On Fri, 5 Oct 2007, Dean S. Messing wrote:
Brendan Conoboy wrote:
snip
Is the onboard SATA controller real SATA or just an ATA-SATA
converter? If the latter, you're going to have trouble getting faster
performance than any one disk can give you at a time. The output of
'lspci' should tell
On Wed, 3 Oct 2007 12:48:27 -0400 (EDT), Justin Piszcz wrote:
Also if it is software raid, when you make the XFS filesyste, on it,
it sets up a proper (and tuned) sunit/swidth, so why would you want
to change that?
Oh I didn't, the sunit and swidth were set automatically. Do they look
sane?.
On Wed, 3 Oct 2007, Andrew Clayton wrote:
On Wed, 3 Oct 2007 12:48:27 -0400 (EDT), Justin Piszcz wrote:
Also if it is software raid, when you make the XFS filesyste, on it,
it sets up a proper (and tuned) sunit/swidth, so why would you want
to change that?
Oh I didn't, the sunit and
On Sat, 6 Oct 2007, Justin Piszcz wrote:
On Wed, 3 Oct 2007, Andrew Clayton wrote:
On Wed, 3 Oct 2007 12:48:27 -0400 (EDT), Justin Piszcz wrote:
Also if it is software raid, when you make the XFS filesyste, on it,
it sets up a proper (and tuned) sunit/swidth, so why would you want
to
Neil,
Here is the latest spin of the 'stripe_queue' implementation. Thanks to
raid6+bitmap testing done by Mr. James W. Laferriere there have been
several cleanups and fixes since the last release. Also, the changes
are now spread over 4 patches to isolate one conceptual change per
patch. The
The raid5 stripe cache object, struct stripe_head, serves two purposes:
1/ front-end: queuing incoming requests
2/ back-end: transitioning requests through the cache state machine
to the backing devices
The problem with this model is that queuing decisions are directly
Provide separate routines for allocating stripe_head and stripe_queue
objects and introduce 'io_weight' bitmaps to struct stripe_queue.
The io_weight bitmaps add an efficient way to determine what is pending in
a stripe_queue using 'hweight' in comparison to a 'for' loop.
Tested-by: Mr. James W.
The stripe_queue object collects i/o requests before they are handled by
the stripe-cache (via the stripe_head object). add_stripe_bio currently
looks at the state of the stripe-cache to implement bitmap support,
reimplement this using stripe_queue attributes.
Introduce the
Overview:
Taking advantage of the stripe_queue/stripe_head separation, this patch
implements a queue in front of the stripe cache. A stripe_queue pool
accepts incoming requests. As requests are attached, the weight of the
queue object is updated. A workqueue (raid456_cache_arbiter) is
On Sat, 6 Oct 2007, Dan Williams wrote:
Neil,
Here is the latest spin of the 'stripe_queue' implementation. Thanks to
raid6+bitmap testing done by Mr. James W. Laferriere there have been
several cleanups and fixes since the last release. Also, the changes
are now spread over 4 patches to
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