From patchwork Tue Jun 11 05:19:20 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 13692965 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 7481D17167F; Tue, 11 Jun 2024 05:20:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.137.202.133 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718083250; cv=none; b=naEqgQkvOJSbG06BfbVr4kfTAyjhmLWZk2nXBnHd9Nwk47jBLZEduGq6T64CquHY7Whq5Y9V6Ucq4hyHvZe1SHwtx7FqGhvRKST8TAQRqK4pGq5pCuEiLhA6YlTOMdswt6euNnKYklcPbub80Fe2zVTEDrIF9ZvPkr3rVI7UZTs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718083250; c=relaxed/simple; bh=KaFVXCRT05dbogpNw0fW7cHYUwv8D+jkWNfwRJXyrYs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=GN7IEuln2yFSe7AtTvnqWc6QX3wSIhax2EGZtufS64SRtW2QdHRlow3yXmwb1Rle55q4a07f2mLEV3Ens0sGpfeMCOC//GZ2VA1TRETCmIsXr3HsS35rtoMTxvCe2jQd5/2uEz/ykvLWQQbu5k9RgE2Ygc2T6SlAxjejGp35W8I= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de; spf=none smtp.mailfrom=bombadil.srs.infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=aID6+0uh; arc=none smtp.client-ip=198.137.202.133 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=bombadil.srs.infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="aID6+0uh" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description; bh=ZOX70G3pF40EpuFFjfhAf0Owh5pRXHCD6/58K2Ao0Eg=; b=aID6+0uheHH/EPlHuMos9YrI82 Svu7qFrDLDOo4EHoAbaWREcr9JJG8DrxnncOI+EwSzgsR0Einz2cIZJ8ElJVHMzt35A/SYECI64bF 4qfLxH0VSZ68DegO45KwBlm+6Gjhg/N+JsquVedMaxS8a67GHzehvoiPt5nXfE567FuPI3t9wfybG 4IawUezNERiarVEfyYmkFa7JO75Y11QhDeAZmaHpe6b8ZUbC1++FMs6TEFuqjDb4D/YonWbaxEljj iIhBWn3lPe4wmwc+GJwhEF+wJ3+s5D2ozh7tp4WNHTI+8QVb2dkyCHPDFcW3TNQltFsiD/o7VNOoT JSGMNkWg==; Received: from 2a02-8389-2341-5b80-cdb4-8e7d-405d-6b77.cable.dynamic.v6.surfer.at ([2a02:8389:2341:5b80:cdb4:8e7d:405d:6b77] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.97.1 #2 (Red Hat Linux)) id 1sGtvs-00000007RUV-3WAY; Tue, 11 Jun 2024 05:20:33 +0000 From: Christoph Hellwig To: Jens Axboe Cc: Geert Uytterhoeven , Richard Weinberger , Philipp Reisner , Lars Ellenberg , =?utf-8?q?Christoph_B=C3=B6hmwa?= =?utf-8?q?lder?= , Josef Bacik , Ming Lei , "Michael S. Tsirkin" , Jason Wang , =?utf-8?q?Roger_Pau_Monn=C3=A9?= , Alasdair Kergon , Mike Snitzer , Mikulas Patocka , Song Liu , Yu Kuai , Vineeth Vijayan , "Martin K. Petersen" , linux-m68k@lists.linux-m68k.org, linux-um@lists.infradead.org, drbd-dev@lists.linbit.com, nbd@other.debian.org, linuxppc-dev@lists.ozlabs.org, ceph-devel@vger.kernel.org, virtualization@lists.linux.dev, xen-devel@lists.xenproject.org, linux-bcache@vger.kernel.org, dm-devel@lists.linux.dev, linux-raid@vger.kernel.org, linux-mmc@vger.kernel.org, linux-mtd@lists.infradead.org, nvdimm@lists.linux.dev, linux-nvme@lists.infradead.org, linux-s390@vger.kernel.org, linux-scsi@vger.kernel.org, linux-block@vger.kernel.org Subject: [PATCH 20/26] block: move the dax flag to queue_limits Date: Tue, 11 Jun 2024 07:19:20 +0200 Message-ID: <20240611051929.513387-21-hch@lst.de> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240611051929.513387-1-hch@lst.de> References: <20240611051929.513387-1-hch@lst.de> Precedence: bulk X-Mailing-List: linux-mmc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Move the dax flag into the queue_limits feature field so that it can be set atomically and all I/O is frozen when changing the flag. Signed-off-by: Christoph Hellwig Reviewed-by: Damien Le Moal --- block/blk-mq-debugfs.c | 1 - drivers/md/dm-table.c | 4 ++-- drivers/nvdimm/pmem.c | 7 ++----- drivers/s390/block/dcssblk.c | 2 +- include/linux/blkdev.h | 6 ++++-- 5 files changed, 9 insertions(+), 11 deletions(-) diff --git a/block/blk-mq-debugfs.c b/block/blk-mq-debugfs.c index 62b132e9a9ce3b..f4fa820251ce83 100644 --- a/block/blk-mq-debugfs.c +++ b/block/blk-mq-debugfs.c @@ -88,7 +88,6 @@ static const char *const blk_queue_flag_name[] = { QUEUE_FLAG_NAME(SAME_FORCE), QUEUE_FLAG_NAME(INIT_DONE), QUEUE_FLAG_NAME(POLL), - QUEUE_FLAG_NAME(DAX), QUEUE_FLAG_NAME(STATS), QUEUE_FLAG_NAME(REGISTERED), QUEUE_FLAG_NAME(QUIESCED), diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c index eee43d27733f9a..d3a960aee03c6a 100644 --- a/drivers/md/dm-table.c +++ b/drivers/md/dm-table.c @@ -1834,11 +1834,11 @@ int dm_table_set_restrictions(struct dm_table *t, struct request_queue *q, limits->features |= BLK_FEAT_WRITE_CACHE | BLK_FEAT_FUA; if (dm_table_supports_dax(t, device_not_dax_capable)) { - blk_queue_flag_set(QUEUE_FLAG_DAX, q); + limits->features |= BLK_FEAT_DAX; if (dm_table_supports_dax(t, device_not_dax_synchronous_capable)) set_dax_synchronous(t->md->dax_dev); } else - blk_queue_flag_clear(QUEUE_FLAG_DAX, q); + limits->features &= ~BLK_FEAT_DAX; if (dm_table_any_dev_attr(t, device_dax_write_cache_enabled, NULL)) dax_write_cache(t->md->dax_dev, true); diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c index b821dcf018f6ae..1dd74c969d5a09 100644 --- a/drivers/nvdimm/pmem.c +++ b/drivers/nvdimm/pmem.c @@ -465,7 +465,6 @@ static int pmem_attach_disk(struct device *dev, struct dax_device *dax_dev; struct nd_pfn_sb *pfn_sb; struct pmem_device *pmem; - struct request_queue *q; struct gendisk *disk; void *addr; int rc; @@ -499,6 +498,8 @@ static int pmem_attach_disk(struct device *dev, } if (fua) lim.features |= BLK_FEAT_FUA; + if (is_nd_pfn(dev)) + lim.features |= BLK_FEAT_DAX; if (!devm_request_mem_region(dev, res->start, resource_size(res), dev_name(&ndns->dev))) { @@ -509,7 +510,6 @@ static int pmem_attach_disk(struct device *dev, disk = blk_alloc_disk(&lim, nid); if (IS_ERR(disk)) return PTR_ERR(disk); - q = disk->queue; pmem->disk = disk; pmem->pgmap.owner = pmem; @@ -547,9 +547,6 @@ static int pmem_attach_disk(struct device *dev, } pmem->virt_addr = addr; - if (pmem->pfn_flags & PFN_MAP) - blk_queue_flag_set(QUEUE_FLAG_DAX, q); - disk->fops = &pmem_fops; disk->private_data = pmem; nvdimm_namespace_disk_name(ndns, disk->disk_name); diff --git a/drivers/s390/block/dcssblk.c b/drivers/s390/block/dcssblk.c index 6d1689a2717e5f..d5a5d11ae0dcdf 100644 --- a/drivers/s390/block/dcssblk.c +++ b/drivers/s390/block/dcssblk.c @@ -548,6 +548,7 @@ dcssblk_add_store(struct device *dev, struct device_attribute *attr, const char { struct queue_limits lim = { .logical_block_size = 4096, + .features = BLK_FEAT_DAX, }; int rc, i, j, num_of_segments; struct dcssblk_dev_info *dev_info; @@ -643,7 +644,6 @@ dcssblk_add_store(struct device *dev, struct device_attribute *attr, const char dev_info->gd->fops = &dcssblk_devops; dev_info->gd->private_data = dev_info; dev_info->gd->flags |= GENHD_FL_NO_PART; - blk_queue_flag_set(QUEUE_FLAG_DAX, dev_info->gd->queue); seg_byte_size = (dev_info->end - dev_info->start + 1); set_capacity(dev_info->gd, seg_byte_size >> 9); // size in sectors diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 59c2327692589b..c2545580c5b134 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -307,6 +307,9 @@ enum { /* supports REQ_NOWAIT */ BLK_FEAT_NOWAIT = (1u << 7), + + /* supports DAX */ + BLK_FEAT_DAX = (1u << 8), }; /* @@ -575,7 +578,6 @@ struct request_queue { #define QUEUE_FLAG_SAME_FORCE 12 /* force complete on same CPU */ #define QUEUE_FLAG_INIT_DONE 14 /* queue is initialized */ #define QUEUE_FLAG_POLL 16 /* IO polling enabled if set */ -#define QUEUE_FLAG_DAX 19 /* device supports DAX */ #define QUEUE_FLAG_STATS 20 /* track IO start and completion times */ #define QUEUE_FLAG_REGISTERED 22 /* queue has been registered to a disk */ #define QUEUE_FLAG_QUIESCED 24 /* queue has been quiesced */ @@ -602,7 +604,7 @@ bool blk_queue_flag_test_and_set(unsigned int flag, struct request_queue *q); #define blk_queue_io_stat(q) ((q)->limits.features & BLK_FEAT_IO_STAT) #define blk_queue_zone_resetall(q) \ test_bit(QUEUE_FLAG_ZONE_RESETALL, &(q)->queue_flags) -#define blk_queue_dax(q) test_bit(QUEUE_FLAG_DAX, &(q)->queue_flags) +#define blk_queue_dax(q) ((q)->limits.features & BLK_FEAT_DAX) #define blk_queue_pci_p2pdma(q) \ test_bit(QUEUE_FLAG_PCI_P2PDMA, &(q)->queue_flags) #ifdef CONFIG_BLK_RQ_ALLOC_TIME