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| author | Justus Winter <4winter@informatik.uni-hamburg.de> | 2014-03-15 14:06:15 +0100 |
|---|---|---|
| committer | Justus Winter <4winter@informatik.uni-hamburg.de> | 2014-03-25 08:55:55 +0100 |
| commit | 07e46eb2e25583f0f3e06342f0c854769b353b10 (patch) | |
| tree | 45f4d44f2b23064f64da6df2a4d47b79a027ed64 /mach-defpager/Makefile | |
| parent | 6d5511668545d00da4e3e5dd142b4f082c76b083 (diff) | |
mach-defpager: replace the magic typecast with a hash table
Previously, the mach-defpager used a "magic typecast" for object
lookups. It renamed the port to the address of the associated object,
and upon receiving a message it would cast the port name back to a
pointer.
While this might seem like an optimization, it actually makes the port
handling in the kernel less efficient. Ports with small continuous
names are stored in an array, while other ports get spilled in a splay
tree.
Replace the linked list of default_port_t objects with a hash table.
Do not rename the ports, rather use the hash table to lookup objects
associated with ports.
* mach-defpager/default_pager.c (struct pager_port): Replace queue
with hash table, remove count, move type declaration to priv.h.
(pager_port_list_init): Adjust accordingly.
(pager_port_list_insert): Likewise.
(pager_port_list_delete): Likewise.
(destroy_paging_partition): Replace queue_iterate with HURD_IHASH_ITERATE.
(S_default_pager_objects): Likewise.
(S_default_pager_object_pages): Likewise.
(seqnos_memory_object_create): Do not rename the port but store it in
the hash table.
(S_default_pager_object_create): Likewise.
* mach-defpager/priv.h (struct dstruct): Add fast-removal pointer.
(pnameof): Remove obsolete macro definition.
(dnameof): Likewise.
* mach-defpager/mig-decls.h (begin_using_default_pager): Replace the
magic typecast with a hash table lookup.
* mach-defpager/Makefile (HURDLIBS): Add ihash.
Diffstat (limited to 'mach-defpager/Makefile')
| -rw-r--r-- | mach-defpager/Makefile | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/mach-defpager/Makefile b/mach-defpager/Makefile index c8e33c52..09debeda 100644 --- a/mach-defpager/Makefile +++ b/mach-defpager/Makefile @@ -29,6 +29,7 @@ OBJS := $(SRCS:.c=.o) \ memory_object default_pager memory_object_default exc) \ default_pager_replyUser.o +HURDLIBS:= ihash OTHERLIBS:= -lpthread LDFLAGS += -static |