On Wed, 26 Sep 2018, Reinette Chatre wrote:
> /**
> - * rdtgroup_cbm_overlaps - Does CBM for intended closid overlap with other
> + * _rdtgroup_cbm_overlaps - Does CBM for intended closid overlap with other
> * @r: Resource to which domain instance @d belongs.
> * @d: The domain instance for which @closid is being tested.
> * @cbm: Capacity bitmask being tested.
> @@ -1049,8 +1048,8 @@ static int __attribute__((unused))
> rdt_cdp_peer_get(struct rdt_resource *r,
> *
> * Return: false if CBM does not overlap, true if it does.
> */
> -bool rdtgroup_cbm_overlaps(struct rdt_resource *r, struct rdt_domain *d,
> - u32 _cbm, int closid, bool exclusive)
> +static bool _rdtgroup_cbm_overlaps(struct rdt_resource *r, struct rdt_domain
> *d,
> + u32 _cbm, int closid, bool exclusive)
Existing issue. The documentation uses @cbm, but the argument is _cbm.
Also please make this __rdtgroup_cbm_overlaps(). Double underscores are
standing more out.
> {
> unsigned long *cbm = (unsigned long *)&_cbm;
> unsigned long *ctrl_b;
> @@ -1087,6 +1086,44 @@ bool rdtgroup_cbm_overlaps(struct rdt_resource *r,
> struct rdt_domain *d,
> return false;
> }
>
> +/**
> + * rdtgroup_cbm_overlaps - Does CBM overlap with other use of hardware
> + * @r: Resource to which domain instance @d belongs.
> + * @d: The domain instance for which @closid is being tested.
> + * @cbm: Capacity bitmask being tested.
> + * @closid: Intended closid for @cbm.
> + * @exclusive: Only check if overlaps with exclusive resource groups
> + *
> + * Resources that can be allocated using a CBM can use the CBM to control
> + * the overlap of these allocations. rdtgroup_cmb_overlaps() is the test
> + * for overlap. Overlap test is not limited to the specific resource for
> + * which the CBM is intended though - when dealing with CDP resources that
> + * share the underlying hardware the overlap check should be performed on
> + * the CDP resource sharing the hardware also.
> + *
> + * Refer to description of _rdtgroup_cbm_overlaps() for the details of the
> + * overlap test.
> + *
> + * Return: true if CBM overlap detected, false if there is no overlap
> + */
> +bool rdtgroup_cbm_overlaps(struct rdt_resource *r, struct rdt_domain *d,
> + u32 _cbm, int closid, bool exclusive)
Ditto. And here is no reason for using _cbm.
> +{
> + struct rdt_resource *r_cdp;
> + struct rdt_domain *d_cdp;
> + bool ret;
> +
> + ret = _rdtgroup_cbm_overlaps(r, d, _cbm, closid, exclusive);
> + if (ret)
> + return ret;
if (__rdtgroup_cbm_overlaps(r, d, _cbm, closid, exclusive))
return true;
> +
> + if (rdt_cdp_peer_get(r, d, &r_cdp, &d_cdp) == 0)
> + return _rdtgroup_cbm_overlaps(r_cdp, d_cdp, _cbm,
> + closid, exclusive);
if (rdt_cdp_peer_get(r, d, &r_cdp, &d_cdp) < 0)
return false;
return __rdtgroup_cbm_overlaps(r_cpd, d_cdp, _cbm, closid, exclusive);
Makes the whole thing more obvious.
Thanks,
tglx
