Each struct dquot gets dq_lock mutex to protect dq_flags and to interlock
with DQ_LOCK. qhash, dqfreelist and dq.dq_cnt are protected by global
dqhlock mutex.
i_dquot array for inode is protected by lockmgr' vnode lock, corresponding
assert added to the dqget(). Access to struct ufsmount quota-related fields
(um_quotas and um_qflags) is protected by um_lock.
Tested by: Peter Holm
Reviewed by: tegge
Approved by: re (kensmith)
This work were not possible without enormous amount of help given by
Tor Egge and Peter Holm. Tor reviewed each version of patch, pointed out
numerous errors and provided invaluable suggestions. Peter did tireless
testing of the patch as it was developed.
complaining about lstat(2) failing. It's a bit scary to find the message
tar: /: Cannot stat: No such file or directory
printed while doing a backup.
MFC after: 1 week
According to IEEE Std 1003.1, 2004 "Whenever the pattern space is
written to standard output or a named file, sed shall immediately
follow it with a <newline>."
An attempt at the same correction might have been made with r1.3,
which is however identical with r1.2.
This is supposed to be a brief overview of the locking primatives.
It is not yet complete and contains many place-holders for information
I do not know.
The locking is getting so diverse that I've lost track of it all.
We need this page to keep outselves in sync with what the primitives do.
note.. not part of the build yet.
from ATAPI requests. If CAM debugging is enabled, also mark ATAPI
requests with ATA_R_DEBUG flag.
(atapi_cb): Report ATAPI timeouts to the CAM layer.
Fix incorrect debugging traces in the presence of ATAPI errors.
PR: kern/103602
MFC after: 2 weeks
CAM rescan if the ATAPI device entries have not changed.
The ATAPI bus may be reset for a variety of reasons, including any time an
ATAPI request times out. It is not necessary to rescan at the CAM level
in such a case, unless a device has appeared or disappeared, or has
otherwise changed.
PR: kern/103602
MFC after: 2 weeks
ATAPI request, do not clear the ATA_R_DEBUG flag. This allows a request
marked as requiring debug traces to produce these traces also during
the completion of the autosense processing.
Reviewed by: sos
MFC after: 2 weeks
tokens into the common isp_osinfo structure instead of being
in bus specific structures. This allows us to implement
a SYNC_REG MEMORYBARRIER call (using bus_space_barrier)
and also reduce the amount of bus specific wrapper structure
usages in isp_pci && isp_sbus.
MFC after: 3 days
* Only try to remove the existing item if we're not restoring a directory.
* If unlink fails, try rmdir next.
This should fix the broken --unlink option in bsdtar.
Thanks again to: Kris Kennaway, for beating up bsdtar on pointyhat.
late stages of unmount). On failure, the vnode is recycled.
Add insmntque1(), to allow for file system specific cleanup when
recycling vnode on failure.
Change getnewvnode() to no longer call insmntque(). Previously,
embryonic vnodes were put onto the list of vnode belonging to a file
system, which is unsafe for a file system marked MPSAFE.
Change vfs_hash_insert() to no longer lock the vnode. The caller now
has that responsibility.
Change most file systems to lock the vnode and call insmntque() or
insmntque1() after a new vnode has been sufficiently setup. Handle
failed insmntque*() calls by propagating errors to callers, possibly
after some file system specific cleanup.
Approved by: re (kensmith)
Reviewed by: kib
In collaboration with: kib
The code looks for all the loaded screensaver modules, tries to
kldunload them, and only loads the new one if kldstat's output shows
that there aren't any left. However, the regexp looking for modules
to unload was still searching according to the the old naming scheme,
splash_<name>.ko, instead of <name>_saver.ko.
MFC after: 3 days
