From: Kundan Kumar <kundan.kumar@samsung.com>
To: mcgrof@kernel.org
Cc: patches@lists.linux.dev, Kundan Kumar <kundan.kumar@samsung.com>,
Anuj Gupta <anuj20.g@samsung.com>
Subject: [PATCH v2 13/15] writeback: set the num of writeback contexts to number of online cpus
Date: Thu, 7 Aug 2025 10:27:04 +0530 [thread overview]
Message-ID: <20250807045706.2848-14-kundan.kumar@samsung.com> (raw)
In-Reply-To: <20250807045706.2848-1-kundan.kumar@samsung.com>
We create N number of writeback contexts, N = number of online cpus. The
inodes gets distributed across different writeback contexts, enabling
parallel writeback.
Signed-off-by: Kundan Kumar <kundan.kumar@samsung.com>
Signed-off-by: Anuj Gupta <anuj20.g@samsung.com>
---
mm/backing-dev.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index 0a772d984ecf..d32b13234cdd 100644
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -1046,7 +1046,7 @@ int bdi_init(struct backing_dev_info *bdi)
bdi->min_ratio = 0;
bdi->max_ratio = 100 * BDI_RATIO_SCALE;
bdi->max_prop_frac = FPROP_FRAC_BASE;
- bdi->nr_wb_ctx = 1;
+ bdi->nr_wb_ctx = num_online_cpus();
bdi->wb_ctx = kcalloc(bdi->nr_wb_ctx,
sizeof(struct bdi_writeback_ctx *),
GFP_KERNEL);
--
2.25.1
next prev parent reply other threads:[~2025-08-07 4:59 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20250807045740epcas5p4cdec49f07b86acf2eea832890393d256@epcas5p4.samsung.com>
2025-08-07 4:56 ` [PATCH v2 00/15] Test patch Parallelizing filesystem writeback Kundan Kumar
2025-08-07 4:56 ` [PATCH v2 01/15] writeback: add infra for parallel writeback Kundan Kumar
2025-08-07 4:56 ` [PATCH v2 02/15] writeback: add support to initialize and free multiple writeback ctxs Kundan Kumar
2025-08-07 4:56 ` [PATCH v2 03/15] writeback: link bdi_writeback to its corresponding bdi_writeback_ctx Kundan Kumar
2025-08-07 4:56 ` [PATCH v2 04/15] writeback: affine inode to a writeback ctx within a bdi Kundan Kumar
2025-08-07 4:56 ` [PATCH v2 05/15] writeback: modify bdi_writeback search logic to search across all wb ctxs Kundan Kumar
2025-08-07 4:56 ` [PATCH v2 06/15] writeback: invoke all writeback contexts for flusher and dirtytime writeback Kundan Kumar
2025-08-07 4:56 ` [PATCH v2 07/15] writeback: modify sync related functions to iterate over all writeback contexts Kundan Kumar
2025-08-07 4:56 ` [PATCH v2 08/15] writeback: add support to collect stats for all writeback ctxs Kundan Kumar
2025-08-07 4:57 ` [PATCH v2 09/15] f2fs: add support in f2fs to handle multiple writeback contexts Kundan Kumar
2025-08-07 4:57 ` [PATCH v2 10/15] fuse: add support for multiple writeback contexts in fuse Kundan Kumar
2025-08-07 4:57 ` [PATCH v2 11/15] gfs2: add support in gfs2 to handle multiple writeback contexts Kundan Kumar
2025-08-07 4:57 ` [PATCH v2 12/15] nfs: add support in nfs " Kundan Kumar
2025-08-07 4:57 ` Kundan Kumar [this message]
2025-08-07 4:57 ` [PATCH v2 14/15] writeback: segregated allocation and free of " Kundan Kumar
2025-08-07 4:57 ` [PATCH v2 15/15] writeback: added support to change the number of writebacks using a sysfs attribute Kundan Kumar
2025-08-07 18:34 ` [PATCH v2 00/15] Test patch Parallelizing filesystem writeback Luis Chamberlain
[not found] <CGME20250725155510epcas5p18d4d8948dc80a8324e89746090f27e9f@epcas5p1.samsung.com>
2025-07-25 15:54 ` [PATCH v2 00/15] " Kundan Kumar
2025-07-25 15:54 ` [PATCH v2 13/15] writeback: set the num of writeback contexts to number of online cpus Kundan Kumar
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