bmilekic 1edc23feaa Make the slabrefzone, the zone from which we allocated slabs with ... internal reference counters, UMA_ZONE_NOFREE. This way, those slabs (with their ref counts) will be effectively type-stable, then using a trick like this on the refcount is no longer dangerous: MEXT_REM_REF(m); if (atomic_cmpset_int(m->m_ext.ref_cnt, 0, 1)) { if (m->m_ext.ext_type == EXT_PACKET) { uma_zfree(zone_pack, m); return; } else if (m->m_ext.ext_type == EXT_CLUSTER) { uma_zfree(zone_clust, m->m_ext.ext_buf); m->m_ext.ext_buf = NULL; } else { (*(m->m_ext.ext_free))(m->m_ext.ext_buf, m->m_ext.ext_args); if (m->m_ext.ext_type != EXT_EXTREF) free(m->m_ext.ref_cnt, M_MBUF); } } uma_zfree(zone_mbuf, m); Previously, a second thread hitting the above cmpset might actually read the refcnt AFTER it has already been freed. A very rare occurance. Now we'll know that it won't be freed, though. Spotted by: julian, pjd		2004-06-09 19:18:50 +00:00
..
default_pager.c	Access the swap_pagers' ->putpages() through swappagerops instead	2003-08-06 12:05:48 +00:00
device_pager.c	Push down Giant into vm_pager_get_pages(). The only get pages methods that	2004-04-23 06:10:58 +00:00
phys_pager.c	Zero the physical page only if it is invalid and not prezeroed.	2004-04-25 07:58:59 +00:00
pmap.h	- pmap_kenter_temporary() is unused by machine-independent code. Therefore,	2004-04-10 22:41:46 +00:00
swap_pager.c	Make vm_page's PG_ZERO flag immutable between the time of the page's	2004-05-06 05:03:23 +00:00
swap_pager.h	Remove advertising clause from University of California Regent's license,	2004-04-06 20:15:37 +00:00
uma_core.c	Make the slabrefzone, the zone from which we allocated slabs with	2004-06-09 19:18:50 +00:00
uma_dbg.c	Bring in mbuma to replace mballoc.	2004-05-31 21:46:06 +00:00
uma_dbg.h
uma_int.h	Bring in mbuma to replace mballoc.	2004-05-31 21:46:06 +00:00
uma.h	Fix a comment above uma_zsecond_create(), describing its arguments.	2004-06-01 01:36:26 +00:00
vm_contig.c	Remove advertising clause from University of California Regent's license,	2004-04-06 20:15:37 +00:00
vm_extern.h	To date, unwiring a fictitious page has produced a panic. The reason	2004-05-22 04:53:51 +00:00
vm_fault.c	To date, unwiring a fictitious page has produced a panic. The reason	2004-05-22 04:53:51 +00:00
vm_glue.c	In r1.190, vslock() and vsunlock() were bogusly made to do a "user wire"	2004-05-07 11:43:24 +00:00
vm_init.c	The demise of vm_pager_map_page() in revision 1.93 of vm/vm_pager.c permits	2004-04-08 19:08:49 +00:00
vm_kern.c	Bring in mbuma to replace mballoc.	2004-05-31 21:46:06 +00:00
vm_kern.h	Remove advertising clause from University of California Regent's license,	2004-04-06 20:15:37 +00:00
vm_map.c	Back out previous commit; it went to the wrong file.	2004-05-25 18:28:52 +00:00
vm_map.h	In cases where a file was resident in memory mmap(..., PROT_NONE, ...)	2004-04-24 03:46:44 +00:00
vm_meter.c	Remove advertising clause from University of California Regent's license,	2004-04-06 20:15:37 +00:00
vm_mmap.c	To handle orphaned character device vnodes properly in mmap(), check that	2004-05-11 10:26:37 +00:00
vm_object.c	MFS: vm_map.c rev 1.187.2.27 through 1.187.2.29, fix MS_INVALIDATE	2004-05-25 18:40:53 +00:00
vm_object.h	Remove advertising clause from University of California Regent's license,	2004-04-06 20:15:37 +00:00
vm_page.c	To date, unwiring a fictitious page has produced a panic. The reason	2004-05-22 04:53:51 +00:00
vm_page.h	Update stale comments regarding page coloring.	2004-06-05 21:06:42 +00:00
vm_pageout.c	Cache queue pages are not mapped. Thus, the pmap_remove_all() by	2004-05-12 04:10:35 +00:00
vm_pageout.h	Remove advertising clause from University of California Regent's license,	2004-04-06 20:15:37 +00:00
vm_pageq.c	Remove references to L1 in the comments, according to Alan they are	2004-06-07 19:33:05 +00:00
vm_pager.c	The demise of vm_pager_map_page() in revision 1.93 of vm/vm_pager.c permits	2004-04-08 19:08:49 +00:00
vm_pager.h	The demise of vm_pager_map_page() in revision 1.93 of vm/vm_pager.c permits	2004-04-08 19:08:49 +00:00
vm_param.h	Remove advertising clause from University of California Regent's license,	2004-04-06 20:15:37 +00:00
vm_unix.c	Remove advertising clause from University of California Regent's license,	2004-04-06 20:15:37 +00:00
vm_zeroidle.c	Record exactly where this file was copied from. It wasn't repo-copied so	2004-03-04 10:18:17 +00:00
vm.h	Remove advertising clause from University of California Regent's license,	2004-04-06 20:15:37 +00:00
vnode_pager.c	Make vm_page's PG_ZERO flag immutable between the time of the page's	2004-05-06 05:03:23 +00:00
vnode_pager.h	Remove advertising clause from University of California Regent's license,	2004-04-06 20:15:37 +00:00