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Miller" , Max Filippov , Christoph Hellwig , Robin Murphy , Lad Prabhakar , Conor Dooley , "linux-snps-arc@lists.infradead.org" , "linux-arm-kernel@lists.infradead.org" , "linux-oxnas@groups.io" , "linux-csky@vger.kernel.org" , "linux-hexagon@vger.kernel.org" , "linux-m68k@lists.linux-m68k.org" , "linux-mips@vger.kernel.org" , "linux-openrisc@vger.kernel.org" , "linux-parisc@vger.kernel.org" , "linuxppc-dev@lists.ozlabs.org" , "linux-riscv@lists.infradead.org" , "linux-sh@vger.kernel.org" , "sparclinux@vger.kernel.org" , "linux-xtensa@linux-xtensa.org" , Shahab Vahedi Subject: Re: [PATCH 13/21] arc: dma-mapping: skip invalidating before bidirectional DMA Thread-Topic: [PATCH 13/21] arc: dma-mapping: skip invalidating before bidirectional DMA Thread-Index: AQHZZS+qm3aBT5RvZkOaPbJNwNvoFq8eAmCA Date: Thu, 6 Apr 2023 09:01:15 +0000 Message-ID: References: <20230327121317.4081816-1-arnd@kernel.org> <20230327121317.4081816-14-arnd@kernel.org> <2b298e8c-e6fc-a973-9f42-b6a88e92838a@kernel.org> 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sfid-20230406_020851_082785_22FF9821 X-CRM114-Status: GOOD ( 14.20 ) X-BeenThere: linux-snps-arc@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux on Synopsys ARC Processors List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-snps-arc" Errors-To: linux-snps-arc-bounces+linux-snps-arc=archiver.kernel.org@lists.infradead.org On 4/2/23 08:52, Vineet Gupta wrote: > CC Shahab > > On 3/27/23 17:43, Arnd Bergmann wrote: >> From: Arnd Bergmann >> >> Some architectures that need to invalidate buffers after bidirectional >> DMA because of speculative prefetching only do a simpler writeback >> before that DMA, while architectures that don't need to do the second >> invalidate tend to have a combined writeback+invalidate before the >> DMA. >> >> arc is one of the architectures that does both, which seems unnecessary. >> >> Change it to behave like arm/arm64/xtensa instead, and use just a >> writeback before the DMA when we do the invalidate afterwards. >> >> Signed-off-by: Arnd Bergmann > > Reviewed-by: Vineet Gupta > > Shahab can you give this a spin on hsdk - run glibc testsuite over ssh > and make sure nothing strange happens. > > Thx, > -Vineet Tested-by: Shahab Vahedi No regression was observed for the ARC target before and after applying these 21 patches. The test environment and its summary follow. board: ARC HSDK base: repo: linux-next tag: next-20230403 commit: 31bd35b66249 Add linux-next specific files for 20230403 hotfix: net: stmmac: check fwnode for phy device before scanning for phy [1] glibc: 2.37 Summary of test results: 20 FAIL 4227 PASS 38 UNSUPPORTED 16 XFAIL 2 XPASS [1] https://lore.kernel.org/lkml/20230405093945.3549491-1-michael.wei.hong.sit@intel.com/#r -- Shahab _______________________________________________ linux-snps-arc mailing list linux-snps-arc@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-snps-arc