tech-kern archive

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Old Index]

Re: blocksizes

On Fri, Jan 22, 2010 at 01:09:10PM +0100, Michael van Elst wrote:
> Keeping DEV_SIZE at 512 bytes avoids lots of changes.

Won't that mean there is a chance there will be a lot of
read/modify/write going on if the driver is pretending to have 512byte
sectors? Would that not be really really bad for NFS write performance
since the NFS spec says a write has to hit the media before being
confirmed then wouldn't a streaming write of 512byte sectors would
cause a lot of sequential read/modify/write as each 512byte chunk of
the underlying disk block size was updated?

Brett Lymn
The information contained in this email and any attached files is
confidential to BAE Systems Australia. If you are not the intended
recipient, any use, disclosure or copying of this email or any
attachments is expressly prohibited.  If you have received this email
in error, please notify us immediately. VIRUS: Every care has been
taken to ensure this email and its attachments are virus free,
however, any loss or damage incurred in using this email is not the
sender's responsibility.  It is your responsibility to ensure virus
checks are completed before installing any data sent in this email to
your computer."

Home | Main Index | Thread Index | Old Index