|
On 21/12/2010 16:58, "Owen Smith" <owen.smith@xxxxxxxxxx> wrote: > +/* > + * Recognised only if "feature-trim" is present in backend xenbus info. > + * The "feature-trim" node contains a boolean indicating whether trim > + * requests are likely to succeed or fail. Either way, a trim request > + * may fail at any time with BLKIF_RSP_EOPNOTSUPP if it is unsupported by > + * the underlying block-device hardware. The boolean simply indicates whether > + * or not it is worthwhile for the frontend to attempt trim requests. > + * If a backend does not recognise BLKIF_OP_TRIM, it should *not* > + * create the "feature-trim" node! > + */ > +#define BLKIF_OP_TRIM 4 What is a 'trim operation'? It's not documented in the patch description(s) or in the protocol-defining header file. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
|
Copyright
, Citrix Systems Inc. All rights reserved.
Legal and Privacy
|
