Messages in this thread |  | | | From | Rusty Russell <> | | Subject | Re: [PATCH 0/7] sg_ring: a ring of scatterlist arrays | | Date | Mon, 7 Jan 2008 16:28:10 +1100 | |
On Monday 07 January 2008 16:01:40 Tejun Heo wrote:
> > But we hit the same problems:> >> > 1) sg_chain loses information. The clever chain packaging makes reading
> > easy, but manipulation is severely limited. You can append to your own
> > chains by padding, but not someone elses. This works for SCSI, but what
> > about the rest of us? And don't even think of joining mapped chains: it
> > will almost work.>> You can append by allocating one more element on the chain to be
> appended and moving the last element of the first chain to it while
> using the last element for chaining.
Hi Tejun,
Nice try! Even ignoring the ugliness of undoing such an operation if the
caller doesn't expect you to mangle their chains, consider a one-element sg
array. :(
Cheers,
Rusty.
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