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path: root/vm/vm_kern.c
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2014-02-06vm: trigger garbage collection on kernel memory pressureRichard Braun
In addition to physical pages, the slab allocator also consumes kernel virtual memory, so reclaim pages on failure to allocate from a kernel map. This method isn't foolproof but helps alleviate fragmentation. * vm/vm_kern.c (kmem_alloc): Call slab_collect and retry allocation once on failure. (kmem_realloc): Likewise. (kmem_alloc_wired): Likewise. (kmem_alloc_wired): Likewise. (kmem_alloc_aligned): Likewise.
2014-02-04Fix potential NULL dereferenceSamuel Thibault
* vm/vm_kern.c (projected_buffer_deallocate): Look for `map' being NULL or kernel_map before locking it.
2013-12-15vm/vm_kern.c (kmem_submap): remove unnecessary castMarin Ramesa
The return value from vm_map_min() is already of vm_offset_t type. * vm/vm_kern.c (kmem_submap) (addr): Remove unnecessary cast.
2013-12-05vm/vm_kern.c: remove forward declarationsMarin Ramesa
* vm/vm_kern.c (kmem_alloc_pages, kmem_remap_pages): Remove forward declarations. * vm/vm_kern.h (kmem_alloc_pages, kmem_remap_pages): Add prototypes.
2013-11-15vm/vm_kern.c: remove register qualifiersMarin Ramesa
* vm/vm_kern.c: Remove register qualifiers.
2011-12-17Adjust VM initializationRichard Braun
Unlike the zone allocator, the slab code can't be fed with an initial chunk of memory. Some VM objects used early during startup now have to be statically allocated, and kernel map entries need a special path to avoid recursion when being allocated. * vm/vm_map.c (vm_submap_object_store): New variable. (vm_submap_object): Point to vm_submap_object_store. (kentry_data_size): Initialize to arbitrary value. (kentry_count): Remove variable. (kentry_pagealloc): New function. (vm_map_setup): Likewise. (vm_map_create): Replace initialization with a call to vm_map_setup(). * vm/vm_map.h (vm_map_setup): New prototype. * vm/vm_kern.c (kernel_map_store): New variable. (kernel_map): Point to kernel_map_store. (kmem_suballoc): Remove function. Replaced with... (kmem_submap): New function. (kmem_init): Call vm_map_setup() instead of vm_map_create(). * vm/vm_kern.h (kmem_suballoc): Remove prototype. (kmem_submap): New prototype. * vm/vm_object.c (kernel_object_store): New variable. (kernel_object): Point to kernel_object_store. (vm_object_template): Change type from vm_object_t to struct vm_object. (_vm_object_setup): New function. (_vm_object_allocate): Replace initialization with a call to _vm_object_setup(). (vm_object_bootstrap): Don't allocate vm_object_template, and use it as a structure instead of a pointer. Initialize kernel_object and vm_submap_object with _vm_object_setup() instead of _vm_object_allocate(). * vm/vm_resident.c (vm_page_bootstrap): Don't initialize kentry_data_size. * device/ds_routines.c (device_io_map_store): New variable. (device_io_map): Point to device_io_map_store. (mach_device_init): Call kmem_submap() instead of kmem_suballoc(). * ipc/ipc_init.c (ipc_kernel_map_store): New variable. (ipc_kernel_map): Point to ipc_kernel_map_store.
2011-04-20Warn once when part of the kernel is lacking memorySamuel Thibault
* kern/printf.h (printf_once): New macro. * ipc/mach_port.c (mach_port_names, mach_port_get_set_status): Warn when returning KERN_RESOURCE_SHORTAGE. * vm/vm_kern.c: Include printf.h. (kmem_alloc, kmem_realloc, kmem_alloc_wired, kmem_alloc_aligned, kmem_alloc_pageable): Warn when failing. * vm/vm_resident.c (vm_page_grab_contiguous_pages): Warn when returning KERN_RESOURCE_SHORTAGE.
2009-06-182008-11-15 Shakthi Kannan <shakshurd@gmail.com>Samuel Thibault
* device/ds_routines.h (device_reference, device_deallocate): Add function prototypes. * kern/task.c (task_create): Moved unused i variable inside FAST_TAS. * vm/vm_map.h (vm_map_copy_page_discard): Add function prototype. * vm/vm_kern.c (projected_buffer_deallocate): Give &map->hdr instead of map to _vm_map_clip_start and _vm_map_clip_end functions. 2008-12-01 Samuel Thibault <samuel.thibault@ens-lyon.org> * device/device_emul.h (device_emulation_ops): Turn back reference, dealloc, dev_to_port, write_trap and writev_trap into taking a void*, as they do not always take a mach_device_t. * device/ds_routines.c (mach_device_emulation_ops): Cast mach_device_reference, mach_device_deallocate, mach_convert_device_to_port, device_write_trap and device_writev_trap to (void*) to make them accept a void* argument. * linux/pcmcia-cs/glue/ds.c (device_deallocate): Rename function into... (ds_device_deallocate): ... this. (dev_to_port): Call ds_device_deallocate instead of device_deallocate. (linux_pcmcia_emulation_ops): Use ds_device_deallocate instead of device_deallocate, cast mach_device_reference to (void*) to make it accept a void* argument.
2009-06-182008-07-20 Samuel Thibault <samuel.thibault@ens-lyon.org>Samuel Thibault
* linux/pcmcia-cs/glue/wireless_glue.h (schedule_task): Add parameter to Debugger() call. * kern/lock_mon.c (retry_simple_lock, retry_bit_lock): Likewise. * kern/machine.c (Debugger): Remove declaration. 2008-07-19 Barry deFreese <bddebian@comcast.net> * device/dev_hdr.h (dev_name_lookup, dev_set_indirection): Add prototypes. * device/dev_pager.c: Include <vm/vm_user.h>. * device/ds_routines.c: Likewise. * device/subrs.c: Likewise. * device/device_init.c: Include <device/tty.h>. * device/ds_routines.h (iowait): Add prototype. * device/net_io.h (net_kmsg_collect): Add prototype. * device/net_io.c (hash_ent_remove, net_free_dead_infp, net_free_dead_entp, bpf_validate, bpf_eq, net_add_q_info, bpf_match): Add forward declarations. * device/subrs.h: New header. * i386/i386/fpu.h: Include <sys/types.h>. Change <i386/thread.h> include to <kern/thread.h>. (fp_save, fp_load, fp_free, fpu_module_init, fpu_set_state, fpu_get_state, fpnoextflt, fpextovrflt, fpexterrflt, init_fpu): Add prototypes. * i386/i386/gdt.h (gdt_init): Add prototype. * i386/i386/io_map.c: Include <vm/pmap.h>. * vm/vm_kern.c: Likewise. * i386/i386/ktss.h (ktss_init): Add prototype. * i386/i386/ldt.h (ldt_init): Add prototype. * i386/i386/loose_ends.h: New header. * i386/i386/loose_ends.c (delay): Complete prototype. * i386/i386/model_dep.h (startrtclock): Add prototype. * i386/i386/pcb.h (load_context, stack_attach, stack_detach, switch_ktss): Add prototypes. * i386/i386/pic.h (form_pic_mask, picinit): Add prototypes. * i386/i386/pit.c: Include <i386/pic.h>. * i386/i386at/kd_mouse.c: Likewise. * i386/i386/pit.h (clkstart): Add prototype. * i386/i386/trap.c: Include <i386/fpu.h>, <intel/read_fault.h>, <vm/vm_fault.h>. * i386/i386/trap.h (interrupted_pc): Add prototype. * i386/i386/user_ldt.c: Include <i386/pcb.h>. * i386/i386at/autoconf.h: New header. * i386/i386at/com.h: New header. * i386/i386at/com.c: Include <i386at/autoconf.h>, <i386at/com.h>. * i386/i386at/idt.h (idt_init): Add prototype. * i386/i386at/int_init.h: New header. * i386/i386at/kd.c: Include <i386/loose_ends.h>. * kern/debug.c: Likewise. * i386/i386at/kd_event.c: Include <device/ds_routines.h>. * i386/i386at/kd_mouse.c: Likewise. * i386/i386at/kd_mouse.c: Include <device/subrs.h>, <i386at/com.h>. * i386/i386at/lpr.c: Include <i386at/autoconf.h> * i386/i386at/model_dep.c: Include: <i386/fpu.h>, <i386/gdt.h>, <i386/ktss.h>, <i386/ldt.h>, <i386/pic.h>, <i386/pit.h>, <i386at/autoconf.h>, <i386at/idt.h>, <i386at/int_init.h>, <i386at/kd.h>, <i386at/rtc.h>. * i386/i386at/rtc.h (readtodc, writetodc): Add prototypes. * i386/intel/pmap.h: Include <mach/vm_prot.h>. (pmap_bootstrap, pmap_unmap_page_zero, pmap_zero_page, pmap_copy_page, kvtophys): Add prototypes. * i386/intel/read_fault.h: New header. * kern/ast.h (ast_init, ast_check): Add prototypes. * kern/debug.c (Debugger): Move prototype to... * kern/debug.h (Debugger): ... here. * kern/eventcount.h (evc_notify_abort): Add prototype. * kern/ipc_mig.c: Include <kern/syscall_subr.h>, <kern/ipc_tt.h>, <device/ds_routines.h> * kern/ipc_mig.h: New header. * kern/ipc_tt.h (mach_reply_port): Add prototype. * kern/machine.h: New header. * kern/processor.h (pset_sys_bootstrap): Move prototype outside of MACH_HOST check. * kern/sched_prim.h (thread_bind, compute_priority, thread_timeout_setup): Add prototypes. * kern/startup.c: Include <kern/machine.h>, <machine/pcb.h>. * kern/syscall_subr.c: Include <kern/syscall_subr.h>. (thread_depress_abort): Remove prototype. * kern/syscall_subr.h: Include <sys/types.h>, <mach/mach_types.h> (thread_depress_abort): Add prototype. * kern/syscall_sw.c: Include: <kern/debug.h>. * kern/task.h (consider_task_collect): Add prototype. * kern/thread.c: Include <kern/eventcount.h>, <kern/ipc_mig.h>, <kern/syscall_subr.h>. * kern/thread.h (stack_collect): Add prototype. * linux/pcmcia-cs/glue/pcmcia_glue.h (Debugger): Remove prototype. * util/putchar.c: Include <device/cons.h>. * util/putchar.h: New header. * util/puts.c: Include <device/cons.h>, <util/putchar.h>. * vm/memory_object.c: Include <vm/vm_map.h>. (memory_object_data_provided): Move function below memory_object_data_supply definition. * vm/vm_init.c: Include <vm/vm_fault.h>. * vm/vm_kern.h (projected_buffer_in_range): Add prototype. * vm/vm_map.c: Include <vm/pmap.h>, <vm/vm_resident.h>. (vm_map_delete, vm_map_copyout_page_list, vm_map_copy_page_discard): Add forward declaration. * vm/vm_map.h (vm_map_copyin_object, vm_map_submap, _vm_map_clip_start, _vm_map_clip_end): Add prototypes. * vm/vm_pageout.c: Include <device/net_io.h>, <kern/task.h>, <machine/locore.h>. * vm/vm_resident.h: New header. * vm/vm_user.c: Include <vm/vm_kern.h>. * vm/pmap.h (pmap_pageable, pmap_map_bd): Add prototype.
2009-06-182008-07-15 Barry deFreese <bddebian@comcast.net>Samuel Thibault
* device/ds_routines.c: Include <machine/locore.h> * ipc/ipc_kmsg.c: Likewise. * kern/bootstrap.c: Likewise. * kern/exception.c: Likewise. * kern/ipc_mig.c: Likewise. * kern/sched_prim.c: Likewise. * kern/time_stamp.c: Likewise. * vm/vm_kern.c: Likewise.
2009-06-182006-11-11 Samuel Thibault <samuel.thibault@ens-lyon.org>Samuel Thibault
Fix a bunch of "unused variable" warnings. * device/ds_routines.c (ds_device_open): Remove unused `namebuf' variable. * device/kmsg.c (kmsgread): Remove unused `err' variable. * device/net_io.c (net_set_filter): Remove unused `j' variable. * i386/i386/pcb.c (curr_gdt, curr_ktss): Artificially use parameter of macro. * i386/i386/pic.c (picinit): Remove unused `i' variable. * i386/i386/pit.c (clkstart): Remove unused `flags' variable. * i386/i386/trap.c (kernel_trap): Remove unused `exc' variable. (user_trap): Remove unused `map' and `result' variables. (v86_assist): Remove unused `size' variable. * i386/i386at/i386at_ds_routines.c (ds_device_open): Remove unused `dev' variable. * i386/i386at/kd.c (kdintr): Remove unused `o_pri' variable. (kdcngetc): Remove unused `i' variable. * i386/i386at/kd_event.c (kbdgetstat, kbdsetstat): Remove unused `result' variable. * i386/i386at/kd_mouse.c (mousegetstat): Likewise. * i386/i386at/lpr.c (lprattach): Remove unused `tp' variable. (lprsetstat): Remove unused `dev_addr' and `s' variables. * i386/intel/pmap.c (pmap_bootstrap): Remove unused `pteva' variable. * ipc/ipc_kmsg.c (ipc_kmsg_copyin_body): Remove unused `mr' variable. * kern/bootstrap.c (boot_script_exec_cmd): Remove unused `boot_exec_info' and `user_map' variables. * vm/vm_kern.c (projected_buffer_map): Remove unused `object' variable.
2009-06-182006-11-10 Samuel Thibault <samuel.thibault@ens-lyon.org>Samuel Thibault
Put "for panic()" in ChangeLog, not in source code.
2009-06-182006-11-09 Barry deFreese <bddebian@comcast.net>Samuel Thibault
[task #5726 --- ``GCC built-in functions''] * include/printf.h: Move file... * kern/printf.h: ... here. * kern/debug.h (panic_init, panic): Add prototypes. * chips/busses.c: Don't include `printf.h', include `kern/printf.h' and `kern/debug.h'. * ddb/db_command.c: Likewise. * ddb/db_cond.c: Likewise. * ddb/db_output.c: Likewise. * device/cirbuf.c: Likewise. * device/cons.c: Likewise. * device/dev_name.c: Likewise. * device/dev_pager.c: Likewise. * device/device_init.c: Likewise. * device/dk_label.c: Likewise. * device/ds_routines.c: Likewise. * device/net_io.c: Likewise. * device/subrs.c: Likewise. * i386/i386/debug_i386.c: Likewise. * i386/i386/fpe_linkage.c: Likewise. * i386/i386/fpu.c: Likewise. * i386/i386/io_map.c: Likewise. * i386/i386/kttd_interface.c: Likewise. * i386/i386/mp_desc.c: Likewise. * i386/i386/pcb.c: Likewise. * i386/i386/pic.c: Likewise. * i386/i386/trap.c: Likewise. * i386/i386at/autoconf.c: Likewise. * i386/i386at/com.c: Likewise. * i386/i386at/i386at_ds_routines.c: Likewise. * i386/i386at/kd.c: Likewise. * i386/i386at/kd_event.c: Likewise. * i386/i386at/kd_mouse.c: Likewise. * i386/i386at/lpr.c: Likewise. * i386/i386at/model_dep.c: Likewise. * i386/intel/pmap.c: Likewise. * ipc/ipc_entry.c: Likewise. * ipc/ipc_hash.c: Likewise. * ipc/ipc_kmsg.c: Likewise. * ipc/ipc_mqueue.c: Likewise. * ipc/ipc_notify.c: Likewise. * ipc/ipc_object.c: Likewise. * ipc/ipc_port.c: Likewise. * ipc/ipc_pset.c: Likewise. * ipc/ipc_right.c: Likewise. * ipc/mach_msg.c: Likewise. * ipc/mach_port.c: Likewise. * ipc/mach_rpc.c: Likewise. * kern/act.c: Likewise. * kern/ast.c: Likewise. * kern/bootstrap.c: Likewise. * kern/debug.c: Likewise. * kern/eventcount.c: Likewise. * kern/exception.c: Likewise. * kern/host.c: Likewise. * kern/ipc_host.c: Likewise. * kern/ipc_kobject.c: Likewise. * kern/ipc_mig.c: Likewise. * kern/ipc_sched.c: Likewise. * kern/ipc_tt.c: Likewise. * kern/kalloc.c: Likewise. * kern/lock.c: Likewise. * kern/mach_clock.c: Likewise. * kern/machine.c: Likewise. * kern/pc_sample.c: Likewise. * kern/printf.c: Likewise. * kern/processor.c: Likewise. * kern/sched_prim.c: Likewise. * kern/server_loop.ch: Likewise. * kern/startup.c: Likewise. * kern/task.c: Likewise. * kern/thread.c: Likewise. * kern/thread_swap.c: Likewise. * kern/xpr.c: Likewise. * kern/zalloc.c: Likewise. * vm/memory_object.c: Likewise. * vm/vm_debug.c: Likewise. * vm/vm_fault.c: Likewise. * vm/vm_kern.c: Likewise. * vm/vm_map.c: Likewise. * vm/vm_object.c: Likewise. * vm/vm_object.h: Likewise. * vm/vm_pageout.c: Likewise. * vm/vm_resident.c: Likewise.
2009-06-182006-11-05 Barry deFreese <bddebian@comcast.net>Samuel Thibault
memcpy/memset cleanup. * include/string.h: New file. * include/mach/mig_support.h: Include `string.h'. [MACH_KERNEL] (bcopy): Remove extern declaration. [MACH_KERNEL] (memcpy): Remove macro. * device/cirbuf.c: Include `string.h'. (q_to_b, b_to_q): Replace bcopy() with memcpy() and bzero() with memset(), clean memcpy() and memset() invocation. * device/cons.c (cnputc): Likewise. * device/dev_pager.c (device_pager_data_request_done): Likewise. * device/ds_routines.c (device_write_get, ds_read_done): Likewise. * device/kmsg.c: Likewise. * device/net_io.c (net_filter, net_set_filter, net_getstat): Likewise. * i386/i386/fpu.c (fpu_set_state, fpu_get_state) fp_load) (fp_state_alloc): Likewise. * i386/i386/iopb.c (io_tss_init, i386_io_port_list): Likewise. * i386/i386/mp_desc.c (mp_desc_init): Likewise. * i386/i386/pcb.c (pcb_init, thread_setstatus) (thread_getstatus): Likewise. * i386/i386/phys.c (pmap_zero_page, pmap_copy_page, copy_to_phys) (copy_from_phys): Likewise. * i386/i386/trap.c (v86_assist): Likewise. * i386/i386/user_ldt.c (i386_set_ldt, i386_get_ldt): Likewise. * i386/i386at/immc.c (immc_cnputc): Likewise. * i386/i386at/kd_event.c (X_kdb_enter_init, X_kdb_exit_init): Likewise. * i386/intel/pmap.c (pmap_init, pmap_page_table_page_alloc) (pmap_create): Likewise. * ipc/ipc_entry.c (ipc_entry_grow_table): Likewise. * ipc/ipc_kmsg.c (ipc_kmsg_get_from_kernel) (ipc_kmsg_put_to_kernel): Likewise. * ipc/ipc_object.c (ipc_object_alloc, ipc_object_alloc_name): Likewise. * ipc/ipc_port.c (ipc_port_dngrow): Likewise. * ipc/ipc_space.c: Likewise. * ipc/mach_debug.c (mach_port_space_info) (mach_port_space_info): Likewise. * kern/act.c (act_create): Likewise. * kern/boot_script.c: Likewise. * kern/bootstrap.c: Likewise. * kern/eventcount.c (evc_init): Likewise. * kern/host.c (host_info, host_processor_sets): Likewise. * kern/lock.c (lock_init): Likewise. * kern/lock_mon.c (lock_info_clear): Likewise. * kern/mach_clock.c (mapable_time_init): Likewise. * kern/pc_sample.c (get_sampled_pcs): Likewise. * kern/processor.c (processor_set_things): Likewise. * kern/syscall_emulation.c (task_set_emulation_vector_internal) (task_get_emulation_vector, xxx_task_get_emulation_vector): Likewise. * kern/task.c (task_threads): Likewise. * kern/xpr.c (xprbootstrap): Likewise. * kern/zalloc.c (host_zone_info): Likewise. * vm/vm_debug.c (mach_vm_object_pages): Likewise. * vm/vm_kern.c (projected_buffer_allocate, copyinmap) (copyoutmap): Likewise. * vm/vm_object.c (vm_object_bootstrap): Likewise. * vm/vm_resident.c (vm_page_grab_contiguous_pages): Likewise.
2009-06-182006-01-31 Thomas Schwinge <tschwinge@gnu.org>Thomas Schwinge
Cleanup of GNU Mach's build system. The system dependend parts are now handeled by the respective Makefile and no longer by the top-level one. * configure, i386/configure, i386/linux/configure, linux/configure: Regenerated. * Makefile.in: Various cleanups. (mach/machine, mach_machine): Targets removed. (AWK, CC, CFLAGS, CPPFLAGS, DEFINES, INCLUDES, INSTALL, INSTALL_DATA) (INSTALL_PROGRAM, LD, MIG, MIGFLAGS, NM): Variables moved into Makerules.in. Do not include $(sysdep)/Makefrag anymore. (all, check, clean, distclean, mostlyclean, maintainer-clean, install) (install-headers, install-kernel): Recurse into the system dependend subdirectory. (check): Add a basic test using mbchk. (clean, distclean): Be more explicit in what to delete. ($(systype)/%): New target. (kernel.o): Incorporate the system dependend archive. (installed-sysdep-headers-names, $(installed-sysdep-headers-names)): Variable and target moved into the system dependend Makefile.in. (install-headers, mkheaderdirs): Don't care for the system dependend header files. (%.symc, %.symc.o, %.h, %_user.c, %_interface.h, %_server.c): Targets moved into Makerules.in. Inclusion of dependency files: Likewise. (%.migs_d, %.migu_d, %.migsh_d, %.miguh_d, make-deps, %.d): Likewise. Include Makerules. * Makerules.in: New file, mainly based on Makefile.in. * configure.in: Do not substitute cross_compiling and not explicitly substitute LDFLAGS. Check for cpp, ranlib, ar and mbchk. Care for the mach/machine symbolic link. Add Makerules as a config file. * i386/Makefile.in: Various cleanups. Merge i386/Makefrag and the system dependent stuff from Makefile.in into this file. (all, check, install, install-headers, install-kernel): Recurse into the system dependend subdirectory. (sysdep.o): transformed to the new target sysdep.a. (linux/linux.o): Target removed. (clean, distclean): Be more explicit in what to delete. (linux/%): New target. (install-headers): Install the system dependend header files. (mkheaderdirs): New target. Include the top-level Makerules. * i386/Makefrag: File removed. * i386/Makerules.in: New file. * i386/configure.in: Synchronize AC_INIT to the top-level definition. Do not check for ld and make. Add Makerules as a config file. * i386/linux/Makefile.in: Various cleanups. Replace linux-objs with objfiles. (check, install, install-headers, install-kernel): New empty targets. Don't care about linux-flags if no_deps is true. Inclusion of dependency files removed and instead... Include the top-level Makerules. * i386/linux/Makerules.in: New file. * i386/linux/configure.ac: Synchronize AC_INIT to the top-level definition. Do not check for gcc and ld. Do not explicitly substitute LDFLAGS. Add Makerules as a config file. * linux/configure.in: Synchronize AC_INIT to the top-level definition. Do not create directories using a dummy file. * linux/dummy.in: File removed. * ddb/db_access.h: Include <machine/vm_param.h> instead of "vm_param.h". * kern/bootstrap.c: Likewise. * kern/thread.c: Likewise. * vm/vm_kern.c: Likewise. * vm/vm_object.c: Likewise. * vm/vm_resident.c: Likewise.
1997-02-25Initial sourceThomas Bushnell