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freebsd-dev/sys/vm
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Konstantin Belousov 641e2829b6 Extend the struct vm_page wire_count to u_int to avoid the overflow 
of the counter, that may happen when too many sendfile(2) calls are
being executed with this vnode [1].

To keep the size of the struct vm_page and offsets of the fields
accessed by out-of-tree modules, swap the types and locations
of the wire_count and cow fields. Add safety checks to detect cow
overflow and force fallback to the normal copy code for zero-copy
sockets. [2]

Reported by:	Anton Yuzhaninov <citrin citrin ru> [1]
Suggested by:	alc [2]
Reviewed by:	alc
MFC after:	2 weeks
2009-01-03 13:24:08 +00:00
..
default_pager.c
device_pager.c Save previous content of the td_fpop before storing the current 2008-09-26 14:50:49 +00:00
memguard.c Provide the new argument to kmem_suballoc(). 2008-05-10 23:39:27 +00:00
memguard.h
phys_pager.c Correct a copy and paste'o in phys_pager.c, we are talking about phys here 2007-10-30 14:48:13 +00:00
pmap.h Retire pmap_addr_hint(). It is no longer used. 2008-05-18 04:16:57 +00:00
redzone.c Fix REDZONE(9) on amd64 and perhaps other 64 bit targets -- ensure the space 2008-08-13 17:32:48 +00:00
redzone.h
swap_pager.c Move the code for doing out-of-memory grass from vm_pageout_scan() 2008-09-29 19:45:12 +00:00
swap_pager.h - Move 'struct swdevt' back into swap_pager.h and expose it to userland. 2007-02-07 17:43:11 +00:00
uma_core.c Remove unused variable nosleepwithlocks. 2008-08-23 12:40:07 +00:00
uma_dbg.c
uma_dbg.h
uma_int.h Update stale comment on protecting UMA per-CPU caches: we now use 2007-05-09 22:53:34 +00:00
uma.h Various comment nits, and typos. 2008-11-02 00:41:26 +00:00
vm_contig.c VOP_LOCK1() (and so VOP_LOCK()) and VOP_UNLOCK() are only used in 2008-01-13 14:44:15 +00:00
vm_extern.h Introduce a new parameter "superpage_align" to kmem_suballoc() that is 2008-05-10 21:46:20 +00:00
vm_fault.c Simplify the inner loop of vm_fault()'s delete-behind heuristic. 2008-03-16 17:37:19 +00:00
vm_glue.c If a thread that is swapped out is made runnable, then the setrunnable() 2008-08-05 20:02:31 +00:00
vm_init.c Introduce a new parameter "superpage_align" to kmem_suballoc() that is 2008-05-10 21:46:20 +00:00
vm_kern.c Eliminate stale comments from kmem_malloc(). 2008-07-18 17:41:31 +00:00
vm_kern.h Enable the creation of a kmem map larger than 4GB. 2008-07-05 19:34:33 +00:00
vm_map.c Resurrect shared map locks allowing greater concurrency during some map 2009-01-01 00:31:46 +00:00
vm_map.h Resurrect shared map locks allowing greater concurrency during some map 2009-01-01 00:31:46 +00:00
vm_meter.c A bunch of formatting fixes brough to light by, or created by the Vimage commit 2008-08-20 01:05:56 +00:00
vm_mmap.c Update mmap() comment: no more block devices, so no more block device 2008-10-22 16:50:12 +00:00
vm_object.c Fix printing of KASSERT message missed in r163604. 2008-12-21 16:56:13 +00:00
vm_object.h Allow VM object creation in ufs_lookup. (If vfs.vmiodirenable is set) 2008-05-20 19:05:43 +00:00
vm_page.c Extend the struct vm_page wire_count to u_int to avoid the overflow 2009-01-03 13:24:08 +00:00
vm_page.h Extend the struct vm_page wire_count to u_int to avoid the overflow 2009-01-03 13:24:08 +00:00
vm_pageout.c Instead of forcing vn_start_write() to reset mp back to NULL for the 2008-11-16 21:57:54 +00:00
vm_pageout.h Move the code for doing out-of-memory grass from vm_pageout_scan() 2008-09-29 19:45:12 +00:00
vm_pager.c Consider a scenario in which one processor, call it Pt, is performing 2007-08-05 21:04:32 +00:00
vm_pager.h
vm_param.h Fix CTL_VM_NAMES. 2007-10-16 11:32:57 +00:00
vm_phys.c Introduce vm_reserv_reclaim_contig(). This function is used by 2008-04-06 18:09:28 +00:00
vm_phys.h Modify vm_phys_unfree_page() so that it no longer requires the given 2007-12-20 22:45:54 +00:00
vm_reserv.c Introduce vm_reserv_reclaim_contig(). This function is used by 2008-04-06 18:09:28 +00:00
vm_reserv.h Introduce vm_reserv_reclaim_contig(). This function is used by 2008-04-06 18:09:28 +00:00
vm_unix.c
vm_zeroidle.c Fill in a few sysctl descriptions. 2008-08-03 14:26:15 +00:00
vm.h Add the superpage reservation type. 2007-12-27 17:08:11 +00:00
vnode_pager.c Decontextualize the couplet VOP_GETATTR / VOP_SETATTR as the passed thread 2008-08-28 15:23:18 +00:00
vnode_pager.h