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freebsd-dev/sys/vm
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Mark Johnston 3138cd3670 As a step towards the elimination of PG_CACHED pages, rework the handling 
of POSIX_FADV_DONTNEED so that it causes the backing pages to be moved to
the head of the inactive queue instead of being cached.

This affects the implementation of POSIX_FADV_NOREUSE as well, since it
works by applying POSIX_FADV_DONTNEED to file ranges after they have been
read or written.  At that point the corresponding buffers may still be
dirty, so the previous implementation would coalesce successive ranges and
apply POSIX_FADV_DONTNEED to the result, ensuring that pages backing the
dirty buffers would eventually be cached.  To preserve this behaviour in an
efficient manner, this change adds a new buf flag, B_NOREUSE, which causes
the pages backing a VMIO buf to be placed at the head of the inactive queue
when the buf is released.  POSIX_FADV_NOREUSE then works by setting this
flag in bufs that underlie the specified range.

Reviewed by:	alc, kib
Sponsored by:	EMC / Isilon Storage Division
Differential Revision:	https://reviews.freebsd.org/D3726
2015-09-30 23:06:29 +00:00
..
_vm_radix.h On all the architectures, avoid to preallocate the physical memory 2013-08-09 11:28:55 +00:00
default_pager.c Place VM objects on the object list when created and never remove them. 2015-05-08 19:43:37 +00:00
device_pager.c Place VM objects on the object list when created and never remove them. 2015-05-08 19:43:37 +00:00
memguard.c Add comments about CTLFLAG_RDTUN vs. TUNABLE_INT_FETCH. 2015-03-26 05:20:18 +00:00
memguard.h Replace kernel virtual address space allocation with vmem. This provides 2013-08-07 06:21:20 +00:00
phys_pager.c Place VM objects on the object list when created and never remove them. 2015-05-08 19:43:37 +00:00
pmap.h Properly sort the function declarations added in r286296 2015-08-05 10:48:32 +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 Place VM objects on the object list when created and never remove them. 2015-05-08 19:43:37 +00:00
swap_pager.c The swap pager is compatible with direct dispatch. It does its own 2015-09-08 17:47:56 +00:00
swap_pager.h Do not map the swap i/o pbufs if the geom provider for the swap 2013-03-19 14:39:27 +00:00
uma_core.c Exploit r288122 to address a cosmetic issue. Since the pages allocated 2015-09-26 17:45:10 +00:00
uma_dbg.c If INVARIANTS is specified, add ctor/dtor to junk memory if they are 2015-06-25 20:44:46 +00:00
uma_dbg.h
uma_int.h Revert r281451. It causes a panic/hang early in boot for a number of 2015-04-24 17:03:53 +00:00
uma.h The vmem callback to reclaim kmem arena address space on low or 2015-05-09 20:08:36 +00:00
vm_domain.c Add an initial NUMA affinity/policy configuration for threads and processes. 2015-07-11 15:21:37 +00:00
vm_domain.h Add an initial NUMA affinity/policy configuration for threads and processes. 2015-07-11 15:21:37 +00:00
vm_extern.h Add a new file operations hook for mmap operations. File type-specific 2015-06-04 19:41:15 +00:00
vm_fault.c Refinements to r281079's sequential access optimization: Prefetched pages, 2015-08-03 20:30:27 +00:00
vm_glue.c Make kstack_pages a tunable on arm, x86, and powepc. On i386, the 2015-08-10 17:18:21 +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 The conversion of kmem_alloc_attr() from operating on a vm map to a vmem 2015-09-26 22:57:10 +00:00
vm_kern.h - Add a statically allocated memguard arena since it is needed very early 2013-08-13 22:40:43 +00:00
vm_map.c Remove a check which caused spurious SIGSEGV on usermode access to the 2015-09-09 06:19:33 +00:00
vm_map.h Do not pretend that vm_fault(9) supports unwiring the address. Rename 2015-07-30 18:28:34 +00:00
vm_meter.c Remove the v_cache_min and v_cache_max sysctls. They are unused and have 2015-09-11 03:00:20 +00:00
vm_mmap.c Add a local variable initialization needed in the OBJT_DEFAULT case. 2015-07-05 22:26:19 +00:00
vm_object.c As a step towards the elimination of PG_CACHED pages, rework the handling 2015-09-30 23:06:29 +00:00
vm_object.h As a step towards the elimination of PG_CACHED pages, rework the handling 2015-09-30 23:06:29 +00:00
vm_page.c As a step towards the elimination of PG_CACHED pages, rework the handling 2015-09-30 23:06:29 +00:00
vm_page.h As a step towards the elimination of PG_CACHED pages, rework the handling 2015-09-30 23:06:29 +00:00
vm_pageout.c Correct a non-fatal error in vm_pageout_worker(). vm_pageout_worker() 2015-09-20 19:20:03 +00:00
vm_pageout.h
vm_pager.c - Make 'struct buf *buf' private to vfs_bio.c. Having a global variable 2015-07-29 02:26:57 +00:00
vm_pager.h o Un-inline vm_pager_get_pages(), vm_pager_get_pages_async(). 2015-06-17 22:44:27 +00:00
vm_param.h Remove the v_cache_min and v_cache_max sysctls. They are unused and have 2015-09-11 03:00:20 +00:00
vm_phys.c Add an initial NUMA affinity/policy configuration for threads and processes. 2015-07-11 15:21:37 +00:00
vm_phys.h Add an initial NUMA affinity/policy configuration for threads and processes. 2015-07-11 15:21:37 +00:00
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 Eliminate a redundant parameter to vm_radix_replace(). 2013-12-08 20:07:02 +00:00
vm_reserv.c Introduce a sysctl for reporting the number of fully populated reservations. 2015-08-06 21:27:50 +00:00
vm_reserv.h Refactor vm_page_alloc()'s interactions with vm_reserv_alloc_page() and 2013-05-12 16:50:18 +00:00
vm_unix.c Implement lockless resource limits. 2015-06-10 10:48:12 +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 rename scheduler->swapper and SI_SUB_RUN_SCHEDULER->SI_SUB_LAST 2013-07-24 09:45:31 +00:00
vnode_pager.c Refactor unmapped buffer address handling. 2015-07-23 19:13:41 +00:00
vnode_pager.h Merge from projects/sendfile: 2014-11-23 12:01:52 +00:00