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smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=i6xNamUP; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="i6xNamUP" Received: by smtp.kernel.org (Postfix) with ESMTPSA id DF97BC4CEC3; Thu, 12 Sep 2024 11:59:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1726142371; bh=pT2O8s9fTQvDzkwMkAh8JeBg3fTi/QAnpTdl7+1QO0s=; h=Date:Cc:Subject:To:References:From:In-Reply-To:From; b=i6xNamUPOwTRSx4k1Wp2oXMrtKz45F2reLMp9/GeLiJ7nkAjYRifliI8T8jwV95ns tKdNVLN+E5EXK/t2Il1vk6zFyIntMy9suBQlFoHkg+cpYqu8YocFwIi0AJETmECez0 AKvfv8+OxmV01yniWCfThAJfaA6nkcXQwTkHBeejLvEHL9ZjxigEzQ9jxTq7jvWMOJ 9EDZOEG1ibDG7aLuKNpmsWk8VCVhWEkVOL60hJMGmIuofv5azF8S6LruYVdxAVsGIa CeYAecGMM+MsZDIka4otdFPvEqJIrb0Eykj98Ltbwb1JKxhUXxXxOilJv/D9Py53Dc yU9MxlZv1zw+w== Message-ID: Date: Thu, 12 Sep 2024 19:59:30 +0800 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Cc: chao@kernel.org, LKML Subject: Re: [PATCH] erofs: sunset unneeded NOFAILs To: Gao Xiang , linux-erofs@lists.ozlabs.org References: <20240905084732.2684515-1-hsiangkao@linux.alibaba.com> Content-Language: en-US From: Chao Yu Autocrypt: addr=chao@kernel.org; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 2024/9/5 16:47, Gao Xiang wrote: > With iterative development, our codebase can now deal with compressed > buffer misses properly if both in-place I/O and compressed buffer > allocation fail. > > Note that if readahead fails (with non-uptodate folios), the original > request will then fall back to synchronous read, and `.read_folio()` > should return appropriate errnos; otherwise -EIO will be passed to > user space, which is unexpected. > > To simplify rarely encountered failure paths, a mimic decompression > will be just used. Before that, failure reasons are recorded in > compressed_bvecs[] and they also act as placeholders to avoid in-place > pages. They will be parsed just before decompression and then pass > back to `.read_folio()`. > > Signed-off-by: Gao Xiang Reviewed-by: Chao Yu Thanks,