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Wed, 14 Oct 2026 19:11:47 -0700 (PDT) Received: from google.com ([2a00:79e0:2031:6:8455:7899:5a2e:26f8]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-3ac937f2d3bsm1227191a91.4.2026.10.14.19.11.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 14 Oct 2026 19:11:46 -0700 (PDT) Date: Thu, 15 Oct 2026 11:11:42 +0900 From: Sergey Senozhatsky To: Sergey Senozhatsky Cc: Bo Zhang , akpm@linux-foundation.org, bgeffon@google.com, minchan@kernel.org, richardycc@google.com, baohua@kernel.org, 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: <20261013035201.2809924-11-senozhatsky@chromium.org> <20261014153603.1365617-1-zhangbo56@xiaomi.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: A159A40004 X-Rspam-User: X-Stat-Signature: 3q46kq68tjwwnea1arhjbpchcxe8ippm X-HE-Tag: 1792030308-141093 X-HE-Meta: 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 u8/0MQ8T iDogsvOrbW6OP/P3r4IxUecN11Bpvznj2shEV6gSQxhK2qE7iHwh+PDMg/sKlAmTsT2/4H+0m4+TgWQh8gFB+eE+mlP1umRqb/lKtjMN3n+zPaERKlBPVhCcT1tQK8qr2Td1Fn0zbWEFIICAMOpoJnxfBhHeChkS543tpbTuea8GC5+th3G7UVxDNRT4byinJL/idVgrIAAatCn0fRHsuos4YHvaC77AdgC5e4BR9mhq6aTNYUNhay2lNuPfqm1hgC++jn0UjF2j4Sfu+op/mqdp8SMeDcEDF0ogpOvYQ+CR4QRrO2KVJzC/NeXYQADDImu3tgqbR6R9XPOlwfzEmnfnU5/aRTgV19CMY1oU1xGkxqK6R6XScKW8AwCxi7tW3ZrM3Gb+vjcNdVrUD69AK6LwFkA== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On (26/10/15 10:41), Sergey Senozhatsky wrote: [..] > + if (zcomp_shared_decomp(comp)) { > + struct page *pages[2]; > + unsigned int flags; > + > + pages[0] = sg_page(sg); > + pages[1] = sg_page(sg_next(sg)); > + > + flags = memalloc_noreclaim_save(); ^^^ memalloc noio > + src = vm_map_ram(pages, 2, NUMA_NO_NODE); > + memalloc_noreclaim_restore(flags); ^^^ memalloc noio