It allows to avoid extra GEOM providers flapping without significant need.
Since GEOM got resize support, we don't need to reopen provider to get new
size. If provider was orphaned and no longer valid, ZFS should already
know that, and in such case reopen should be done in full as expected.
MFC after: 2 weeks
In case of vdev detach, causing top level mirror vdev destruction, leaf
vdev changes its GUID to one of the destroyed mirror, that creates race
condition when GUID in vdev label may not match one in the pool config.
This change replicates logic nuance of vdev_validate() by adding special
exception, matching the vdev GUID against the top level vdev GUID.
Since this exception is not completely reliable (may give false positives
if we fail to erase label on detached vdev), use it only as last resort.
Quick way to reproduce this scenario now is detach vdev from a pool with
enabled autoextend. During vdev detach autoextend logic tries to reopen
remaining vdev, that always fails now since in-memory configuration is
already updated, while on-disk labels are not yet.
MFC after: 2 weeks
Just using vm_paddr_t value with all bits set.
That should work as long as the type is unsigned.
While there, fix a couple of whitespace issues nearby.
MFC after: 1 week
X-MFC with: r307903
we have to refresh it ... always. This fixes problems reported in NetMap
with em(4) devices after conversion to extended descriptor format in
svn r293331.
Submitted by: luigi@
Reported by: franco@opnsense.org
MFC after: 2 days
The userspace case was already handled by pmap_allocpte(). For kernel
VA, page table page must exist, and demote cannot fail, so we need to
just call pmap_demote_pde(). Also note that due to the machine AS
layout, promotions in the KVA on i386 are highly unlikely, so this
change is mostly for completeness.
Reviewed by: alc, markj
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 2 weeks
Differential revision: https://reviews.freebsd.org/D8323
which also use buffer cache.
Most important addition to the code is the handling of filesystems
where the block size is less than the machine page size, which might
require reading several buffers to validate single page.
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 2 weeks
volume limits. In particular:
- Assert that usemap_alloc() and usemap_free() cluster number argument
is valid.
- In chainlength(), return 0 if cluster start is after the max cluster.
- In chainlength(), cut the calculated cluster chain length at the max
cluster.
- For true paranoia, after the pm_inusemap is calculated in
fillinusemap(), reset all bits in the array for clusters after the
max cluster, as in-use.
Reported and tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 2 weeks
Use the same logic to calculate the nominal CPU frequency from the P-state
MSRs on family 0x12, 0x15, and 0x16 CPUs as is used for family 0x10.
Family 0x14 was included in the original patch in the PR but I left that
out as the BIOS writer's guide for family 0x14 CPUs show a different layout
for the relevant MSR and include a different formulate for calculating the
frequency.
While here, simplify a few expressions and print out the family of
unsupported CPUs in hex rather than decimal.
PR: 212020
Submitted by: Anthony Jenkins <Scoobi_doo@yahoo.com>
MFC after: 1 month
Differential Revision: https://reviews.freebsd.org/D7587
Reject attempts to read from or memory map offsets in /dev/mem that are
beyond the maximum-supported physical address of the current CPU.
Reviewed by: kib
MFC after: 1 month
Differential Revision: https://reviews.freebsd.org/D7408
- use PCI_VENDOR and PCI_DEVICE ids from a publicly allocated range
(thanks to RedHat)
- export memory pool information through PCI registers
- improve mechanism for configuring passthrough on different hypervisors
Code is from Vincenzo Maffione as a follow up to his GSOC work.
illumos/illumos-gate@260af64db7260af64db7https://www.illumos.org/issues/3746
From the original change log:
It was possible for a reference to be added even with the lock held, and
for references added just after a lock release to be lost.
This bug was also independently found and reported in wesunsolve.net
issues 6985013 6995524.
In zrl_add(), always use an atomic operation to update the refcount.
The mutex in the ZRL only guarantees that wakeups occur for waiters on the
lock. It offers no protection against concurrent updates of the refcount.
The only refcount transition that is safe to perform without an atomic
operation is from ZRL_LOCKED back to 0, since this can only be performed
by the thread which has the ZRL locked.
Authored by: Will Andrews <will@freebsd.org>
Reviewed by: Boris Protopopov <bprotopopov@hotmail.com>
Reviewed by: Pavel Zakharov <pavel.zakha@gmail.com>
Reviewed by: Yuri Pankov <yuri.pankov@gmail.com>
Reviewed by: Justin T. Gibbs <gibbs@scsiguy.com>
Approved by: Matt Ahrens <mahrens@delphix.com>
Author: Youzhong Yang <yyang@mathworks.com>
PR: 204037
MFC after: 1 week
This paves way for more chimney sending buffer reorganization.
MFC after: 1 week
Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D8343
directory create and delete operations. If it ever finds a directory
with a link count less than 2, it panics. Thus, an rm -rf that
encounters a directory with a link count below 2 causes a kernel
panic. The proposed fix is to return the error EINVAL rather than
panicing. The effect is that the requested operation is not done,
but the system continues to run. At a more convenient later time,
the filesystem can be unmounted and cleaned (with fsck or journal
run). Once cleaned, the operation can be rerun to successful
completion.
This fix takes that approach. The panic message has been converted
into a uprintf(9) to provide the user with the inode number and
filesystem mount point of the offending directory and EINVAL is
returned for the operation.
The long (three year) delay in fixing this problem occurred because
the bug was misclassified when originally assigned and only this week
was found during a sweep of old unresolved bug reports.
PR: 180894
Reviewed by: kib
MFC after: 2 weeks
EFER_NXE is set in the EFER MSR by initializecpu() and must be set on all
CPUs in the system. When PG_NX support was added to PAE on i386, the
block to enable EFER_NXE was placed in a section of initializecpu() that
only runs if 'cpu == CPU_686'. During early boot, locore does an
initial pass to set cpu that sets it to CPU_686 on all CPUs later than
a Pentium. Later, printcpuinfo() adjusts the 'cpu' variable on
PII and later CPUs to one of CPU_PII, CPU_PIII, or CPU_P4. However,
printcpuinfo() is called after initializecpu() on the BSP, so the BSP
would enable EFER_NXE and pg_nx. The APs execute initializecpu() much
later after printcpuinfo() has run. The end result on a modern CPU was
that cpu was set to CPU_PIII when the APs invoked initializecpu(), so
they did not enable EFER_NXE. As a result, the APs would fault when
trying to access any pages marked with PG_NX set.
When booting a 2 CPU PAE kernel in bhyve this manifested as a hang before
single user mode. The attempt to execute /bin/init tried to copy out
the exec strings (argv, etc.) to a non-executable mapping while running
on the AP. The instruction kept faulting due to invalid bits in the PTE
in an infinite loop.
Fix this by moving the code to enable EFER_NXE out of the switch statement
on 'cpu' and always doing it if 'amd_feature' supports AMDID_NX.
MFC after: 2 weeks
Add missing fields ('sr' and 'mc_tls') to 'struct sigcontext'.
The kernel doesn't use 'struct sigcontext' but instead uses 'ucontext_t'
which includes 'mcontext_t' in 'struct sigframe' to build the signal frame.
As a result, this change is not an ABI change but simply making
'struct sigcontext' correct. Note that 'struct sigcontext' is only used
for "Traditional BSD style" signal handlers.
While here, rename the 'xxx' field to '__spare__' to match 'mcontext_t'.
Sponsored by: DARPA, AFRL
introduced with r261242. The useful and expected soisconnected()
call is done in tcp_do_segment().
Has been found as part of unrelated PR:212920 investigation.
Improve slightly (~2%) the maximum number of TCP accept per second.
Tested by: kevin.bowling_kev009.com, jch
Approved by: gnn, hiren
MFC after: 1 week
Sponsored by: Verisign, Inc
Differential Revision: https://reviews.freebsd.org/D8072
