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From: Coly Li <colyli@suse.de>
To: axboe@kernel.dk
Cc: linux-bcache@vger.kernel.org, linux-block@vger.kernel.org,
	jianpeng.ma@intel.com, qiaowei.ren@intel.com,
	Coly Li <colyli@suse.de>
Subject: [PATCH 08/13] bcache: add BCH_FEATURE_INCOMPAT_NVDIMM_META into incompat feature set
Date: Wed, 14 Apr 2021 13:46:43 +0800	[thread overview]
Message-ID: <20210414054648.24098-9-colyli@suse.de> (raw)
In-Reply-To: <20210414054648.24098-1-colyli@suse.de>

This patch adds BCH_FEATURE_INCOMPAT_NVDIMM_META (value 0x0004) into the
incompat feature set. When this bit is set by bcache-tools, it indicates
bcache meta data should be stored on specific NVDIMM meta device.

The bcache meta data mainly includes journal and btree nodes, when this
bit is set in incompat feature set, bcache will ask the nvm-pages
allocator for NVDIMM space to store the meta data.

Signed-off-by: Coly Li <colyli@suse.de>
Cc: Jianpeng Ma <jianpeng.ma@intel.com>
Cc: Qiaowei Ren <qiaowei.ren@intel.com>
---
 drivers/md/bcache/features.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/md/bcache/features.h b/drivers/md/bcache/features.h
index d1c8fd3977fc..333fb5efb6bd 100644
--- a/drivers/md/bcache/features.h
+++ b/drivers/md/bcache/features.h
@@ -17,11 +17,19 @@
 #define BCH_FEATURE_INCOMPAT_OBSO_LARGE_BUCKET		0x0001
 /* real bucket size is (1 << bucket_size) */
 #define BCH_FEATURE_INCOMPAT_LOG_LARGE_BUCKET_SIZE	0x0002
+/* store bcache meta data on nvdimm */
+#define BCH_FEATURE_INCOMPAT_NVDIMM_META		0x0004
 
 #define BCH_FEATURE_COMPAT_SUPP		0
 #define BCH_FEATURE_RO_COMPAT_SUPP	0
+#ifdef CONFIG_BCACHE_NVM_PAGES
+#define BCH_FEATURE_INCOMPAT_SUPP	(BCH_FEATURE_INCOMPAT_OBSO_LARGE_BUCKET| \
+					 BCH_FEATURE_INCOMPAT_LOG_LARGE_BUCKET_SIZE| \
+					 BCH_FEATURE_INCOMPAT_NVDIMM_META)
+#else
 #define BCH_FEATURE_INCOMPAT_SUPP	(BCH_FEATURE_INCOMPAT_OBSO_LARGE_BUCKET| \
 					 BCH_FEATURE_INCOMPAT_LOG_LARGE_BUCKET_SIZE)
+#endif
 
 #define BCH_HAS_COMPAT_FEATURE(sb, mask) \
 		((sb)->feature_compat & (mask))
@@ -89,6 +97,7 @@ static inline void bch_clear_feature_##name(struct cache_sb *sb) \
 
 BCH_FEATURE_INCOMPAT_FUNCS(obso_large_bucket, OBSO_LARGE_BUCKET);
 BCH_FEATURE_INCOMPAT_FUNCS(large_bucket, LOG_LARGE_BUCKET_SIZE);
+BCH_FEATURE_INCOMPAT_FUNCS(nvdimm_meta, NVDIMM_META);
 
 static inline bool bch_has_unknown_compat_features(struct cache_sb *sb)
 {
-- 
2.26.2


  parent reply	other threads:[~2021-04-14  5:47 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-14  5:46 [PATCH 00/13] bcache patches for Linux v5.13 -- 2nd wave Coly Li
2021-04-14  5:46 ` [PATCH 01/13] bcache: add initial data structures for nvm pages Coly Li
2021-04-14  5:46 ` [PATCH 02/13] bcache: initialize the nvm pages allocator Coly Li
2021-04-14  5:46 ` [PATCH 03/13] bcache: initialization of the buddy Coly Li
2021-04-14  5:46 ` [PATCH 04/13] bcache: bch_nvm_alloc_pages() " Coly Li
2021-04-14  5:46 ` [PATCH 05/13] bcache: bch_nvm_free_pages() " Coly Li
2021-04-14  5:46 ` [PATCH 06/13] bcache: get allocated pages from specific owner Coly Li
2021-04-14  5:46 ` [PATCH 07/13] bcache: use bucket index to set GC_MARK_METADATA for journal buckets in bch_btree_gc_finish() Coly Li
2021-04-14  5:46 ` Coly Li [this message]
2021-04-14  5:46 ` [PATCH 09/13] bcache: initialize bcache journal for NVDIMM meta device Coly Li
2021-04-14  5:46 ` [PATCH 10/13] bcache: support storing bcache journal into " Coly Li
2021-04-14  5:46 ` [PATCH 11/13] bcache: read jset from NVDIMM pages for journal replay Coly Li
2021-04-14  5:46 ` [PATCH 12/13] bcache: add sysfs interface register_nvdimm_meta to register NVDIMM meta device Coly Li
2021-04-14  5:46 ` [PATCH 13/13] bcache: use div_u64() in init_owner_info() Coly Li
2021-04-16 12:01   ` Jens Axboe
2021-04-16  3:55 ` [PATCH 00/13] bcache patches for Linux v5.13 -- 2nd wave Coly Li
2021-04-16 12:02 ` Jens Axboe
2021-04-16 12:26   ` Coly Li

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