- remove now unused field mnt_list.
- rename mount_list to mountlist and make it local to vfs_mount.c.
- make mountlist_lock local to vfs_mount.c.
Change pstat.c to retrieve vnodes by lru lists.
Don't count arguments that have WILLRELE/WILLPUT; count arguments
that are struct vnode *.
No functional change currently because it happens that every released
or put vnode argument comes first or after other ones.
Breaks file systems for which VOP_UNLOCK doesn't work on a reclaimed
vnode.
The only case in tree right now is sys/fs/union -- most file systems
use genfs_unlock, which does work on a reclaimed vnode.
Maybe we can work around this -- and still enable VOP_RECLAIM's
callees to assert lock ownership -- by having VOP_RECLAIM unlock the
vnode instead.
No bump because it wouldn't have been possible to acquire the lock in
VOP_RECLAIM anyway -- instant deadlock because vn_lock waits to
transition out of the RECLAIMING state first. Benefit is that we can
now assert ownership of the lock in any operations called by
VOP_RECLAIM.
Discussed on tech-kern:
https://mail-index.netbsd.org/tech-kern/2017/04/01/msg021751.html
by default, add sysctl vfs.wapbl.journal_iobufs to control it
this also removes need to allocate iobuf during commit, so it
might help to avoid deadlock during memory shortages like PR kern/47030
These operations allow to mark thread as a single-stepping one.
This allows to i.a.:
- single step and emit a signal (PT_SETSTEP & PT_CONTINUE)
- single step and trace syscall entry and exit (PT_SETSTEP & PT_SYSCALL)
The former is useful for debuggers like GDB or LLDB. The latter can be used
to singlestep a usermode kernel. These examples don't limit use-cases of
this interface.
Define PT_*STEP only for platforms defining PT_STEP.
Add new ATF tests setstep[1234].
These ptrace(2) operations first appeared in FreeBSD.
Sponsored by <The NetBSD Foundation>
calling the operation on the lower vnode.
Replace vi_lock with a rw_obj and change layered file systems
to share the lock with the lower vnode.
Layered file systems now use genfs_lock()/_unlock/_islocked().
Welcome to 7.99.67
Pointed out by Christous Zoulas that ELF_AUX_ENTRIES * sizeof(AuxInfo)
assumption is incomplete. There is emulation code that can use different
values (smaller and larger).
Previously PT_DUMPCORE and PIOD_READ_AUXV and regular core dumping retrieved
the vector of AuxInfo {a_type, a_v} + MAXPATHLEN + ALIGN(1).
The extra data is not actually needed in the returned chunk. It can be
retrieved with PT_READ_I operations and it's the preferred way to access
them as the AuxInfo fields contain pointers (void* format) to them.
This changes the behavior of the kernel, no stable releases are affected
with this move. Current software is not affected as other systems already
stop generating data on AT_NULL. This streamlines the NetBSD behavior with
other ELF format OSes. This move also simplifies determination if we got
all the needed data inside the debugger and we no longer need to eliminate
the unneeded chunk at the end.
Sponsored by <The NetBSD Foundation>
1. Supply the siginfo we expect TRAP_SC{E,X} to process_stoptrace() and set it.
2. Change the second argument of proc_stop from notify, to now meaning that
we want to stop right now. Wait in process_stoptrace until that has happened.
3. While here, fix the locking order in process_stoptrace().
