src/sys/vm, branch release/4.8.0

primarily MFC vm_map.c 1.275. Also pull-in vm_waitproc() and

2003-01-13T22:51:17Z

cpu_wait() changes from current. This should close reference count races with the vmspace structure. There is still a shmexit() race (structure never freed) which will be addressed in a day or two with a fix MFC from current.

MFC improved VM object flushing code, allowing the syncer to cluster

2002-12-31T09:34:51Z

dirty VM pages (dirtied via mmap()) that back a file. Please see the log entry for rev 1.250 of vm_object.c.

MFC use correct flag name in call to vm_pager_put_pages(). It just happened

2002-12-29T18:21:04Z

to have the same value as the previously (incorrect) name. No operational changes.

MFC ELF coredump handling fixes. Do not skip read-only pages unrelated

2002-12-28T19:49:41Z

to the binary image. Use NOCORE to differentiate between the two. Introduce a debug.elf_legacy_coredump sysctl which, if set, reverts to the old behavior. See the log message in sys/kern/imgact_elf.c 1.133. PR: kern/45994

stable-only commit (does not apply to -current). Allow a zone to be tagged

2002-10-10T19:50:16Z

to panic the machine if the zone allocation fails. This will be used to catch zone allocations that fail that code assumes always succeed (can occur if we run out of KVM).

MFC fix vm_map_entry collisions and buffer_map collisions that can occur

2002-10-10T19:28:22Z

under very heavy memory pressure. There are places where the kernel can block where it normally does not block which were not properly handled. These fixes have been heavily tested. They are based on work Alan and Tor have done in -current but are not a direct MFC. They are not entirely optimal but they should be solid. Add a new sysctl counter, vm.v_intrans_coll and vm.v_intrans_wait which indicates how many times a vm_map_entry collision has been detected and how many times vm_map code had to block waiting for a collision to clear. Reviewed by: alc, tegge Testing by: "Marc G. Fournier" (note: there are still unresolved bugs on Marc's boxes unrelated to this patch).

MFC: 1.268

2002-09-26T17:32:01Z

Modify vm_map_clean() (and thus the msync(2) system call) to support invalidation of cached pages for objects of type OBJT_DEVICE. Submitted by: Christian Zander Reviewed by: alc Approved by: re (jhb)

Reduce the maximum KVA reserved for swap meta structures from 70 to 32 MB.

2002-08-31T21:15:55Z

Reduce the swap meta calculation by a factor of 2, it's still massive overkill.

Unconditionally initialise z->znext, and remove the zone from the

2002-08-12T23:39:08Z

list of all zones if we fail to allocate KVA for it in zinitna(). Apparently this fixes panics while running sysctl on large-memory machines. This code is not present in -current. PR: kern/36605 Submitted by: Brian Buchanan

MFC RLIMIT_VMEM resource Stage I - limit the total virtual memory use for

2002-07-02T20:06:25Z

a process (exec() to be handled in Stage II).