From: Zhihao Cheng <chengzhihao1@huawei.com>
To: Ran Hongyun <ranhongyun1@huawei.com>, <richard@nod.at>,
<miquel.raynal@bootlin.com>, <vigneshr@ti.com>,
<vapier@gentoo.org>, <artem.bityutskiy@linux.intel.com>
Cc: <linux-mtd@lists.infradead.org>, <linux-kernel@vger.kernel.org>,
<yangerkun@huawei.com>, <yi.zhang@huawei.com>
Subject: Re: [PATCH 2/2] UBI: support per-device wear-leveling threshold
Date: Thu, 23 Jul 2026 11:01:06 +0800 [thread overview]
Message-ID: <7971d65d-ae24-d508-23ff-52afdc0b8d09@huawei.com> (raw)
In-Reply-To: <20260723020233.3079997-3-ranhongyun1@huawei.com>
在 2026/7/23 10:02, Ran Hongyun 写道:
> The UBI wear-leveling threshold (CONFIG_MTD_UBI_WL_THRESHOLD) is
> currently a compile-time constant shared by all UBI devices. When a
> single kernel image must support multiple NAND flashes with different
> erase lifetimes, one global threshold cannot suit all devices.
>
> Add a per-device configurable wl_threshold parameter:
>
> - UAPI: add __s32 wl_threshold to struct ubi_attach_req, carved
> from the existing padding.
>
> - Module parameter: ubi.mtd gains a new optional token
> "wl_threshold":
> ubi.mtd=0,0,0,0,0,0,256 ubi.mtd=1,0,0,0,0,0,4096
>
> 0 means "use the kernel default", the accepted range is
> 2-65536.
>
> Signed-off-by: Ran Hongyun <ranhongyun1@huawei.com>
> ---
> drivers/mtd/ubi/build.c | 43 ++++++++++++++++++++++++++++++------
> drivers/mtd/ubi/cdev.c | 2 +-
> drivers/mtd/ubi/fastmap-wl.c | 8 +++----
> drivers/mtd/ubi/ubi.h | 21 +++++++++++++++++-
> drivers/mtd/ubi/wl.c | 39 ++++++++------------------------
> include/uapi/mtd/ubi-user.h | 10 ++++++++-
> 6 files changed, 79 insertions(+), 44 deletions(-)
>
Reviewed-by: Zhihao Cheng <chengzhihao1@huawei.com>
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next prev parent reply other threads:[~2026-07-23 3:01 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-23 2:02 [PATCH 0/2] UBI: fix ubi.mtd MODULE_PARM_DESC issues and add per-device wear-leveling threshold Ran Hongyun
2026-07-23 2:02 ` [PATCH 1/2] UBI: fix two issues in the ubi.mtd MODULE_PARM_DESC Ran Hongyun
2026-07-23 2:40 ` Zhihao Cheng
2026-07-23 2:02 ` [PATCH 2/2] UBI: support per-device wear-leveling threshold Ran Hongyun
2026-07-23 3:01 ` Zhihao Cheng [this message]
2026-07-23 6:06 ` Ran Hongyun
2026-07-23 7:19 ` Richard Weinberger
2026-07-23 8:16 ` Ran Hongyun
2026-07-23 8:30 ` Richard Weinberger
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