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Tue, 2 Jan 2024 05:26:00 -0500 (EST) Message-ID: Subject: Re: [PATCH v2] LoongArch: Fix and simplify fcsr initialization on execve From: Xi Ruoyao To: Huacai Chen , WANG Xuerui Cc: Eric Biederman , Kees Cook , Tiezhu Yang , Jinyang He , loongarch@lists.linux.dev, linux-mm@kvack.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org Date: Tue, 02 Jan 2024 18:25:54 +0800 In-Reply-To: <20240102101711.10872-2-xry111@xry111.site> References: <20240102101711.10872-2-xry111@xry111.site> Autocrypt: addr=xry111@xry111.site; prefer-encrypt=mutual; keydata=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 Content-Type: text/plain; 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Phew. I just managed to recommission my 3A4000 and I can reproduce the issue as well with Linux 5.18.1 (the latest kernel release when I decommissioned it) and CONFIG_PREEMPT=3Dy. % cat measure.c #include int main() { return fetestexcept(FE_INEXACT); } % echo $((1./3)) 0.33333333333333331 % while ./a.out; do ; done (stopped in seconds) I'm building the mainline kernel on the 3A4000 now, will see if the issue still exists... --=20 Xi Ruoyao School of Aerospace Science and Technology, Xidian University