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Wed, 14 Oct 2026 20:24:13 -0700 (PDT) Received: from google.com ([2a00:79e0:2031:6:8455:7899:5a2e:26f8]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-89d7f51ff63sm1700395b3a.5.2026.10.14.20.24.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 14 Oct 2026 20:24:12 -0700 (PDT) Date: Thu, 15 Oct 2026 12:24:08 +0900 From: Sergey Senozhatsky To: Bo Zhang Cc: baohua@kernel.org, senozhatsky@chromium.org, akpm@linux-foundation.org, bgeffon@google.com, minchan@kernel.org, richardycc@google.com, linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH v3 10/11] zram: use rw_semaphore for decompression streams Message-ID: References: <20261015031940.1410875-1-zhangbo56@xiaomi.com> Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20261015031940.1410875-1-zhangbo56@xiaomi.com> On (26/10/15 11:19), Bo Zhang wrote: > I'll also apply Sergey's vm_map_ram() patch (with the memalloc_noio > fixup) and re-run on-device. Note this only helps the cross-page part > of our exclusive reads on a stateless backend like lzo-rle; it won't > change zstd/deflate, which stay exclusive regardless because of > create_dctx. Will report the numbers separately. Thanks. I just sent another patch. vm_map_ram() is a little of a hard sell, I guess, because of TLBs. kmalloc() patch doesn't seem to be much worse (if worse at all).