEYF/QAyMWFAt72PRYpn3dClvkhq1JK VRnprLoHSFb/cxEPCUpWrp6vQiMVx0ZKxDGxcZGSuNhoYTCvxbga0SkyDfsBy55kVf93GNcv RItpjr4W0TacaT/Q3FWUOX/YspWfc/FLavR+kHdv6wVQa7v2Vu3MwnjYZMHK+DttS5YtGkIf n1fxoD24zHk3ybHwdmNEuPn9xleGFKfcl0MdYccEgp+sn9w6c3Bqx4s18tBw7LH+3Y8O8Mfc dODpsInjLYnoiGluiytAsEPVV7Y3R2udHey0J34TX+KvMGif2L+U53ljkDhEsQV9L5z/o+HB p8Fbgx+mPO1Qf9/8UuclZdpk0UhWzq7rTxZPH733XepTHUmHF6pMmpkxRBcPvem4uwj/zLJ1 saZdftHJDc/8FTDP+9g7Mfp8ZWHoNlPbvn1FESX+s4dcxvavpirE9WWnJCrWKSTUqTLxTlyl lv0HmCntXQYEAAA= X-CMS-MailID: 20201112081036eucas1p14e135a370d3bccab311727fd2e89f4df X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" X-RootMTR: 20201112081036eucas1p14e135a370d3bccab311727fd2e89f4df X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20201112081036eucas1p14e135a370d3bccab311727fd2e89f4df References: <20201103092712.714480842@linutronix.de> <20201103095857.582196476@linutronix.de> X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-aio@kvack.org, Peter Zijlstra , nouveau@lists.freedesktop.org, Sebastian Andrzej Siewior , dri-devel@lists.freedesktop.org, virtualization@lists.linux-foundation.org, linux-mm@kvack.org, Huang Rui , sparclinux@vger.kernel.org, Ingo Molnar , Paul McKenney , x86@kernel.org, Russell King , linux-csky@vger.kernel.org, Christoph Hellwig , Mel Gorman , Dave Airlie , linux-snps-arc@lists.infradead.org, linux-xtensa@linux-xtensa.org, Arnd Bergmann , Bartlomiej Zolnierkiewicz , Steven Rostedt , Linus Torvalds , Alexander Viro , spice-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-mips@vger.kernel.org, "David S. Miller" , linux-fsdevel@vger.kernel.org, Andrew Morton , linuxppc-dev@lists.ozlabs.org, Christian Koenig , linux-btrfs@vger.kernel.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" Hi Thomas, On 03.11.2020 10:27, Thomas Gleixner wrote: > No reason having the same code in every architecture. > > Signed-off-by: Thomas Gleixner > Cc: Russell King > Cc: Arnd Bergmann > Cc: linux-arm-kernel@lists.infradead.org This patch landed in linux-next 20201109 as commit 2a15ba82fa6c ("ARM: highmem: Switch to generic kmap atomic"). However it causes a following warning on my test boards (Samsung Exynos SoC based): Run /sbin/init as init process INIT: version 2.88 booting ------------[ cut here ]------------ WARNING: CPU: 3 PID: 120 at mm/highmem.c:502 kunmap_local_indexed+0x194/0x1d0 Modules linked in: CPU: 3 PID: 120 Comm: init Not tainted 5.10.0-rc2-00010-g2a15ba82fa6c #1924 Hardware name: Samsung Exynos (Flattened Device Tree) [] (unwind_backtrace) from [] (show_stack+0x10/0x14) [] (show_stack) from [] (dump_stack+0xb4/0xd4) [] (dump_stack) from [] (__warn+0x98/0x104) [] (__warn) from [] (warn_slowpath_fmt+0xb0/0xb8) [] (warn_slowpath_fmt) from [] (kunmap_local_indexed+0x194/0x1d0) [] (kunmap_local_indexed) from [] (remove_arg_zero+0xa0/0x158) [] (remove_arg_zero) from [] (load_script+0x250/0x318) [] (load_script) from [] (bprm_execve+0x3d0/0x930) [] (bprm_execve) from [] (do_execveat_common+0x174/0x184) [] (do_execveat_common) from [] (sys_execve+0x30/0x38) [] (sys_execve) from [] (ret_fast_syscall+0x0/0x28) Exception stack(0xc4561fa8 to 0xc4561ff0) 1fa0: b6f2bab8 bef7dac4 bef7dac4 bef7d8fc 004b9b58 bef7dac8 1fc0: b6f2bab8 bef7dac4 bef7d8fc 0000000b 004b8000 004bac44 bef7da3c bef7d8dc 1fe0: 0000002f bef7d89c b6d6dc74 b6d6d65c irq event stamp: 1283 hardirqs last enabled at (1293): [] console_unlock+0x430/0x6b0 hardirqs last disabled at (1302): [] console_unlock+0x428/0x6b0 softirqs last enabled at (1282): [] __do_softirq+0x528/0x674 softirqs last disabled at (1269): [] irq_exit+0x1dc/0x1e8 ---[ end trace 6f32a2fb4294655f ]--- I can do more tests to help fixing this issue. Just let me know what to do. ... Best regards -- Marek Szyprowski, PhD Samsung R&D Institute Poland