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[2003:de:3717:2700:e7f8:85d7:29fa:4be7]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-48868486461sm5136850f8f.8.2026.09.23.01.29.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 23 Sep 2026 01:29:07 -0700 (PDT) Message-ID: Subject: Re: [PATCH v6 1/2] md: Don't set MD_BROKEN for RAID1 and RAID10 when using FailFast From: Martin Wilck To: Kenta Akagi , Xiao Ni , Li Nan Cc: linux-raid@vger.kernel.org, linux-kernel@vger.kernel.org, song@kernel.org, yukuai@fnnas.com, shli@fb.com, mtkaczyk@kernel.org Date: Wed, 23 Sep 2026 10:29:06 +0200 In-Reply-To: <010601a0cc7347e3-ff9a517e-b03b-4de5-bd38-93b664f3425c-000000@ap-northeast-1.amazonses.com> References: <010601a0cc7347e3-ff9a517e-b03b-4de5-bd38-93b664f3425c-000000@ap-northeast-1.amazonses.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.60.2 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Hi Kenta, On Wed, 2026-09-23 at 04:08 +0000, Kenta Akagi wrote: >=20 >=20 > Hi Martin, >=20 > I have not given up on it, but I have not managed to post v7 yet. > I still think failfast should be usable even in setups like that. >=20 > It has been a while, but I intend to resume work on it. My thinking is that, in the fastfail case, code to prevent total failure could be placed in the end-IO code code path, e.g. by attempting a retry directly from the md layer when the last rdev fails, instead of setting failing the device. But I haven't thought it through. Thanks Martin --=20 Dr. Martin Wilck SUSE Software Solutions Germany GmbH, Frankenstr. 146, 90461 N=C3=BCrnberg, Germany Gesch=C3=A4ftsf=C3=BChrer: Stefan Gaiser, Jochen Jaser, Abhinav Puri (HRB 36809,AG N=C3=BCrnberg)