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[222.152.189.37]) by smtp.gmail.com with ESMTPSA id d191sm13620298pga.27.2021.07.16.22.41.19 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Fri, 16 Jul 2021 22:41:23 -0700 (PDT) Subject: Re: RFC: remove set_fs for m68k To: Christoph Hellwig References: <20210709070132.3387689-1-hch@lst.de> <039e2f42-b9bc-d8ce-393a-c0896439f784@gmail.com> <87fswjomtm.fsf@igel.home> <969718aa-92d4-e77b-0630-f9da6c809178@gmail.com> <20210713054134.GA5880@lst.de> <90e30f50-f062-ac8d-68e7-1250c886d0e1@gmail.com> <20210713085419.GA22839@lst.de> <3acb1a9e-9133-50d4-a642-98d7046d6d4f@gmail.com> Cc: Andreas Schwab , Geert Uytterhoeven , Greg Ungerer , linux-m68k@lists.linux-m68k.org, Linus Torvalds From: Michael Schmitz Message-ID: <65a95ae0-4734-68ce-ef71-7491b5534718@gmail.com> Date: Sat, 17 Jul 2021 17:41:17 +1200 User-Agent: Mozilla/5.0 (X11; Linux ppc; rv:45.0) Gecko/20100101 Icedove/45.4.0 MIME-Version: 1.0 In-Reply-To: <3acb1a9e-9133-50d4-a642-98d7046d6d4f@gmail.com> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-m68k@vger.kernel.org Am 16.07.2021 um 14:03 schrieb Michael Schmitz: > Hi Christoph, > > On 15/07/21 7:26 am, Michael Schmitz wrote: >> I've got a vague recollection that I've seen weird crashes in the past >> related to temperature extremes (we've had a few unusually cold days >> in our parts just now), so I've gone back to a kernel from the switch >> stack / refactoring exit tests (which ran the stress tests fine >> earlier) to rule that one out. Looking good so far, so I begin to >> wonder whether we need to introduce get_fc() and use that to restore >> the original sfc/dfc instead of assuming USER_DATA is always correct? > > No crashes with the known good kernel after over a day of stress testing > - I'll try Andreas' patch once the current test run has completed. > > One thing I noticed with either your final or your v2 patch series - as > far as the tests ran at all, run times were 30% increased. That's a lot With Andreas' patch applied, the run time increase is now less severe (11-13%). I'll repeat that a few more times but it's looking a lot better so far. No instruction format errors seen anymore. Cheers, Michael