freebsd-skq/sys/vm
Konstantin Belousov 1771e987ca Do not sleep in vm_wait() if pagedaemon did not yet started. Panic instead.
Requests which cannot be satisfied by allocators at boot time often
have unrealizable parameters.  Waiting for the pagedaemon' start would
hang the boot if done in the thread0 context and just never succeed if
executed from another thread.  In fact, for very early stages, sleep
attempt panics with obscure diagnostic about the scheduler state, and
explicit panic in vm_wait() makes the investigation much shorter by
cut off the examination of the thread and scheduler.

Theoretically, some subsystem might grab a resource to exhaustion, and
free it later in the boot process.  If this unlikely scenario does
appear for real, the way to diagnose the trouble can be revisited.

Reported by:	emaste
Reviewed by:	markj
Sponsored by:	The FreeBSD Foundation
MFC after:	2 weeks
Differential revision:	https://reviews.freebsd.org/D8421
2016-11-04 12:58:50 +00:00
..
_vm_radix.h
default_pager.c A change to KPI of vm_pager_get_pages() and underlying VOP_GETPAGES(). 2015-12-16 21:30:45 +00:00
device_pager.c Split long line instead of unindenting it. Add KASSERT() verifying 2016-10-30 18:04:11 +00:00
memguard.c Include sys/_task.h into uma_int.h, so that taskqueue.h isn't a 2016-02-09 20:22:35 +00:00
memguard.h
phys_pager.c sys: use our roundup2/rounddown2() macros when param.h is available. 2016-04-21 19:57:40 +00:00
pmap.h Various changes to pmap_ts_referenced() 2016-09-10 16:49:25 +00:00
redzone.c
redzone.h
sg_pager.c Plug a vm_page leak introduced in r292373. 2016-02-05 19:35:53 +00:00
swap_pager.c Respect the caller's hints when performing swap readahead. 2016-09-04 00:25:49 +00:00
swap_pager.h
uma_core.c Simplify keg_drain() a bit by using LIST_FOREACH_SAFE. 2016-10-20 23:10:27 +00:00
uma_dbg.c Fix memguard(9) in kernels with INVARIANTS enabled. 2016-06-01 22:31:35 +00:00
uma_dbg.h Move uma_dbg_alloc() and uma_dbg_free() into uma_core.c, which allows 2016-02-03 22:02:36 +00:00
uma_int.h Autotune the number of pages set aside for UMA startup based on the number 2016-07-07 18:37:12 +00:00
uma.h Replace a number of conflations of mp_ncpus and mp_maxid with either 2016-07-06 14:09:49 +00:00
vm_domain.c Move vm_domain_rr_selectdomain() under #ifdef VM_NUMA_ALLOC. 2016-05-10 22:25:55 +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 Various cleanups to the main function for AIO kernel processes: 2016-01-19 21:37:51 +00:00
vm_fault.c In vm_fault()'s loop over the shadow chain, move a comment describing our 2016-11-03 16:44:55 +00:00
vm_glue.c Eliminate unneeded vm_page_xbusy() and vm_page_xunbusy() operations when 2016-08-14 22:00:45 +00:00
vm_init.c Conditionally move initial vfs bio alloc above 4G 2016-10-03 13:23:43 +00:00
vm_kern.c Introduce a new mechanism for relocating virtual pages to a new physical 2015-12-19 18:42:50 +00:00
vm_kern.h
vm_map.c Change the type of the map entry's next_read field from a vm_pindex_t to a 2016-07-07 20:58:16 +00:00
vm_map.h Change the type of the map entry's next_read field from a vm_pindex_t to a 2016-07-07 20:58:16 +00:00
vm_meter.c Remove support for idle page zeroing. 2016-09-03 20:38:13 +00:00
vm_mmap.c When mmap(2) is used with a vnode, capture vnode attributes in the 2016-07-10 11:49:10 +00:00
vm_object.c Fix a race in vm_page_busy_sleep(9). 2016-10-13 14:41:05 +00:00
vm_object.h The vmtotal sysctl handler marks active vm objects to calculate 2016-06-21 17:49:33 +00:00
vm_page.c Do not sleep in vm_wait() if pagedaemon did not yet started. Panic instead. 2016-11-04 12:58:50 +00:00
vm_page.h Export vm_page_xunbusy_maybelocked(). 2016-10-17 08:14:23 +00:00
vm_pageout.c Make the page daemon's notion of what kind of pass is being performed 2016-10-05 17:32:06 +00:00
vm_pageout.h The flag "vm_pages_needed" has long served two distinct purposes: (1) to 2016-05-27 19:15:45 +00:00
vm_pager.c Add BUF_TRACKING and FULL_BUF_TRACKING buffer debugging 2016-10-31 23:09:52 +00:00
vm_pager.h Remove vm_pager_has_page() declaration. It is not too useful since 2016-10-30 20:38:57 +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 Remove support for idle page zeroing. 2016-09-03 20:38:13 +00:00
vm_phys.h Remove support for idle page zeroing. 2016-09-03 20:38:13 +00:00
vm_radix.c Cleanup redundant parenthesis from existing howmany()/roundup() macro uses. 2016-04-22 16:57:42 +00:00
vm_radix.h
vm_reserv.c Introduce a new mechanism for relocating virtual pages to a new physical 2015-12-19 18:42:50 +00:00
vm_reserv.h Introduce a new mechanism for relocating virtual pages to a new physical 2015-12-19 18:42:50 +00:00
vm_unix.c Implement lockless resource limits. 2015-06-10 10:48:12 +00:00
vm.h Add new bus methods for mapping resources. 2016-05-20 17:57:47 +00:00
vnode_pager.c Fix incorrect assertion that could miss overflows. 2016-10-19 19:50:09 +00:00
vnode_pager.h A change to KPI of vm_pager_get_pages() and underlying VOP_GETPAGES(). 2015-12-16 21:30:45 +00:00