Re: HAMMER problems with ciss

[György Vilmos <vilmos.gyorgy@xxxxxxxxx>]

Hi Matt,

On 07/08/2009, Matthew Dillon <dillon@apollo.backplane.com> wrote:
>
> :Hi All,
> :
> :I'm trying to do some testing with dfly 2.2 (both release and the last
> :release snapshot) and HAMMER.
> :For the first run I issued a simple dd if=/dev/zero of=testfile bs=1M
> :command on the filesystem, which wrote some stuff out and immediately
> :switched the file system into read only mode.
> :
> :UFS works fine.
> :
> :The kernel logs this:
> :(da1:ciss1:0:1:0): SYNCHRONIZE CACHE(10). CDB: 35 0 0 0 0 0 0 0 0 0
> :(da1:ciss1:0:1:0): CAM Status: SCSI Status Error
> :(da1:ciss1:0:1:0): SCSI Status: Check Condition
> :(da1:ciss1:0:1:0): ILLEGAL REQUEST asc:20,0
> :(da1:ciss1:0:1:0): Invalid command operation code
> :(da1:ciss1:0:1:0): Unretryable error
> :HAMMER(test): Critical error inode=-1 while flushing meta-data
> :HAMMER(test): Forcing read-only mode
> :HAMMER(test): Critical error inode=-1 while flushing meta-data
> :HAMMER(test): Critical write error during flush, refusing to sync UNDO FIFO
> :
> :This is with a HP P400 controller with battery backed write cache,
> :which -as it seems- doesn't support the SYNCHRONIZE CACHE command.
> :FreeBSD's ciss driver apparently has workaround for this.
> :
> :Any chance of merging that change into dfly?
> :
> :Regards,
>
>     Hmm.  I looked at the driver code and we seem to have the same
>     workaround.  The workaround is disabled in both the FreeBSD driver
>     and our driver.  Please try changing line 899 in dev/raid/ciss.c,
>     change the #if 0 to an #if 1.
>
> #if 0
>     /* XXX later revisions may not need this */
>     sc->ciss_flags |= CISS_FLAG_FAKE_SYNCH;
> #endif
>
>     And see if that fixes the problem.  Also post all the ciss lines
>     from /var/run/dmesg.boot, maybe I can do a more specific check of
>     adapter version to set the flag for.
ciss0: <HP Smart Array P800> port 0x5000-0x50ff mem
0xfdef0000-0xfdef0fff,0xfdf00000-0xfdffffff irq 7 at device 0.0 on
pci14
ciss1: <HP Smart Array P400> port 0x4000-0x40ff mem
0xfdbf0000-0xfdbf0fff,0xfdc00000-0xfdcfffff irq 10 at device 0.0 on
pci6
da0 at ciss1 bus 0 target 0 lun 0
da1 at ciss1 bus 0 target 1 lun 0
da2 at ciss1 bus 0 target 2 lun 0
but I think it would be the same for all SA family members...

Works fine with this change, thanks.

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