set bo_bsize on a bufobj.
This is a slight modification of the patch provided.
PR: 193146
Submitted by: Conrad Meyer <conrad.meyer@isilon.com>
Sponsored by: EMC Isilon Storage Division
reaches 1. The p_numthreads counter is decremented in thread_exit() by
a call to thread_unlink(). This means that the exiting threads may
still execute on other CPUs when thread_single(SINGLE_EXIT) returns.
As result, vmspace could be destroyed while paging structures are
still used on other CPUs by exiting threads.
Delay the return from thread_single(SINGLE_EXIT) until all threads are
really destroyed by thread_stash() after the last switch out. The
p_exitthreads counter already provides the required mechanism, move
the wait from the thread_wait() (which is called from wait(2) code)
into thread_single().
Reported by: many (as "panic: pmap active <addr>")
Reviewed by: alc, jhb
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Prior to the change it would always return initproc for non-traced processes.
This fixes ps apparently always returning 1 as ppid.
Pointy hat: mjg
Reported by: many
MFC after: 1 week
Add a separate field which exports tracer pid and add a new keyword
("tracer") for ps to display it.
This is a follow up to r270444.
Reviewed by: kib
MFC after: 1 week
Relnotes: yes
They are used when a panic occurs or when entering a DDB session for
instance.
cngrab() forces a vt-switch to the console window, no matter if the
original window is another terminal or an X session. However, cnungrab()
doesn't vt-switch back to the original window currently.
MFC after: 1 week
pre-r270321. Namely, the flags are preserved for SIG_DFL and SIG_IGN
dispositions.
Requested and reviewed by: jilles
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Traced processes always have the tracer set as the parent.
Utilize proc_realparent to obtain the right process when needed.
Reviewed by: kib
MFC after: 1 week
Previously they were uncoditionally reparented to init. In effect
it was possible that tracee was never returned to original parent.
Reviewed by: kib
MFC after: 1 week
aborted, allowing other threads to run. Without this change thread is just
rescheduled again, that was illustrated by provided test tool.
PR: 192926
Submitted by: eric@vangyzen.net
MFC after: 2 weeks
doing suspend check. This restores the pre-r251684 behaviour, to
retry once after the signal is detected.
PR: kern/192918
Submitted by: Elliott Rabe, Dell Inc., Eric van Gyzen <eric@vangyzen.net>
Obtained from: Dell Inc.
MFC after: 1 week
ignored or default, are not leaking. Apparently, there exists code
which relies on SA_SIGINFO not reported for SIG_DFL or SIG_IGN.
In kern_sigaction, ignore flags when resetting. Encapsulate the flag
and disposition testing into helper sigact_flag_test().
On exec, and when delivering signal with SA_RESETHAND flag set,
signals are reset automatically. Use new helper sigdflt(), which
removes duplicated code and corrects all flag bits for the signal.
For proc0, set sigintr bit for all ignored signals. Ignored signals
are consumed in tdsendsignal() and not delivered to the victim thread
at all.
Reported and tested by: royger
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
good example is socket options that aren't necessarily generic. To
this end, OSD is added to the socket structure and hooks are defined
for key operations on sockets. These are:
o soalloc() and sodealloc()
o Get and set socket options
o Socket related kevent filters.
One aspect about hhook that appears to be not fully baked is the return
semantics (the return value from the hook is ignored in hhook_run_hooks()
at the time of commit). To support return values, the socket_hhook_data
structure contains a 'status' field to hold return values.
Submitted by: Anuranjan Shukla <anshukla@juniper.net>
Obtained from: Juniper Networks, Inc.
header (Elf_Ehdr) to determine if a particular interpretor wants to
accept it or not. Use this mechanism to filter EABI arm on OABI arm
kernels, and vice versa. This method could also be used to implement
OABI on EABI arm kernels, if desired, or to allow a single mips kernel
to run o32, n32 and n64 binaries.
Differential Revision: https://reviews.freebsd.org/D609
UNIX systems, eg. MacOS X and Solaris. It uses Sun-compatible map format,
has proper kernel support, and LDAP integration.
There are still a few outstanding problems; they will be fixed shortly.
Reviewed by: allanjude@, emaste@, kib@, wblock@ (earlier versions)
Phabric: D523
MFC after: 2 weeks
Relnotes: yes
Sponsored by: The FreeBSD Foundation
page queue even when the allocation is not wired. It is
responsibility of the vm_page_grab() caller to ensure that the page
does not end on the vm_object queue but not on the pagedaemon queue,
which would effectively create unpageable unwired page.
In exec_map_first_page() and vm_imgact_hold_page(), activate the page
immediately after unbusying it, to avoid leak.
In the uiomove_object_page(), deactivate page before the object is
unlocked. There is no leak, since the page is deactivated after
uiomove_fromphys() finished. But allowing non-queued non-wired page
in the unlocked object queue makes it impossible to assert that leak
does not happen in other places.
Reviewed by: alc
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
One problem is inferior(9) looping due to the process tree becoming a
graph instead of tree if the parent is traced by child. Another issue
is due to the use of p_oppid to restore the original parent/child
relationship, because real parent could already exited and its pid
reused (noted by mjg).
Add the function proc_realparent(9), which calculates the parent for
given process. It uses the flag P_TREE_FIRST_ORPHAN to detect the head
element of the p_orphan list and than stepping back to its container
to find the parent process. If the parent has already exited, the
init(8) is returned.
Move the P_ORPHAN and the new helper flag from the p_flag* to new
p_treeflag field of struct proc, which is protected by proctree lock
instead of proc lock, since the orphans relationship is managed under
the proctree_lock already.
The remaining uses of p_oppid in ptrace(PT_DETACH) and process
reapping are replaced by proc_realparent(9).
Phabric: D417
Reviewed by: jhb
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 2 weeks
The MD allocators were very common, however there were some minor
differencies. These differencies were all consolidated in the MI allocator,
under ifdefs. The defines from machine/vmparam.h turn on features required
for a particular machine. For details look in the comment in sys/sf_buf.h.
As result no MD code left in sys/*/*/vm_machdep.c. Some arches still have
machine/sf_buf.h, which is usually quite small.
Tested by: glebius (i386), tuexen (arm32), kevlo (arm32)
Reviewed by: kib
Sponsored by: Netflix
Sponsored by: Nginx, Inc.
Replace a single soft updates thread with a thread per FFS-filesystem
mount point. The threads are associated with the bufdaemon process.
Reviewed by: kib
Tested by: Peter Holm and Scott Long
MFC after: 2 weeks
Sponsored by: Netflix
r262867 was described as fixing socket buffer checks for SOCK_SEQPACKET,
but also changed one of the SOCK_DGRAM code paths to use the new
sbappendaddr_nospacecheck_locked() function. This lead to SOCK_DGRAM
bypassing socket buffer limits.
It could be claimed that two things were reasonable protected by
Giant. One is vfsconf list links, which is converted to the new
dedicated sx vfsconf_sx. Another is vfsconf.vfc_refcount, which is
now updated with atomics.
Note that vfc_refcount still has the same races now as it has under
the Giant, the unload of filesystem modules can happen while the
module is still in use.
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 2 weeks
some parts of the checks are in fact redundand in the surrounding
code, and it is more clear what the conditions are by direct testing
of the flags. Two of the three macros were only used in assertions.
In vnlru_free(), all relevant parts of vholdl() were already inlined,
except the increment of v_holdcnt itself. Do not call vholdl() to do
the increment as well, this allows to make assertions in
vholdl()/vhold() more strict.
In v_incr_usecount(), call vholdl() before incrementing other ref
counters. The change is no-op, but it makes less surprising to see
the vnode state in debugger if interrupted inside v_incr_usecount().
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
