ext2fs - Clear CNP_PDIRUNLOCK flag after a lookup.
vop_compat_nresolve() unlocks the vnode when flag CNP_PDIRUNLOCK
is set, so either we clear the flag or avoid unlocking the vnode
after an ext2_lookup().
DragonFly-bug: http://bugs.dragonflybsd.org/issues/2454
Reported by: Skylar Hawk
Sync zoneinfo database with tzdata2012i from ftp://ftp.iana.org/tz/releases
* asia: Comment typo fix.
* northamerica: Cuba switched back to standard time on 2012-11-04, 01:00.
Sync zoneinfo database with tzdata2012h from ftp://ftp.iana.org/tz/releases
* asia:
Israel has new DST rules next year (thanks to Ephraim Silverberg).
Jordan stays on DST this winter (thanks to Steffen Thorsen).
* southamerica:
Bahia no longer has DST (thanks to Kelley Cook).
Tocantins has DST (thanks to Rodrigo Severo).
Sync zoneinfo database with tzdata2012g from ftp://ftp.iana.org/tz/releases
* asia (Asia/Gaza, Asia/Hebron): Fall transition was Sep 21, not Sep 28.
Thanks to Steffen Thorsen for this.
* australasia (Pacific/Apia): New DST rules for Western Samoa.
Thanks to Nicholas Pereira for the heads-up and to Robert Elz
for coding up the rules.
Sync zoneinfo database with tzdata2012f from ftp://ftp.iana.org/tz/releases
* australasia (Pacific/Fiji): Fiji DST is October 21 through January 20
this year. (Thanks to Steffen Thorsen.)
* Theory: Correct a typo.
hammer - Fix core dump during remote termination of mirror-stream
* Fix issue where remote-end hammer can core trying to fprintf() an error
message if a mirror-stream connection is lost unexpectedly.
kernel/hptmv: Fix the completion of a write.
What is intended here is to perform BUS_DMASYNC_POSTWRITE when a write
is completed, but the 'else if' had the wrong check.
kernel - Adjust UFS and HAMMER to use uiomovebp()
* Add uiomovebp(), a version of uiomove() which is aware of a locked bp
representing the to or from buffer and can work-around issues related
to VM faults causing recursions and deadlocks on the user buffer.
uiomovebp() does not yet detect or handle deadlocks. Implementing
deadlock handling will require a certain degree of finess related to
the vnode and bp locks and we don't want to have to do it unless we
actually deadlock. TODO.
* Adjust UFS, HAMMER, TMPFS, MSDOSFS, NFS, NTFS to use uiomovebp().
kernel - Change lockmgr LK_SHARED behavior to fix improper recursion return
* When obtaining a LK_SHARED lock in a situation where you already own the
lock LK_EXCLUSIVE, lockmgr would downgrade the lock to shared.
This creates a very serious problem when large procedural recursions get
a lock that is already being held exclusively but request a shared lock.
When these recursions return the original top level will find its lock is
no longer exclusive.
* This problem occured with vnode locks when a VOP_WRITE operation on a mmap'd
space causes a VM fault which then turns around and issues a read().
When the fault returns the vnode wound up locked shared instead of
exclusive.
* Fix the problem by NOT downgrading an exclusive lock to shared when
recursing on LK_SHARED. Simply add another count to the exclusive
lock.
kernel - Fix incorrect dirty/reprotect code in pageout
* vm_object_page_collect_flush() was trying to re-protect VM pages that
were still marked dirty after pageout I/O was initiated without owning
the BUSY bit on the page. This operation could race whatever I/O was
going on and multiple issues. Remove the re-protect.
Just don't do it. It's an unnecessary operation. We still re-set
PG_CLEANCHK on the page and that should be fine insofar as the pageout
daemon goes.
* Note that the pageout_flush code protects the VM pages properly (to
read-only) prior to initiating I/O .
* Should fix bug #2350
* Might be related to the wire-count bug considering that we were messing
with the page's pmap without owning the BUSY bit. Small chance.
kernel - Fix long-standing vm_map token panic
* Bug turned out to be an error path in vm_map_find().
* This bug ate a lot of hours from several people, but Antonio was able
to instrument the token path in a way that allowed us to narrow down
and locate the problem.
Submitted-by: tuxillo, vsrinivas
Debugging-by: tuxillo
kernel - Stop KTR logging during panic
* Stop all KTR logging when a panic occurs so the KTR buffer doesn't
get wiped out by events during the panic & core dump. This gives
us a KTR buf snapshot as of the panic entry.
kernel - Fix numerous procfs/ptrace issues (3)
* Add a safety spin-lock around adjustments to p_stops so it hopefully
interacts better with the event processing side of things.
kernel - Fix exit races which can lead to a corrupt p_children list
* There are a few races when getting multiple tokens where a threaded
process is wait*()ing for exiting children from multiple threads
at once.
Fix the problem by serializing the operation on a per-child basis,
and by using PHOLD/PRELE prior to acquiring the child's p_token.
Then re-check the conditions before accepting the child.
* There is a small chance this will also reduce or fix VM on-exit races
in i386, as this bug could result in an already-destroyed process
being pulled off by the racing wait*(). Maybe 25% chance.
Kernel - Fix numerous procfs/ptrace issues
* Fix interactions during exec and exit. This should fix truss
(bug 2313).
* Reset p_* fields related to tracing on last procfs close for the
process.
kernel - Fix two UFS+softupdates bugs
* The softdep sema_*() functions (the ones in ffs_softdep.c, not the sysv
functions) were not MPSAFE for the case where the passed interlock is
NULL. Use a spinlock for that case.
* getdirtybuf()'s semantics were broken and could return success even
after having released &lk with the bp still unlocked.
Fixing this should fix most of the reported softdep panics.
kernel -- ffs: Softdep lock and assorted fixes
* Remove interlocked_sleep; we can just use lksleep directly
* sema_get no longer eats the interlock passed in; all of its
callers were retaking the lock eventually or immediately.
* softdep was setting up a callout to wake itself in request_cleanup.
Switch to directly using timeout in lksleep for this purpose.
* Do not access inodedep structure outside of softdep lock in
softdep_update_inodeblock for buffer field.
* Remove prio field from semaphores; they were unused and the DFly
tsleep routines do not respect priority anyway.
* Do not release softdep lock before panic()ing
