Messages in this thread | | | Subject | Re: [PATCH 1/4] lightnvm: add sync and close block I/O types | From | Matias Bjørling <> | Date | Thu, 5 May 2016 11:21:29 +0200 |
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On 05/04/2016 05:31 PM, Javier González wrote: > Within a target, I/O requests stem from different paths, which might vary > in terms of the data structures being allocated, context, etc. This > might impact how the request is treated, or how memory is freed once > the bio is completed. > > Add two different types of I/Os: (i) NVM_IOTYPE_SYNC, which indicates > that the I/O is synchronous; and (ii) NVM_IOTYPE_CLOSE_BLK, which > indicates that the I/O closes the block to which all the ppas on the > request belong to. > > Signed-off-by: Javier González <javier@cnexlabs.com> > --- > include/linux/lightnvm.h | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h > index 29a6890..6c02209 100644 > --- a/include/linux/lightnvm.h > +++ b/include/linux/lightnvm.h > @@ -11,6 +11,8 @@ enum { > > NVM_IOTYPE_NONE = 0, > NVM_IOTYPE_GC = 1, > + NVM_IOTYPE_SYNC = 2, > + NVM_IOTYPE_CLOSE_BLK = 4, > }; > > #define NVM_BLK_BITS (16) >
The sync should not be necessary when the read path is implemented using bio_clone. Similarly for NVM_IOTYPE_CLOSE_BLK. The write completion can be handled in the bio completion path.
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