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core: remove redundant datastructure

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Avl allocator provides a method to lookup any element, which is sufficient
to find all regions to destruct.

Issue #2173
This commit is contained in:
Alexander Boettcher 2016-11-15 10:34:22 +01:00 committed by Christian Helmuth
parent 82443ddee6
commit 3c4372210e
2 changed files with 8 additions and 33 deletions
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4
repos/base/src/core/include/region_map_component.h
View File

@ -285,12 +285,8 @@ class Genode::Region_map_component : public Genode::Weak_object<Genode::Region_m
typedef Tslab<Rm_region_ref, get_page_size() - Sliced_heap::meta_data_size()>
Ref_slab;
Ref_slab _ref_slab; /* backing store for
region list */
Allocator_avl_tpl<Rm_region> _map; /* region map for attach,
detach, pagefaults */
List<Rm_region_ref> _regions; /* region list for destruction */
Fifo<Rm_faulter> _faulters; /* list of threads that faulted at
the region map and wait
for fault resolution */

37
repos/base/src/core/region_map_component.cc
View File

@ -392,16 +392,6 @@ Region_map_component::attach(Dataspace_capability ds_cap, size_t size,
_map.metadata(r, Rm_region((addr_t)r, size, true, dsc, offset, this));
Rm_region *region = _map.metadata(r);
/* also update region list */
Rm_region_ref *p;
try { p = new(&_ref_slab) Rm_region_ref(region); }
catch (Allocator::Out_of_memory) {
_map.free(r);
throw Out_of_metadata();
}
_regions.insert(p);
/* inform dataspace about attachment */
dsc->attached_to(region);
@ -552,16 +542,6 @@ void Region_map_component::detach(Local_addr local_addr)
* region maps.
*/
unmap_managed(this, &region, 1);
/* update region list */
Rm_region_ref *p = _regions.first();
for (; p; p = p->next())
if (p->region() == region_ptr) break;
if (p) {
_regions.remove(p);
destroy(&_ref_slab, p);
}
}
@ -641,7 +621,6 @@ Region_map_component::Region_map_component(Rpc_entrypoint &ep,
:
_ds_ep(&ep), _thread_ep(&ep), _session_ep(&ep),
_md_alloc(md_alloc),
_ref_slab(&_md_alloc),
_map(&_md_alloc), _pager_ep(&pager_ep),
_ds(align_addr(vm_size, get_page_size_log2())),
_ds_cap(_type_deduction_helper(_ds_ep->manage(&_ds)))
@ -687,17 +666,17 @@ Region_map_component::~Region_map_component()
} while (cl);
/* detach all regions */
Rm_region_ref *ref;
do {
void * local_addr;
while (true) {
addr_t out_addr = 0;
{
Lock::Guard lock_guard(_lock);
ref = _ref_slab.first_object();
if (!ref) break;
local_addr = reinterpret_cast<void *>(ref->region()->base());
if (!_map.any_block_addr(&out_addr))
break;
}
detach(local_addr);
} while (ref);
detach(out_addr);
}
/* revoke dataspace representation */
_ds_ep->dissolve(&_ds);