struct bio: mark as complete, but keep data buffer (and protect
it from freeing/using)?
avg at freebsd.org
Fri Dec 10 14:37:23 UTC 2010
on 09/12/2010 21:00 Lev Serebryakov said the following:
> Hello, Freebsd-geom.
> Is it possible to mark "struct bio" as complete (pass to
> g_io_deliver()) but hold its data buffer, to avoid unnecessary data
What do you mean by 'hold'? Store bio_data pointer locally?
I think that that greatly depends on what owner of that bio is going to do with it
after the operation completes. E.g. if it frees that memory then the pointer
would become stale.
So, in general case, it would probably be not a good idea.
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