Brief freezes with -current as of early last week

[Nik Clayton]

On Mon, Sep 20, 2004 at 12:00:19PM -0400, David Schultz wrote:
> This sounds like an I/O hang.  I've been having similar problems
> related to WRITE_DMA and READ_DMA timeouts from the ata driver in
> the last week or so, as discussed last week on this list.  Are you
> seeing these messages from the kernel?  

Like these?

ad0: TIMEOUT - READ_DMA retrying (2 retries left) LBA=47240127
ad0: WARNING - READ_DMA no interrupt but good status
ad1: TIMEOUT - READ_DMA retrying (2 retries left) LBA=165370263
ad1: WARNING - READ_DMA no interrupt but good status

ad0 is a 2 year old 40GB disk, ad1 is 1 week old 120GB disk.

> Julian suggested disabling
> preemption, which I haven't tried yet, but other people report
> limited success.

I'm not running a kernel with 'options PREEMPTION' compiled in...

N
-- 
FreeBSD: The Power to Serve      http://www.freebsd.org/               (__)
FreeBSD Documentation Project    http://www.freebsd.org/docproj/    \\\'',)
                                                                      \/  \ ^
   --- 15B8 3FFC DDB4 34B0 AA5F  94B7 93A8 0764 2C37 E375 ---         .\._/_)
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 187 bytes
Desc: not available
Url : http://lists.freebsd.org/pipermail/freebsd-current/attachments/20040920/f4e0c811/attachment.bin