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Mon, 25 May 2026 19:33:13 -0700 (PDT) Received: from google.com ([2a00:79e0:2031:6:890b:1e07:dd0a:52d0]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-36a723cee01sm10542213a91.14.2026.05.25.19.33.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 25 May 2026 19:33:13 -0700 (PDT) Date: Tue, 26 May 2026 11:33:09 +0900 From: Sergey Senozhatsky To: Andrew Morton Cc: Sergey Senozhatsky , Brian Geffon , Minchan Kim , Richard Chang , linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH 0/2] zram: writeback fixes Message-ID: References: <20260525044639.1888561-1-senozhatsky@chromium.org> <20260525143127.9f8ff15e31df71bdb494ab61@linux-foundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260525143127.9f8ff15e31df71bdb494ab61@linux-foundation.org> X-Stat-Signature: gq7okwkcaq1cdso81k3eer86bw7ghz7s X-Rspamd-Queue-Id: 1764140007 X-Rspam-User: X-Rspamd-Server: rspam10 X-HE-Tag: 1779762794-15423 X-HE-Meta: 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 WKD/mow2 TivYVSCEyJbjJnX9QrqcSL5H5IBdWRYZ6xbrg69L5+GswZ3v4wPVZn/+7oKZtJAnZjLsN9X+Cixs5o/as1fyaRIv/ZUN0dfNn7LFZK5LolbHqb3mIisYmVwgxBeHzU6k8IlG7pZ1+wBWLyBFyOLroE0VothCsgEM7s5rJjulOgGRfZ2CLS4UoDchZLQE6SLUciuAtBU97sgaSmAqcZGQ4FhpBK5bt0u7C6e05J7hvMZhSqhTub7BM1t8qAW+R0q2MhWLaCzxIkzYKUKT1sU7UUXavYth17OAD/PqRNt5seMqcG8JBREAPfhgIfYRzmJDZJ1vUriH39li+Hg5LheYn/8O6xaJ6MlzlA2O4PFwKAMee719dbYBEDbp9UwjrhjjtXnQ5YaXzCxTlPLuyhCCrH8JyrrvtelUhKSYQFwAbiEXpvWuQsdJTZ0HnOarIKs+JT04BRexQ7tnY6lmgWLaqjFHa2+aoV5nqh8pGdYgkzHpeEJY= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On (26/05/25 14:31), Andrew Morton wrote: > > Brian reported several issues with zram's writeback implementation. > > This small series addresses those issues. > > I hate to go all bureaucratic, but there's quite a lot missing here, > and it's rather important, to some. It's all about taking care of > people who are using kernels prior to 7.2 (or 7.1). Sorry, Andrew, it was just me being lazy. > - Link: to Brian's reports? > > - Description of user-visible runtime effects of the bugs? > > - Fixes: targets? > > - Decision on whether we should backport the fixes into earlier kernels? I updated commit messages and sent out v2. The reports are private, so on public links. Both issues are low risk. [..] > Also, AI review didn't find anything to complain about with these > changes, but it might have found a pre-existing issue: > > https://sashiko.dev/#/patchset/20260525044639.1888561-1-senozhatsky@chromium.org Correct, a pre-existing issue (first appeared in v6.19), we fix it in this series. The theoretical data leak issue first appeared in v7.0.