Re: [Xen-devel] [PATCH] xen-blkfront: switch from llist to list

[konrad wilk <konrad.wilk@xxxxxxxxxx>]

On 2/25/2013 12:00 PM, Roger Pau Monné wrote:
> On 25/02/13 17:49, Konrad Rzeszutek Wilk wrote:
> > On Fri, Feb 15, 2013 at 08:12:52PM +0100, Roger Pau Monné wrote:
> > > On 15/02/13 19:56, Konrad Rzeszutek Wilk wrote:
> > > > > Should be backported to 3.8 stable.
> > > > Lets do one thing at a time.
> > > >
> > > > The patch I have in the tree (and that I've asked Jens to pull for 3.9 - so
> > > > he might have already in his tree) is the old hybrid where we still use llist
> > > > but change the loop from 'for' to 'while'.
> > > >
> > > > This is the stable/for-jens-3.8 tree in 
> > > > git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen.git
> > > >
> > > > Could you rebase your patch on top of that tree and just simplify the loop?
> > > >
> > > > Sorry about the mess about this - but I had already pulled the trigger
> > > > so to say - hoping that Jens would pull the tree and do a git pull to Linus.
> > > >
> > > > And you are absolutly sure that we don't need any extra locking when switching
> > > > over to list_head? Say if blkif_completion is called while we are
> > > > processing in blkif_queue_request and doing ?
> > > Will recheck it, but blkif_completition is called with the io_lock hold,
> > > as does blkif_queue_request (I've added extra assert_spin_locked before
> > > every list modification).
> > Can you rebase this patch on top of 'stable/for-jens-3.9' when you get a chance
> > please?
> Yes, I was going to resubmit it as part of my indirect descriptors
> series (which I'm hoping to send before the end of the week), but if you
> are in a rush I can send it earlier, I already have it rebased on top of
> for-jens-3.9.
No rush. Just want to make sure it did not get lost. Thanks!


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