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Fri, 30 Oct 2026 19:58:56 -0700 (PDT) Received: from zhangbo56-PC.mioffice.cn ([43.224.245.235]) by smtp.gmail.com with ESMTPSA id a92af1059eb24-1ac1b0a628bsm10940998c88.22.2026.10.30.19.58.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 30 Oct 2026 19:58:56 -0700 (PDT) From: zhangbo56 X-Google-Original-From: zhangbo56 To: senozhatsky@chromium.org Cc: akpm@linux-foundation.org, baohua@kernel.org, bgeffon@google.com, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, minchan@kernel.org, richardycc@google.com, zhangbo0325@gmail.com, zhangbo56 Subject: Re: [PATCH v7 00/15] zram: redesign zcomp and rework backends Date: Sat, 31 Oct 2026 10:58:46 +0800 Message-Id: <20261031025846.3774596-1-zhangbo56@xiaomi.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20261025021839.1542805-1-senozhatsky@chromium.org> References: <20261025021839.1542805-1-senozhatsky@chromium.org> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit I reported performance numbers earlier; this is a follow-up focused on stability. I ran an 8-hour stress test of this series using the following workload: 16 memcgs each looping a kernel build with tight memory limits to push anon memory out to the zram swap (zstd), plus continuous CPU hotplug (~113ms per cycle, 254k cycles). Repeated contained memcg OOM kills kept the per-CPU streams constantly torn down and re-created under load. Result: ran to completion, no issues. * dmesg clean - no BUG/Oops/stall/lockup/hung task/warning, no zram driver messages. * zram io_stat: failed_reads=0, failed_writes=0, invalid_io=0 across ~3.56 billion operations. * All CPUs back online cleanly. A shorter lz4 (stateless) run was also clean. Environment: 7.3.0-rc5-mmnew+, x86_64, PREEMPT, 28 CPUs, 8 GB RAM. For the whole series: Tested-by: zhangbo56 Thanks, Bo