Konstantin Belousov afe55ca373 Implement 'fast path' for the vm page fault handler. Or, it could be ... called a scalable path. When several preconditions hold, the vm object lock for the object containing the faulted page is taken in read mode, instead of write, which allows parallel faults processing in the region. Namely, the fast path is taken when the faulted page already exists and does not need copy on write, is already fully valid, and not busy. For technical reasons, fast path is avoided when the fault is the first write on the vnode object, or when the fault is for wiring or debugger read or write. On the fast path, pmap_enter(9) is passed the PMAP_ENTER_NOSLEEP flag, since object lock is kept. Pmap might fail to create the entry, in which case the fallback to slow path is performed. Reviewed by: alc Tested by: pho (previous version) Hardware provided and hosted by: The FreeBSD Foundation and Sentex Data Communications Sponsored by: The FreeBSD Foundation MFC after: 2 week		2014-08-15 07:30:14 +00:00
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_vm_radix.h
default_pager.c
device_pager.c
memguard.c	Pull in r267961 and r267973 again. Fix for issues reported will follow.	2014-06-28 03:56:17 +00:00
memguard.h
phys_pager.c
pmap.h	Change pmap_enter(9) interface to take flags parameter and superpage	2014-08-08 17:12:03 +00:00
redzone.c	Pull in r267961 and r267973 again. Fix for issues reported will follow.	2014-06-28 03:56:17 +00:00
redzone.h
sg_pager.c
swap_pager.c
swap_pager.h
uma_core.c	Pull in r267961 and r267973 again. Fix for issues reported will follow.	2014-06-28 03:56:17 +00:00
uma_dbg.c
uma_dbg.h
uma_int.h
uma.h
vm_extern.h	Handle wiring failures in vm_map_wire() with the new functions	2014-08-02 16:10:24 +00:00
vm_fault.c	Implement 'fast path' for the vm page fault handler. Or, it could be	2014-08-15 07:30:14 +00:00
vm_glue.c	If vm_page_grab() allocates a new page, the page is not inserted into	2014-08-13 05:44:08 +00:00
vm_init.c	Pull in r267961 and r267973 again. Fix for issues reported will follow.	2014-06-28 03:56:17 +00:00
vm_kern.c	Change pmap_enter(9) interface to take flags parameter and superpage	2014-08-08 17:12:03 +00:00
vm_kern.h
vm_map.c	Rewrite a loop in vm_map_wire() so that gcc doesn't think that the variable	2014-08-02 17:58:20 +00:00
vm_map.h	Add MAP_EXCL flag for mmap(2). It should be combined with MAP_FIXED,	2014-06-19 05:00:39 +00:00
vm_meter.c
vm_mmap.c	Remove ia64.	2014-07-07 00:27:09 +00:00
vm_object.c	When unwiring a region of an address space, do not assume that the	2014-07-26 18:10:18 +00:00
vm_object.h	Add wrappers to assert that vm object is unlocked and for try upgrade.	2014-08-06 19:30:35 +00:00
vm_page.c	Adapt vm_page_aflag_set(PGA_WRITEABLE) to the locking of	2014-08-09 05:00:34 +00:00
vm_page.h	Adapt vm_page_aflag_set(PGA_WRITEABLE) to the locking of	2014-08-09 05:00:34 +00:00
vm_pageout.c	Remove ia64.	2014-07-07 00:27:09 +00:00
vm_pageout.h
vm_pager.c
vm_pager.h	The vm_pager_page_unswapped() pager op is only implemented for the	2014-08-06 19:34:03 +00:00
vm_param.h
vm_phys.c	vm_phys: improve robustness of fictitious ranges	2014-08-05 10:29:01 +00:00
vm_phys.h
vm_radix.c	Pull in r267961 and r267973 again. Fix for issues reported will follow.	2014-06-28 03:56:17 +00:00
vm_radix.h
vm_reserv.c	Correct a bug in the management of the population map on big-endian	2014-06-11 16:11:12 +00:00
vm_reserv.h
vm_unix.c	Remove ia64.	2014-07-07 00:27:09 +00:00
vm_zeroidle.c	Pull in r267961 and r267973 again. Fix for issues reported will follow.	2014-06-28 03:56:17 +00:00
vm.h
vnode_pager.c
vnode_pager.h