lkml.org 
[lkml]   [2008]   [Jan]   [7]   [last100]   RSS Feed
Views: [more markup]  [less markup]  [headers]  [forward] 
 
Messages in this thread
/
FromRusty Russell <>
SubjectRe: [PATCH 0/7] sg_ring: a ring of scatterlist arrays
DateMon, 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.


\
 
 \ /
  Last update: 2008-01-07 06:33    [from the cache]
©2003-2008