Alan Cox da61b9a69e Use sf_buf_alloc() instead of vm_map_find() on exec_map to create the ...

ephemeral mappings that are used as the source for three copy
operations from kernel space to user space.  There are two reasons for
making this change: (1) Under heavy load exec_map can fill up causing
vm_map_find() to fail.  When it fails, the nascent process is aborted
(SIGABRT).  Whereas, this reimplementation using sf_buf_alloc()
sleeps.  (2) Although it is possible to sleep on vm_map_find()'s
failure until address space becomes available (see kmem_alloc_wait()),
using sf_buf_alloc() is faster.  Furthermore, the reimplementation
uses a CPU private mapping, avoiding a TLB shootdown on
multiprocessors.

Problem uncovered by: kris@
Reviewed by: tegge@
MFC after: 3 weeks

2005-12-16 18:34:14 +00:00

..

default_pager.c

/* -> /*- for license, minor formatting changes

2005-01-07 02:29:27 +00:00

device_pager.c

Add a comment to the effect that fictitious pages do not require the

2005-06-10 17:27:54 +00:00

memguard.c

Well, it seems that I pre-maturely removed the "All rights reserved"

2005-02-16 21:45:59 +00:00

memguard.h

Well, it seems that I pre-maturely removed the "All rights reserved"

2005-02-16 21:45:59 +00:00

phys_pager.c

/* -> /*- for license, minor formatting changes

2005-01-07 02:29:27 +00:00

pmap.h

Eliminate pmap_init2(). It's no longer used.

2005-11-20 06:09:49 +00:00

swap_pager.c

Make sure we have a bufobj before calling bstrategy().

2005-09-21 15:01:09 +00:00

swap_pager.h

/* -> /*- for license, minor formatting changes

2005-01-07 02:29:27 +00:00

uma_core.c

Change format string for u_int64_t to %ju from %llu, in order to use the

2005-10-20 21:28:31 +00:00

uma_dbg.c

Improve canonicalization of copyrights. Order copyrights by order of

2005-07-16 09:51:52 +00:00

uma_dbg.h

Improve canonicalization of copyrights. Order copyrights by order of

2005-07-16 09:51:52 +00:00

uma_int.h

Wrap inlines in uma_int.h in #ifdef _KERNEL so that uma_int.h can be

2005-08-04 10:03:53 +00:00

uma.h

As alc pointed out to me, vm_page.c 1.305 was incomplete: uma_startup()

2005-10-08 21:03:54 +00:00

vm_contig.c

Check for marker pages when scanning active and inactive page queues.

2005-08-12 18:17:40 +00:00

vm_extern.h

Use sf_buf_alloc() instead of vm_map_find() on exec_map to create the

2005-12-16 18:34:14 +00:00

vm_fault.c

Remove unneeded calls to pmap_remove_all(). The given page is not mapped.

2005-12-11 22:06:57 +00:00

vm_glue.c

Use sf_buf_alloc() instead of vm_map_find() on exec_map to create the

2005-12-16 18:34:14 +00:00

vm_init.c

Add the vm.exec_map_entries tunable and read-only sysctl, which controls

2005-04-25 19:22:05 +00:00

vm_kern.c

/* -> /*- for license, minor formatting changes

2005-01-07 02:29:27 +00:00

vm_kern.h

/* -> /*- for license, minor formatting changes

2005-01-07 02:29:27 +00:00

vm_map.c

Simplify vmspace_dofree().

2005-12-04 22:55:41 +00:00

vm_map.h

Eliminate unneeded preallocation at initialization.

2005-12-03 22:41:15 +00:00

vm_meter.c

Enable debug_mpsafevm on ia64 due to the severe functional regression

2005-05-08 23:56:16 +00:00

vm_mmap.c

Move execve's access time update functionality into a new

2005-10-12 06:56:00 +00:00

vm_object.c

Eliminate unneeded preallocation at initialization.

2005-12-03 19:37:29 +00:00

vm_object.h

- Add a new object flag "OBJ_NEEDSGIANT". We set this flag if the

2005-05-03 11:11:26 +00:00

vm_page.c

Assert that the page that is given to vm_page_free_toq() does not have any

2005-12-13 19:59:09 +00:00

vm_page.h

Don't perform a nested include of opt_vmpage.h if LIBMEMSTAT is defined,

2005-08-04 10:05:11 +00:00

vm_pageout.c

Reimplement the reclamation of PV entries. Specifically, perform

2005-11-09 08:19:21 +00:00

vm_pageout.h

/* -> /*- for license, minor formatting changes

2005-01-07 02:29:27 +00:00

vm_pageq.c

Introduce a procedure, pmap_page_init(), that initializes the

2005-06-10 03:33:36 +00:00

vm_pager.c

Normalize a significant number of kernel malloc type names:

2005-10-31 15:41:29 +00:00

vm_pager.h

Update some comments to reflect the change from spl-based to lock-based

2005-05-18 22:08:52 +00:00

vm_param.h

/* -> /*- for license, minor formatting changes

2005-01-07 02:29:27 +00:00

vm_unix.c

/* -> /*- for license, minor formatting changes

2005-01-07 02:29:27 +00:00

vm_zeroidle.c

Trim a couple of unneeded includes.

2005-09-29 19:13:52 +00:00

vm.h

- Change the vm_mmap() function to accept an objtype_t parameter specifying

2005-04-01 20:00:11 +00:00

vnode_pager.c

Rate limit vnode_pager_putpages printfs to once a second.

2005-11-01 23:00:24 +00:00

vnode_pager.h

Move the body of vop_stdcreatevobject() over to the vnode_pager under

2005-01-24 21:21:59 +00:00