Re: ide-2.4.20-pre4-ac2.patch

From: Tomas Szepe <szepe@pinerecords.com>
To: Andre Hedrick <andre@linux-ide.org>
Cc: linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org
Subject: Re: ide-2.4.20-pre4-ac2.patch
Date: Wed, 28 Aug 2002 20:26:16 +0200	[thread overview]
Message-ID: <20020828182616.GA16018@louise.pinerecords.com> (raw)
In-Reply-To: <Pine.LNX.4.10.10208281118340.24156-100000@master.linux-ide.org>

> WHOA Tomas,
> 
> That is a major problem, are you using legacy patch or taskfile io?
> Ben H reported he was having problems with legacy path on PPC, but the new
> taskfile io worked fine.

Damn! Andre, I owe you **A BIG** apology -- it turns out the kernel that
caused the mess was actually a plain 2.4.20-pre4-ac2 _without_ your patch
applied -- dunno how far that is from what you have now. Nevertheless,
here's the corresponding 2.4.20-pre4-ac2 IDE config:

#
# IDE chipset support/bugfixes
#
# CONFIG_BLK_DEV_CMD640 is not set
# CONFIG_BLK_DEV_CMD640_ENHANCED is not set
# CONFIG_BLK_DEV_ISAPNP is not set
CONFIG_BLK_DEV_IDEPCI=y
CONFIG_BLK_DEV_GENERIC=y
CONFIG_IDEPCI_SHARE_IRQ=y
CONFIG_BLK_DEV_IDEDMA_PCI=y
# CONFIG_BLK_DEV_OFFBOARD is not set
# CONFIG_BLK_DEV_IDEDMA_FORCED is not set
CONFIG_IDEDMA_PCI_AUTO=y
# CONFIG_IDEDMA_ONLYDISK is not set
CONFIG_BLK_DEV_IDEDMA=y
# CONFIG_IDEDMA_PCI_WIP is not set
# CONFIG_IDEDMA_NEW_DRIVE_LISTINGS is not set
CONFIG_BLK_DEV_ADMA=y
# CONFIG_BLK_DEV_AEC62XX is not set
# CONFIG_BLK_DEV_ALI15X3 is not set
# CONFIG_WDC_ALI15X3 is not set
# CONFIG_BLK_DEV_AMD74XX is not set
# CONFIG_AMD74XX_OVERRIDE is not set
# CONFIG_BLK_DEV_CMD64X is not set
# CONFIG_BLK_DEV_CY82C693 is not set
# CONFIG_BLK_DEV_CS5530 is not set
# CONFIG_BLK_DEV_HPT34X is not set
# CONFIG_HPT34X_AUTODMA is not set
# CONFIG_BLK_DEV_HPT366 is not set
CONFIG_BLK_DEV_PIIX=y
# CONFIG_BLK_DEV_NFORCE is not set
# CONFIG_BLK_DEV_NS87415 is not set
# CONFIG_BLK_DEV_OPTI621 is not set
# CONFIG_BLK_DEV_PDC202XX_OLD is not set
# CONFIG_PDC202XX_BURST is not set
CONFIG_BLK_DEV_PDC202XX_NEW=y
# CONFIG_PDC202XX_FORCE is not set
# CONFIG_BLK_DEV_RZ1000 is not set
# CONFIG_BLK_DEV_SVWKS is not set
# CONFIG_BLK_DEV_SIIMAGE is not set
# CONFIG_BLK_DEV_SIS5513 is not set
# CONFIG_BLK_DEV_SLC90E66 is not set
# CONFIG_BLK_DEV_TRM290 is not set
# CONFIG_BLK_DEV_VIA82CXXX is not set
# CONFIG_IDE_CHIPSETS is not set
CONFIG_IDEDMA_AUTO=y
# CONFIG_IDEDMA_IVB is not set
# CONFIG_DMA_NONPCI is not set
CONFIG_BLK_DEV_PDC202XX=y
CONFIG_BLK_DEV_IDE_MODES=y
# CONFIG_BLK_DEV_ATARAID is not set
# CONFIG_BLK_DEV_ATARAID_PDC is not set
# CONFIG_BLK_DEV_ATARAID_HPT is not set

> On Wed, 28 Aug 2002, Tomas Szepe wrote:
> 
> > > This is out and has been forwarded to AC for review.
> > 
> > Okay, I tested this the hard way -- the root of one of my machines
> > got trashed. The controller used was a PDC20268 (Ultra100TX2), the
> > disks (with two partitions of equal size on each forming a raid0)
> > are IBM and WD. Soon after the kernel came up, it started spitting
> > messages like 'DMA disabled' and 'No DRQ after WRITE has been issued',
> > after which the machine froze entirely. Rebooting w/ an alternate
> > kernel revealed massive fs corruption with the superblock completely
> > overwritten.
> > 
> >   *** Everybody please treat this patch with extreme care. ***
> > 
> > Reiserfs people, this unfortunate event also made me find out about
> > the inability of reiserfsck 3.6.3-pre1 to rebuild the node tree --
> > the program pretends to work just fine but the in-kernel fs code
> > barfs when it's to operate on a repaired fs. 3.x.1b was able to
> > get the job done for me, though.
> > 
> > T.
> > -
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> > 
> 
> Andre Hedrick
> LAD Storage Consulting Group