random order instead of creation order.
Eliminates needless filesystem renames caused by removed parent snapshots
which subsequently causes many more errors.
PR: kern/172259
Submitted by: Steven Hartland
Reviewed by: pjd (mentor)
Approved by: pjd (mentor)
MFC after: 2 weeks
Introduce a new dataset aclmode setting "restricted" to protect ACL's
being destroyed or corrupted by a drive-by chmod.
illumos-gate 13889:a67716f16746
3254 add support in zfs for aclmode=restricted
References:
https://www.illumos.org/issues/3254
MFC after: 2 weeks
Import the zio nop-write improvement from Illumos. To reduce I/O,
nop-write omits overwriting data if the checksum (cryptographically
secure) of new data matches the checksum of existing data.
It also saves space if snapshots are in use.
It currently works only on datasets with enabled compression, disabled
deduplication and sha256 checksums.
IllumOS 13887:196932ec9e6a and 13888:7204b3392a58
3236 zio nop-write
References:
https://www.illumos.org/issues/3236
MFC after: 2 weeks
Illumos 13886:e3261d03efbf
3349 zpool upgrade -V bumps the on disk version number, but leaves
the in core version
References:
https://www.illumos.org/issues/3349
MFC after: 1 week
Illumos r13840:97fd5cdf328a:
3145 single-copy arc
3212 ztest: race condition between vdev_online() and spa_vdev_remove()
Illumos r13849:3468a95b27cd:
3258 ztest's use of file descriptors is unstable
There is one known issue: Some probes will display an error message along the
lines of: "Invalid address (0)"
I tested this with both a simple dtrace probe and dtruss on a few different
binaries on 32-bit. I only compiled 64-bit, did not run it, but I don't expect
problems without the modules loaded. Volunteers are welcome.
MFC after: 1 month
In particular, do not lock Giant conditionally when calling into the
filesystem module, remove the VFS_LOCK_GIANT() and related
macros. Stop handling buffers belonging to non-mpsafe filesystems.
The VFS_VERSION is bumped to indicate the interface change which does
not result in the interface signatures changes.
Conducted and reviewed by: attilio
Tested by: pho
doesn't exist on a dataset we are starting from. For example if we
have the following configuration:
tank
tank/foo
tank/foo@snap
tank/bar
tank/bar@snap
We can execute:
# zfs destroy -t tank@snap
eventhough tank@snap doesn't exit.
Unfortunately it is not possible to do the same with recursive rename:
# zfs rename -r tank@snap tank@pans
cannot open 'tank@snap': dataset does not exist
...until now. This change allows to recursively rename snapshots even if
snapshot doesn't exist on the starting dataset.
Sponsored by: rsync.net
MFC after: 2 weeks
The code builds a map of regions that were freed. On every write the
code consults the map and eventually removes ranges that were freed
before, but are now overwritten.
Freed blocks are not TRIMed immediately. There is a tunable that defines
how many txg we should wait with TRIMming freed blocks (64 by default).
There is a low priority thread that TRIMs ranges when the time comes.
During TRIM we keep in-flight ranges on a list to detect colliding
writes - we have to delay writes that collide with in-flight TRIMs in
case something will be reordered and write will reached the disk before
the TRIM. We don't have to do the same for in-flight writes, as
colliding writes just remove ranges to TRIM.
Sponsored by: multiplay.co.uk
This work includes some important fixes and some improvements obtained
from the zfsonlinux project, including TRIMming entire vdevs on pool
create/add/attach and on pool import for spare and cache vdevs.
Obtained from: zfsonlinux
Submitted by: Etienne Dechamps <etienne.dechamps@ovh.net>
impatient if we sent more than 2 INT signals. This fixes a bug where
we wouldn't see aggregations print on the command line if we Ctrl-C'd
a dtrace script or command line invocation.
MFC after: 2 weeks
Merge changes from illumos
906 dtrace depends_on pragma should search all library paths, not just the
current one
949 dtrace should only include the first instance of a library found on
its library path
Illumos Revisions: 13353:936a1e45726c
13354:2b2c36a81512
Reference:
https://www.illumos.org/issues/906https://www.illumos.org/issues/949
Tested by: Fabian Keil
Obtained from: Illumos
MFC after: 3 weeks
These probes are most useful when looking into the structures
they provide, which are listed in io.d. For example:
dtrace -n 'io:genunix::start { printf("%d\n", args[0]->bio_bcount); }'
Note that the I/O systems in FreeBSD and Solaris/Illumos are sufficiently
different that there is not a 1:1 mapping from scripts that work
with one to the other.
MFC after: 1 month
