fails to allocate MIPS page table pages. The current usage of VM_WAIT in
case of vm_phys_alloc_contig() failure is not correct, because:
"There is no guarantee that any of the available free (or cached) pages
after the VM_WAIT will fall within the range of suitable physical
addresses. Every time this function sleeps and a single page is freed
(or cached) by someone else, this function will be reawakened. With
a little bad luck, you could spin indefinitely."
We also add low and high parameters to vm_contig_grow_cache() and
vm_contig_launder() so that we restrict vm_contig_launder() to the range
of pages we are interested in.
Reported by: alc
Reviewed by: alc
Approved by: rrs (mentor)
GCC forwards the -N flag directly to ld. This flag is not documented and
not supported by (for example) Clang. Just use -Wl,-N.
Submitted by: Pawel Worach
file to be of maximum size.
- Add special handling required for SMI/VTOC8 disklabel partcode, i.e. avoid
overwriting the label when writing the bootstrap code to the partition
starting at 0 and install it to all partitions when the -i option is omitted
just like geom_sunlabel(4) and sunlabel(8) do by default.
- Add missing prototypes.
- Add const where applicable.
Reviewed by: marcel
MFC after: 3 days
cover the initial read by dqopen(). Assert that vnode is locked in
dqopen(). Remove VFS_LOCK_GIANT() from dqopen(), since quotaon() keeps
Giant locked if needed around the call.
different mount points, e.g. the nullfs vnode and the covered vnode
from the lower filesystem. In this case, existing assertion in
vop_rename_pre() may be triggered.
Check for vnode locks equiality instead of the vnodes itself to
not trip over the situation.
Submitted by: Mikolaj Golub <to.my.trociny@gmail.com>
Tested by: pho
MFC after: 2 weeks
doing bidirectional stress traffic on 82598.
Also a couple bug fixes from Michael Tuexen, thank you!!
Add a workaround into the header so that 8 REL can use
the driver (adds local copy of ALTQ fix).
MFC: in a few days
o fdtbus(4) - the main abstract bus driver for all FDT-compliant systems. This
is a direct replacement for the many incompatible bus drivers grouping
integrated peripherals on embedded platforms (like obio(4), ocpbus(4) etc.)
o simplebus(4) - bus driver representing ePAPR style 'simple-bus' node, which
is an umbrella device for most of the integrated peripherals on a typical
system-on-chip device.
o Other components (common routines library, PCI node processing helper
functions)
Reviewed by: imp
Sponsored by: The FreeBSD Foundation
fields that is always included in PCPU_MD_FIELDS. The macro is empty for
non-XEN kernels. This avoids duplicating non-XEN per-CPU fields in two
places. While here, remove several unused fields from the XEN-specific
structure.
Reviewed by: kmacy, gibbs
MFC after: 1 month
Use it to allow to tune sem_nsem_max at runtime, only when sem.ko
module is present in kernel.
Requested and tested by: amdmi3
Reviewed by: jhb
MFC after: 3 days
mapping but not changing the physical page being mapped, the wrong flags
were being inspected in order to determine whether or not to flush the
instruction cache. The effect of looking at the wrong flags was that the
instruction cache was never being flushed.
Reviewed by: marcel
The fix is a partial import and merge of OpenSolaris onnv revisions
8227:f7d7be9b1f56. and 9292:e112194b5b73
Approved by: pjd, delphij (mentor)
Obtained from: OpenSolaris (Bug ID 6798298)
MFC after: 3 days
When I pushed down the page queues lock into pmap_is_modified(), I created
an ordering dependence: A pmap operation that clears PG_WRITEABLE and calls
vm_page_dirty() must perform the call first. Otherwise, pmap_is_modified()
could return FALSE without acquiring the page queues lock because the page
is not (currently) writeable, and the caller to pmap_is_modified() might
believe that the page's dirty field is clear because it has not seen the
effect of the vm_page_dirty() call.
When I pushed down the page queues lock into pmap_is_modified(), I
overlooked one place where this ordering dependence is violated:
pmap_enter(). In a rare situation pmap_enter() can be called to replace a
dirty mapping to one page with a mapping to another page. (I say rare
because replacements generally occur as a result of a copy-on-write fault,
and so the old page is not dirty.) This change delays clearing PG_WRITEABLE
until after vm_page_dirty() has been called.
Fixing the ordering dependency also makes it easy to introduce a small
optimization: When pmap_enter() used to replace a mapping to one page with a
mapping to another page, it freed the pv entry for the first mapping and
later called the pv entry allocator for the new mapping. Now, pmap_enter()
attempts to recycle the old pv entry, saving two calls to the pv entry
allocator.
There is no point in setting PG_WRITEABLE on unmanaged pages, so don't.
If disk was missing on pool load or import and on next pool load or import
it was present, resilver wasn't started automatically and ZFS reported all disks
as ONLINE and healthy. Then, when another disk died, pool became unaccessible,
because if it was 2-way mirror or RAIDZ1 two vdevs were out of sync.
To fix the problem, start resilver automatically on pool load or import.
Obtained from: OpenSolaris
MFC after: 3 days
