On Mon, Nov 20 2006, Alan Stern wrote:
> Paul:
>
> Here's my version of your patch from yesterday. It's basically the same,
> but I cleaned up the code in a few places and fixed a bug (the sign of idx
> in srcu_read_unlock). Also I changed the init routine back to void, since
> it's no longer an error if the per-cpu allocation fails.
>
> More importantly, I added a static initializer and included the fast-path
> in synchronize_srcu. It's protected by the new symbol
> SMP__STORE_MB_LOAD_WORKS, which should be defined in arch-specific headers
> for those architectures where the store-mb-load pattern is safe.
Must we introduce memory allocations in srcu_read_lock()? It makes it
much harder and nastier for me to use. I'd much prefer a failing
init_srcu(), seems like a much better API.
--
Jens Axboe
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