has device mem in it almost everywhere, we get warnings about
duplicated device almost everywhere. Comment it out, with a note
about why, so that we don't get those warnings.
so turn off UFS-specific hack that assumes so in ZFS case.
Before the change we can miss returning some directory entries to a
NFS client.
I believe that the hack should be moved to ufs_readdir(), but until we find
somebody who will do it, turn it off for ZFS in NFS server code.
Submitted by: rmacklem
Discussed with: rmacklem, mckusick
MFC after: 3 days
2MB of memory in the bootmem allocator for the SDK to use internally at a later
point. It'd be nice if there were some functions we could call before
allocating memory to let various facilities reserve some memory, but for now
this seems sufficient. Previously some unfortunate systems could give up all
(or at least most) of their memory to the kernel from bootmem, and then
allocating command queues for packet output and the like would fail later in
the boot process (which in turn would lead to crashes even later.)
Reported by: kan
table. The 'locked' attribute is used to circumvent the regular page table
locking for some special pages, with the result that including locked pages
here causes races when updating the stats.
access inbound/outbound events and associated data for established TCP
connections. The hooks only run if at least one hook function is registered
for the hook point, ensuring the impact on the stack is effectively nil when
no TCP Khelp modules are loaded. struct tcp_hhook_data is passed as contextual
data to any registered Khelp module hook functions.
- Add an OSD (Object Specific Data) pointer to struct tcpcb to allow Khelp
modules to associate per-connection data with the TCP control block.
- Bump __FreeBSD_version and add a note to UPDATING regarding to ABI changes
introduced by this commit and r216753.
In collaboration with: David Hayes <dahayes at swin edu au> and
Grenville Armitage <garmitage at swin edu au>
Sponsored by: FreeBSD Foundation
Reviewed by: bz, others along the way
MFC after: 3 months
small non fatal inconsistency. EBR may contain boot loader and sometimes
it just has some garbage data. Now this does not prevent FreeBSD to use
extended partitions. But since we do not support bootcode for EBR we mark
tables which have non empty boot area as corrupt. This does make them
readonly and we can not damage this data.
PR: kern/141235
MFC after: 1 month
This will be used by the incoming Enhanced RTT Khelp module.
Sponsored by: FreeBSD Foundation
Submitted by: David Hayes <dahayes at swin edu au>
Reviewed by: bz and others (as part of a larger patch)
MFC after: 3 months
categories: Those which can't build with PAE because they attempt to cast
a pointer to a bus_addr_t (mostly scsi drivers); and those which can't be
built with XEN because they conflict with something in xen-os.h (e.g., in
cxgb there is a conflicting definition of test_and_clear_bit).
MFC after: 1 week
to PMAP_SET_VA; this fixes a mutex-not-held panic when a process
which called mlock(2) exits, and parallels a change made in
pmap_pte 10 months ago (svn r204160).
Note: The locking in this code is utterly broken. We should not
be using the VM page queue mutex to protect the queue of pending
Xen page mapping hypervisor calls. Even if it made sense to do
so, this commit and r204160 introduce LORs between the vm page
queue mutex and PMAP2mutex.
(However, a possible deadlock is better than a guaranteed panic,
and this change will hopefully make life easier for whoever fixes
the Xen pmap locking in the future.)
PR: kern/140313
MFC after: 3 days
for RPC operations when it can. Since VFS_FHTOVP() currently
always gets an exclusively locked vnode and is usually called
at the beginning of each RPC, the RPCs for a given vnode will
still be serialized. As such, passing a lock type argument to
VFS_FHTOVP() would be preferable to doing the vn_lock() with
LK_DOWNGRADE after the VFS_FHTOVP() call.
Reviewed by: kib
MFC after: 2 weeks
NFS server, so that it can avoid calling VOP_ISLOCKED()
when the vnode is known to be locked. This will allow
LK_SHARED to be used for these cases, which happen to
be all the cases that can use LK_SHARED. This does not
fix any bug, but it reduces the number of calls to
VOP_ISLOCKED() and prepares the code so that it can be
switched to using LK_SHARED in a future patch.
Reviewed by: kib
MFC after: 2 weeks
readdir functions. In particular, get rid of two bogus
VOP_ISLOCKED() calls. Removing the VOP_ISLOCKED() calls
is the only actual bug fixed by this patch.
Reviewed by: kib
MFC after: 2 weeks
increasing directory offset cookies, disable the UFS related
loop that skips over directory entries at the beginning of
the block for the experimental NFS server. This loop is
required for UFS since it always returns directory entries
starting at the beginning of the block that
the requested directory offset is in. In discussion with pjd@
and mckusick@ it seems that this behaviour of UFS should maybe
change, with this fix being an interim patch until then.
This patch only fixes the experimental server, since pjd@ is
working on a patch for the regular server.
Discussed with: pjd, mckusick
MFC after: 5 days
table is present, then the acpi_ec(4) driver will allocate its resources
from nexus0 before the acpi0 device reserves resources for child devices.
Reviewed by: jkim
interrupt in the I/O APIC before moving it to a different CPU. If the
interrupt had been triggered by the I/O APIC after locking icu_lock but
before we masked the pin in the I/O APIC, then this could cause the
interrupt to be pending on the "old" CPU and it would finally trigger
after we had moved the interrupt to the new CPU. This could cause us to
panic as there was no interrupt source associated with the old IDT vector
on the old CPU. Dropping the lock after the interrupt is masked but
before it is moved allows the interrupt to fire and be handled in this
case before it is moved.
Tested by: Daniel Braniss danny of cs huji ac il
MFC after: 1 week
- Add flags CVWAIT_ABSTIME and CVWAIT_CLOCKID for umtx kernel based
condition variable, this should eliminate an extra system call to get
current time.
- Add sub-function UMTX_OP_NWAKE_PRIVATE to wake up N channels in single
system call. Create userland sleep queue for condition variable, in most
cases, thread will wait in the queue, the pthread_cond_signal will defer
thread wakeup until the mutex is unlocked, it tries to avoid an extra
system call and a extra context switch in time window of pthread_cond_signal
and pthread_mutex_unlock.
The changes are part of process-shared mutex project.
for manipulating pcb_flags. These inline functions are very similar to
atomic_set_char(9) and atomic_clear_char(9) but without unnecessary LOCK
prefix for SMP. Add comments about the rationale[1]. Use these functions
wherever possible. Although there are some places where it is not strictly
necessary (e.g., a PCB is copied to create a new PCB), it is done across
the board for sake of consistency. Turn pcb_full_iret into a PCB flag as
it is safe now. Move rarely used fields before pcb_flags and reduce size
of pcb_flags to one byte. Fix some style(9) nits in pcb.h while I am in
the neighborhood.
Reviewed by: kib
Submitted by: kib[1]
MFC after: 2 months
busy. This fixes a race where we can pass invalid mount point to VFS_VGET()
via vp->v_mount when exported file system was forcibly unmounted between
nfsrv_fhtovp() and VFS_VGET().
Reviewed by: kib
MFC after: 5 days
this is the only place that is different from all the other nfsrv_fhtovp()
consumers.
This simplifies nfsrv_fhtovp() a bit and also eliminates one
vn_lock/VOP_UNLOCK() cycle in case of NFSv3.
- Implement NFSRV_FLAG_BUSY flag for nfsrv_fhtovp() that tells it to leave
mount point busy.
Reviewed by: kib
MFC after: 5 days
STICK/STICK_COMPARE independently of the selected instruction set by
TICK_COMPARE so tick.c as of r214358 once again can be compiled with
gcc -mcpu=v9 for reference purposes.
so it can be used in code like this:
if (cond)
VFS_UNLOCK_GIANT(vfslocked);
else
; /* Do something else. */
Before the change, compiler couldn't decide on its own if else should be
applied to the 'if (cond)' or to the if statement inside VFS_UNLOCK_GIANT()
macro.
kernel address space in order to leave space for the buffer cache, pipes,
thread stacks, etc on machines with more physical memory until we take
advantage of ASI_ATOMIC_QUAD_LDD_PHYS on CPUs providing it so we don't need
to lock the kernel TSB pages into the dTLB, basically making the entire
64-bit kernel address space available on relevant machines.
Submitted by: alc
manual 1000BASE-T modes of DP83865 only work together with other National
Semiconductor PHYs.
- Spell 10BASE-T correctly
- Remove some redundant braces.
the parentheses around the location for simple fail points into the
location string. This makes the print on fail point set more
consistent between the two versions.
Also fix up fail.h a little for style(9): only use one of sys/param.h
and sys/types.h, and use the existing __XSTRING() macro instead of
rolling our own. Also fix up a few tabs on changed and nearby lines.
Lastly, since KFAIL_POINT_{BEGIN,END} are not meant for use outside
this file, just eliminate the macros entirely.
MFC after: 1 week
