On 24/8/07 18:26, "Andi Kleen" <andi@xxxxxxxxxxxxxx> wrote:
>> Another nice thing would be that if we do not use CFQ then we do not need a
>> kernel thread per VBD.
>
> It would be probably easy to extend CFQ2 to use an user passed identifier
> instead of per task for sharing if that's your goal. For a kernel driver
> like blkback you could just switch around multiple current->io_contexts.
Does current->io_context get latched before submit_bh() (or whatever similar
function it is we use) returns? Is this true even in older 2.6 kernels with
old CFQ?
 -- Keir
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