From: Konstantin Dorfman <kdorfman@codeaurora.org>
To: Prasanna NAVARATNA <prasanna.navaratna@gmail.com>
Cc: linux-mmc@vger.kernel.org
Subject: Re: help with 'discard' mount option on eMMC
Date: Thu, 10 Oct 2013 11:53:25 +0300 [thread overview]
Message-ID: <52566B05.3000204@codeaurora.org> (raw)
In-Reply-To: <loom.20131010T083357-685@post.gmane.org>
Hello,
Could you please post kernel log of such failure?
What hw are you using?
On 10/10/13 09:44, Prasanna NAVARATNA wrote:
> Hello,
>
> I'm using Hynix eMMC4.41 with Linux kernel 3.4.5.
>
> After mounting ext4 partition /userdata with 'discard' mount option enabled,
> fs triggers TRIM commands to eMMC after every file deletion. With this
> setup, for a continuous reboot test (5s awake and issue reboot and repeat)
> with 10 or 20 iterations, i see data corruption in eMMC consistently.
>
> mount options are :- noatime,nosuid,nodev,noauto_da_alloc,discard
> encryptable="path"
>
> What am i missing here? if 'discard' mount option is removed, then no data
> corruption in eMMC for more than 200 iterations. Does TRIM needs some extra
> care? BKOPS is not enabled in eMMC (is bkops mandatory if using TRIM?)
> Apologies, if this is not proper platform to ask such question. Please guide
> and throw some light.
>
> Thanks,
> Prasanna NAVARATNA
>
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next prev parent reply other threads:[~2013-10-10 8:53 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-10 6:44 help with 'discard' mount option on eMMC Prasanna NAVARATNA
2013-10-10 8:53 ` Konstantin Dorfman [this message]
2013-10-10 9:40 ` Prasanna NAVARATNA
2013-10-10 11:17 ` Konstantin Dorfman
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