From: Sascha Hauer <s.hauer@pengutronix.de>
To: Stefan Riedmueller <s.riedmueller@phytec.de>
Cc: barebox@lists.infradead.org
Subject: Re: [PATCH v2] mtd: ubi: Max out wear-leveling threshold
Date: Mon, 23 Sep 2019 08:53:24 +0200 [thread overview]
Message-ID: <20190923065324.vf654tt2wyvq2f3q@pengutronix.de> (raw)
In-Reply-To: <1568979319-254499-1-git-send-email-s.riedmueller@phytec.de>
On Fri, Sep 20, 2019 at 01:35:19PM +0200, Stefan Riedmueller wrote:
> Due to the recursive ubi_thread implementation in the barebox, a large
> amount of wear-leveling can lead to a stack overflow.
>
> This was observed during extensive ubi stress tests with the linux
> kernel and periodic power cycles. We found that if the wear-leveling
> threshold is exceeded and a large amount of erase blocks need
> wear-leveling the stack can overflow.
>
> The hardware used to observe this was a phyCORE-i.MX 6 with 1GB NAND flash.
>
> As the kernel is perfectly capable of handling wear-leveling we can
> disable wear-leveling in the barebox by maxing out the threshold and
> removing its Kconfig option.
>
> Signed-off-by: Stefan Riedmueller <s.riedmueller@phytec.de>
> ---
> Changes in v2:
> - Remove threshold config completely instead of just maxing out the default
> ---
Applied, thanks
Sascha
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prev parent reply other threads:[~2019-09-23 6:53 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-20 11:35 Stefan Riedmueller
2019-09-23 6:53 ` Sascha Hauer [this message]
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