From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out-179.mta1.migadu.com (out-179.mta1.migadu.com [95.215.58.179]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D4D3E2566E8 for ; Tue, 24 Jun 2025 07:34:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=95.215.58.179 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750750469; cv=none; b=uYbPn3bXl1U8pJfMWmGSgMnxJ8Fo5hO4Oaht11g8kGSdwdYJkiAy4anrk13WX+QDXT/Ab4GhR0q8cHxyaQsFtppNyvjn8bts+xhN6fJpxjU8VRcway6T6qQEymad3aTNgujNcbCuxW6Aaxgnb4R1xUHfs86f5PBLJMUpjW3B3ds= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750750469; c=relaxed/simple; bh=ZGjLhU1aPnVRUxe4UTS7H9Ue8kRbCqGnj+Wp7TuisRs=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version:Content-Type; b=bissV3TbYx4EvpPTeun8VZide6kMyjGEG963gGMef4JMWHPSu8As9UW6WK7FqzslUd5Lvf1h5GWVE9HB9y6EeT7Y1TTppu+bsxCO0XfUZHNURNWb45+Zsb6pw1zGKWo+/N3/V6eZJuCjTjkTxKN4ZU3Q+s2Phd3iZkLAwYMHTmc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=xEDfWkSu; arc=none smtp.client-ip=95.215.58.179 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="xEDfWkSu" X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1750750453; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=vg2iyvp4fqWHcV5mfOcpjoLqyrEUQCSh1ms+/k+GFIM=; b=xEDfWkSuHgTQw1g9LN5h31OOixeV1zBzSHhV9j86Rg0OCHrf8dSzvMlWy8yDJ1hosa7Z0i SY/nhvi/iQ9BzCe9qvQBiWLTQfwJcMUxzePckFZF1pKBLySmBQ8AaeUYvaLNlPdS7HnmDW VUyxzeSwM1TYxgvFPXNz6BY9i/NCXY4= From: Dongsheng Yang To: mpatocka@redhat.com, agk@redhat.com, snitzer@kernel.org, axboe@kernel.dk, hch@lst.de, dan.j.williams@intel.com, Jonathan.Cameron@Huawei.com Cc: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-cxl@vger.kernel.org, nvdimm@lists.linux.dev, dm-devel@lists.linux.dev, Dongsheng Yang Subject: [PATCH v1 00/11] dm-pcache – persistent-memory cache for block devices Date: Tue, 24 Jun 2025 07:33:47 +0000 Message-ID: <20250624073359.2041340-1-dongsheng.yang@linux.dev> Precedence: bulk X-Mailing-List: linux-cxl@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT Hi Mikulas, This is V1 for dm-pcache, please take a look. Code: https://github.com/DataTravelGuide/linux tags/pcache_v1 Changelogs from RFC-V2: - use crc32c to replace crc32 - only retry pcache_req when cache full, add pcache_req into defer_list, and wait cache invalidation happen. - new format for pcache table, it is more easily extended with new parameters later. - remove __packed. - use spin_lock_irq in req_complete_fn to replace spin_lock_irqsave. - fix bug in backing_dev_bio_end with spin_lock_irqsave. - queue_work() inside spinlock. - introduce inline_bvecs in backing_dev_req. - use kmalloc_array for bvecs allocation. - calculate ->off with dm_target_offset() before use it. Dongsheng Yang (11): dm-pcache: add pcache_internal.h dm-pcache: add backing device management dm-pcache: add cache device dm-pcache: add segment layer dm-pcache: add cache_segment dm-pcache: add cache_writeback dm-pcache: add cache_gc dm-pcache: add cache_key dm-pcache: add cache_req dm-pcache: add cache core dm-pcache: initial dm-pcache target .../admin-guide/device-mapper/dm-pcache.rst | 201 ++++ MAINTAINERS | 8 + drivers/md/Kconfig | 2 + drivers/md/Makefile | 1 + drivers/md/dm-pcache/Kconfig | 17 + drivers/md/dm-pcache/Makefile | 3 + drivers/md/dm-pcache/backing_dev.c | 292 ++++++ drivers/md/dm-pcache/backing_dev.h | 88 ++ drivers/md/dm-pcache/cache.c | 444 +++++++++ drivers/md/dm-pcache/cache.h | 607 ++++++++++++ drivers/md/dm-pcache/cache_dev.c | 299 ++++++ drivers/md/dm-pcache/cache_dev.h | 70 ++ drivers/md/dm-pcache/cache_gc.c | 170 ++++ drivers/md/dm-pcache/cache_key.c | 907 ++++++++++++++++++ drivers/md/dm-pcache/cache_req.c | 810 ++++++++++++++++ drivers/md/dm-pcache/cache_segment.c | 293 ++++++ drivers/md/dm-pcache/cache_writeback.c | 276 ++++++ drivers/md/dm-pcache/dm_pcache.c | 467 +++++++++ drivers/md/dm-pcache/dm_pcache.h | 65 ++ drivers/md/dm-pcache/pcache_internal.h | 116 +++ drivers/md/dm-pcache/segment.c | 61 ++ drivers/md/dm-pcache/segment.h | 73 ++ 22 files changed, 5270 insertions(+) create mode 100644 Documentation/admin-guide/device-mapper/dm-pcache.rst create mode 100644 drivers/md/dm-pcache/Kconfig create mode 100644 drivers/md/dm-pcache/Makefile create mode 100644 drivers/md/dm-pcache/backing_dev.c create mode 100644 drivers/md/dm-pcache/backing_dev.h create mode 100644 drivers/md/dm-pcache/cache.c create mode 100644 drivers/md/dm-pcache/cache.h create mode 100644 drivers/md/dm-pcache/cache_dev.c create mode 100644 drivers/md/dm-pcache/cache_dev.h create mode 100644 drivers/md/dm-pcache/cache_gc.c create mode 100644 drivers/md/dm-pcache/cache_key.c create mode 100644 drivers/md/dm-pcache/cache_req.c create mode 100644 drivers/md/dm-pcache/cache_segment.c create mode 100644 drivers/md/dm-pcache/cache_writeback.c create mode 100644 drivers/md/dm-pcache/dm_pcache.c create mode 100644 drivers/md/dm-pcache/dm_pcache.h create mode 100644 drivers/md/dm-pcache/pcache_internal.h create mode 100644 drivers/md/dm-pcache/segment.c create mode 100644 drivers/md/dm-pcache/segment.h -- 2.43.0