From: Boris Brezillon <boris.brezillon@collabora.com>
To: "Bean Huo (beanhuo)" <beanhuo@micron.com>,
Miquel Raynal <miquel.raynal@bootlin.com>
Cc: Vignesh Raghavendra <vigneshr@ti.com>,
Tudor Ambarus <Tudor.Ambarus@microchip.com>,
Richard Weinberger <richard@nod.at>,
Steve deRosier <derosier@gmail.com>,
"Zoltan Szubbocsev \(zszubbocsev\)" <zszubbocsev@micron.com>,
linux-mtd <linux-mtd@lists.infradead.org>,
Thomas Petazzoni <thomas.petazzoni@bootlin.com>,
tglx <tglx@linutronix.de>,
Piotr Wojtaszczyk <WojtaszczykP@cumminsallison.com>
Subject: Re: [EXT] [PATCH v2 3/3] mtd: rawnand: micron: Address the shallow erase issue
Date: Thu, 7 May 2020 11:30:50 +0200 [thread overview]
Message-ID: <20200507113050.71b6a27f@collabora.com> (raw)
In-Reply-To: <BN7PR08MB5684AFAA722A0633357C064ADBA50@BN7PR08MB5684.namprd08.prod.outlook.com>
On Thu, 7 May 2020 09:28:59 +0000
"Bean Huo (beanhuo)" <beanhuo@micron.com> wrote:
> Hi Richard
> Thanks.
>
> How about this special situation:
>
> Page 0(EC) is good;
> Page 1(VID) is bad;
UBI should reject the LEB because of this VID corruption, but I'm not
sure how well that works when you add fastmap in the mix :-/.
> Page 2 (data) is good;
> Page 3( data) is bad, or contain filling pattern.
> Page 4 (data) is good, or empty;
> Page 5( data) is bad, or contain filling pattern.
> Page 6 (data) is good, or empty;
> .....
>
>
> Bean
>
> >
> > ----- Ursprüngliche Mail -----
> > >> UBI scans only headers during attach. If you don't touch these, no way.
> > >
> > > Sorry, I misunderstood what you meant by payload. UBI should schedule
> > > the PEB for erase if the EC/VID header is corrupted.
> >
> > UBI even tries to recover from such a situation. If only the EC header is bad, it
> > will create a new one. Only of the VID header is bad/missing and the payload is
> > corrupted (ECC errors or bit-flips) it will erase it.
> >
> > A missing VID header plus good payload will cause UBI to stop attaching since it
> > violates the IO model.
> >
> > Thanks,
> > //richard
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next prev parent reply other threads:[~2020-05-07 9:31 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-03 11:40 [PATCH v2 0/3] Fix proposal for the Micron shallow erase issue Miquel Raynal
2020-05-03 11:40 ` [PATCH v2 1/3] mtd: rawnand: Add the nand_chip->erase hook Miquel Raynal
2020-05-03 15:01 ` Boris Brezillon
2020-05-03 11:40 ` [PATCH v2 2/3] mtd: rawnand: Add the nand_chip->write_oob hook Miquel Raynal
2020-05-03 15:09 ` Boris Brezillon
2020-05-03 17:02 ` Miquel Raynal
2020-05-03 11:40 ` [PATCH v2 3/3] mtd: rawnand: micron: Address the shallow erase issue Miquel Raynal
2020-05-03 16:10 ` Steve deRosier
2020-05-03 16:34 ` Boris Brezillon
2020-05-03 16:36 ` Miquel Raynal
2020-05-03 19:57 ` Steve deRosier
2020-05-06 8:37 ` [EXT] " Bean Huo (beanhuo)
2020-05-06 8:28 ` [EXT] " Bean Huo (beanhuo)
2020-05-06 8:45 ` Boris Brezillon
2020-05-06 15:50 ` Bean Huo (beanhuo)
2020-05-06 16:04 ` Boris Brezillon
2020-05-06 16:09 ` Bean Huo (beanhuo)
2020-05-06 16:29 ` Boris Brezillon
2020-05-06 16:50 ` Bean Huo (beanhuo)
2020-05-06 18:44 ` Richard Weinberger
2020-05-06 19:01 ` Boris Brezillon
2020-05-06 19:23 ` Richard Weinberger
2020-05-06 20:40 ` Boris Brezillon
2020-05-06 20:59 ` Richard Weinberger
2020-05-06 21:11 ` Boris Brezillon
2020-05-07 9:28 ` Bean Huo (beanhuo)
2020-05-07 9:40 ` Boris Brezillon
2020-05-07 9:28 ` Bean Huo (beanhuo)
2020-05-07 9:30 ` Boris Brezillon [this message]
2020-05-07 10:02 ` Richard Weinberger
2020-05-07 12:20 ` Richard Weinberger
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