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Howlett" , Lance Yang , Leon Romanovsky , Lorenzo Stoakes , Michal Hocko , Nico Pache , Peter Xu , Ryan Roberts , Sarthak Sharma , Shuah Khan , Suren Baghdasaryan , Vlastimil Babka , Zi Yan , linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH v2 16/53] selftests/mm: protection_keys: use kselftest framework Message-ID: References: <20260418105539.1261536-1-rppt@kernel.org> <20260418105539.1261536-17-rppt@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Stat-Signature: g996scomwtzchu93c3d5x5ituwwf9uq9 X-Rspam-User: X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: 218A01C0005 X-HE-Tag: 1777021915-416414 X-HE-Meta: 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 pfJ2ojGo n6wjiqOaZFX5Zd0DcSxKGN/E075E4xnfPjeiGBYRPi7e8JzDgAzYZZNQUqzR+JTyB7wa28GAmKTLjg8mpyNjnuIlQZLcY+X4GLAA91wod4jIaQIet8cP93rm0Gni9imU86pyR09PwqpgWLYkogC2w0Hf8gi2jJQf1ZTqpf0w1nBMhidEX2zUbs+f6ZLfKbt42AYW5gYdWhI8s51CgZgHyZ9fC0+m1cxFZm9Kko4UK7jSKoeieQKjD6Kgw4eovdPaDtbgi4/8lwUPGhGv+Ih1NvPLP0YxNcHuLKX2oeN9G0KzSwdI= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Tue, Apr 21, 2026 at 01:59:21PM +0100, Mark Brown wrote: > On Tue, Apr 21, 2026 at 11:19:34AM +0300, Mike Rapoport wrote: > > On Mon, Apr 20, 2026 at 06:54:31PM +0100, Mark Brown wrote: > > > > If that fflush() is needed it should go into the helper, particularly > > > since ksft_finshed() calls exit() so the fflush() will never be reachd. > > > Looks like I'm missing prints because of something in my environment, I'll > > just drop the fflush(). > > Interesting. Usually the culprit would be calls to _exit() that bypass > the libc cleanup but I'm not seeing any right now... Interesting indeed :) My observations up till now that if I run the test on the host, it prints everything (without fflush()) changes at all). If I run the same test in a VM either using virtio-ng or ssh'ing into a debian VM, only the first part of prints is displayed. However if I run protection_keys_64 | tee in the same VM everything is printed. I'll just drop the fflush() from this patch and will investigate later. -- Sincerely yours, Mike.