Konstantin Belousov 24bbc85bf6 The behaviour of the lockmgr going back at least to the 4.4BSD-Lite2 was ... to downgrade the exclusive lock to shared one when exclusive lock owner requested shared lock. New lockmgr panics instead. The vnode_pager_lock function requests shared lock on the vnode backing the OBJT_VNODE, and can be called when the current thread already holds an exlcusive lock on the vnode. For instance, it happens when handling page fault from the VOP_WRITE() uiomove that writes to the file, with the faulted in page fetched from the vm object backed by the same file. We then get the situation described above. Verify whether the vnode is already exclusively locked by the curthread and request recursed exclusive vnode lock instead of shared, if true. Reported by: gallatin Discussed with: attilio		2008-07-30 18:16:06 +00:00
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default_pager.c
device_pager.c	Preset a device object's alignment ("pg_color") based upon the	2008-05-17 16:26:34 +00:00
memguard.c	Provide the new argument to kmem_suballoc().	2008-05-10 23:39:27 +00:00
memguard.h	Improve memguard a bit:	2005-12-30 11:45:07 +00:00
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	Modify stack(9) stack_print() and stack_sbuf_print() routines to use new	2007-12-01 22:04:16 +00:00
redzone.h	Add buffer corruption protection (RedZone) for kernel's malloc(9).	2006-01-31 11:09:21 +00:00
swap_pager.c	Use the VM_ALLOC_INTERRUPT for the page requests when allocating memory	2008-07-11 11:27:42 +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	Reintroduce UMA_SLAB_KMAP; however, change its spelling to	2008-04-04 18:41:12 +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	Update stale comment on protecting UMA per-CPU caches: we now use	2007-05-09 22:53:34 +00:00
uma.h	Reintroduce UMA_SLAB_KMAP; however, change its spelling to	2008-04-04 18:41:12 +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	- Make SCHED_STATS more generic by adding a wrapper to create the	2008-04-17 04:20:10 +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	KERNBASE is not necessarily an address within the kernel map, e.g.,	2008-06-21 21:02:13 +00:00
vm_map.h	Generalize vm_map_find(9)'s parameter "find_space". Specifically, add	2008-05-10 18:55:35 +00:00
vm_meter.c	- Relax requirements for p_numthreads, p_threads, p_swtick, and p_nice from	2008-03-19 06:19:01 +00:00
vm_mmap.c	To date, our implementation of munmap(2) has required that the	2008-05-24 21:57:16 +00:00
vm_object.c	Allow VM object creation in ufs_lookup. (If vfs.vmiodirenable is set)	2008-05-20 19:05:43 +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	Essentially, neither madvise(..., MADV_DONTNEED) nor madvise(..., MADV_FREE)	2008-06-06 18:38:43 +00:00
vm_page.h	Rename vm_pageq_requeue() to vm_page_requeue() on account of its recent	2008-03-19 20:24:35 +00:00
vm_pageout.c	Rename vm_pageq_requeue() to vm_page_requeue() on account of its recent	2008-03-19 20:24:35 +00:00
vm_pageout.h	Make contigmalloc(9)'s page laundering more robust. Specifically, use	2007-11-25 20:37:29 +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	- Make SCHED_STATS more generic by adding a wrapper to create the	2008-04-17 04:20:10 +00:00
vm.h	Add the superpage reservation type.	2007-12-27 17:08:11 +00:00
vnode_pager.c	The behaviour of the lockmgr going back at least to the 4.4BSD-Lite2 was	2008-07-30 18:16:06 +00:00
vnode_pager.h