This commit reworks the zed_notify_email() function to allow
configuration of the mail executable and command-line arguments.
ZED_EMAIL_PROG specifies the name or path of the executable responsible
for sending notifications via email. This variable defaults to "mail".
ZED_EMAIL_OPTS specifies command-line options passed to ZED_EMAIL_PROG.
The following keyword substitutions are performed:
- @ADDRESS@ is replaced with the recipient email address(es)
- @SUBJECT@ is replaced with the notification subject
This variable defaults to "-s '@SUBJECT@' @ADDRESS@".
ZED_EMAIL_ADDR replaces ZED_EMAIL (although the latter is retained
for backward compatibility). This variable can contain multiple
addresses as long as they are delimited by whitespace.
Signed-off-by: Chris Dunlap <cdunlap@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes#3634Closes#3631
This commit fixes the two adjacent spaces that appear in zed_log_err()
messages when ZEVENT_EID is undefined.
Signed-off-by: Chris Dunlap <cdunlap@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
This brings the behavior of arc_memory_throttle() back in sync with
illumos. The updated memory throttling policy roughly goes like this:
* Never throttle if more than 10% of memory is free. This threshold
is configurable with the zfs_arc_lotsfree_percent module option.
* Minimize any throttling of kswapd even when free memory is below
the set threshold. Allow it to write out pages as quickly as
possible to help alleviate the memory pressure.
* Delay all other threads when free memory is below the set threshold
in order to avoid compounding the memory pressure. Buffers will be
evicted from the ARC to reduce the issue.
The Linux specific zfs_arc_memory_throttle_disable module option has
been removed in favor of the existing zfs_arc_lotsfree_percent tuning.
Setting zfs_arc_lotsfree_percent=0 will have the same effect as
zfs_arc_memory_throttle_disable and it was therefore redundant.
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes#3637
While Linux doesn't provide detailed information about the state of
the VM it does provide us total free pages. This information should
be incorporated in to the arc_available_memory() calculation rather
than solely relying on a signal from direct reclaim. Conceptually
this brings arc_available_memory() back in sync with illumos.
It is also desirable that the target amount of free memory be tunable
on a system. While the default values are expected to work well
for most workloads there may be cases where custom values are needed.
The zfs_arc_sys_free module option was added for this purpose.
zfs_arc_sys_free - The target number of bytes the ARC should leave
as free memory on the system. This value can
checked in /proc/spl/kstat/zfs/arcstats and
setting this module option will override the
default value.
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes#3637
The zvol_threads module option should be bounded to a reasonable
range. The taskq must have at least 1 thread and shouldn't have
more than 1,024 at most. The default value of 32 is a reasonable
default.
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes#3614
Commit d958324 fixed the deadlock between page lock and range lock by
unlocking the page lock before acquiring the range lock. However,
this created a new issue #3075.
The problem is that if we can't set the write back bit before releasing
the page lock. Then other processes will be unaware that the page is
under active write back. They may therefore truncate the page,
invalidate the page, or not honor the sync semantics.
To workaround this problem we re-dirty the page before dropping the
page lock. While this doesn't prevent the page from being truncated
it does ensure it won't be invalidated. Then the range lock and the
page lock are reacquired in the correct deadlock-free order.
Once both locks are safely held the page state can be rechecked. If
all is well and the page is in the expect state the dirty bit can be
removed, the write back bit set, and the page removed from the skip
count. If not the page will be handled as appropriate.
Signed-off-by: Chunwei Chen <tuxoko@gmail.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes#3075
Under Linux filesystem threads responsible for handling I/O are
normally created with the maximum priority. Non-I/O filesystem
processes run with the default priority. ZFS should adopt the
same priority scheme under Linux to maintain good performance
and so that it will complete fairly when other Linux filesystems
are active. The priorities have been updated to the following:
$ ps -eLo rtprio,cls,pid,pri,nice,cmd | egrep 'z_|spl_|zvol|arc|dbu|meta'
- TS 10743 19 -20 [spl_kmem_cache]
- TS 10744 19 -20 [spl_system_task]
- TS 10745 19 -20 [spl_dynamic_tas]
- TS 10764 19 0 [dbu_evict]
- TS 10765 19 0 [arc_prune]
- TS 10766 19 0 [arc_reclaim]
- TS 10767 19 0 [arc_user_evicts]
- TS 10768 19 0 [l2arc_feed]
- TS 10769 39 0 [z_unmount]
- TS 10770 39 -20 [zvol]
- TS 11011 39 -20 [z_null_iss]
- TS 11012 39 -20 [z_null_int]
- TS 11013 39 -20 [z_rd_iss]
- TS 11014 39 -20 [z_rd_int_0]
- TS 11022 38 -19 [z_wr_iss]
- TS 11023 39 -20 [z_wr_iss_h]
- TS 11024 39 -20 [z_wr_int_0]
- TS 11032 39 -20 [z_wr_int_h]
- TS 11033 39 -20 [z_fr_iss_0]
- TS 11041 39 -20 [z_fr_int]
- TS 11042 39 -20 [z_cl_iss]
- TS 11043 39 -20 [z_cl_int]
- TS 11044 39 -20 [z_ioctl_iss]
- TS 11045 39 -20 [z_ioctl_int]
- TS 11046 39 -20 [metaslab_group_]
- TS 11050 19 0 [z_iput]
- TS 11121 38 -19 [z_wr_iss]
Note that under Linux the meaning of a processes priority is inverted
with respect to illumos. High values on Linux indicate a _low_ priority
while high value on illumos indicate a _high_ priority.
In order to preserve the logical meaning of the minclsyspri and
maxclsyspri macros when they are used by the illumos wrapper functions
their values have been inverted. This way when changes are merged
from upstream illumos we won't need to remember to invert the macro.
It could also lead to confusion.
This patch depends on https://github.com/zfsonlinux/spl/pull/466.
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Ned Bass <bass6@llnl.gov>
Closes#3607
A NULL should never be passed as the dnode_t pointer to the function
dmu_free_long_range_impl(). Regardless, because we have a reported
occurrence of this let's add some error handling to catch this.
Better to report a reasonable error to caller than panic the system.
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #3445
* If it's unset in find_rootfs(), no pool is imported so no point in
looking for a rootfs.
* If find_rootfs() couldn't find a rootfs, the pool is exported. Remember
to unset POOL_IMPORTED after doing so.
* Set POOL_IMPORTED if/when a pool have been imported in import_pool().
* Improve backup import (the one using cache file).
Signed-off-by: Turbo Fredriksson <turbo@bayour.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes#3636
This is some minor fixes to commits 2cac7f5f11
and 2a34db1bdb.
* Make sure to alien'ate the new initramfs rpm package as well!
The rpm package is build correctly, but alien isn't run on it to
create the deb.
* Before copying file from COPY_FILE_LIST, make sure the DESTDIR/dir exists.
* Include /lib/udev/vdev_id file in the initrd.
* Because the initrd needs to use '/sbin/modprobe' instead of 'modprobe',
we need to use this in load_module() as well.
* Make sure that load_module() can be used more globaly, instead of
calling '/sbin/modprobe' all over the place.
* Make sure that check_module_loaded() have a parameter - module to
check.
Signed-off-by: Turbo Fredriksson <turbo@bayour.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes#3626
Address minor differences in style between upstream and ZoL. This
patch contains no functional differences and is solely designed to
minimize the delta from upstream.
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #3533
Commit d962d5d didn't quite properly resolve the HDR_L2ONLY_SIZE
accounting. Accounting is now performed only in the constructor
and destructor which is a nice simplification. It should have
been removed the from create and destroy functions. This brings
up back in sync with upstream.
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #3533
Originally removed because it wasn't required under Linux. However,
there may still be some utility in signaling the arc reclaim thread
under Linux via reclaim. This should already have happened by other
means but it's not harmless and reduces another point of divergence
with upstream.
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #3533
Commit f521ce1 removed the minimum value for "arc_p" allowing it to
drop to zero or grow to "arc_c". This was done to improve specific
workload which constantly dirties new "metadata" but also frequently
touches a "small" amount of mfu data (e.g. mkdir's).
This change may still be desirable but it needs to be re-investigated.
in the context of the recent ARC changes from upstream. Therefore
this code is being restored to facilitate benchmarking. By setting
"zfs_arc_p_min_shift=64" we easily compare the performance.
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #3533
5817 change type of arcs_size from uint64_t to refcount_t
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Paul Dagnelie <paul.dagnelie@delphix.com>
Reviewed by: Adam Leventhal <ahl@delphix.com>
Reviewed by: Alex Reece <alex@delphix.com>
Reviewed by: Richard Elling <richard.elling@richardelling.com>
Approved by: Garrett D'Amore <garrett@damore.org>
References:
https://www.illumos.org/issues/5817https://github.com/illumos/illumos-gate/commit/2fd872a
Ported-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #3533
5445 Add more visibility via arcstats; specifically arc_state_t
stats and differentiate between "data" and "metadata"
Reviewed by: Basil Crow <basil.crow@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Bayard Bell <bayard.bell@nexenta.com>
Approved by: Robert Mustacchi <rm@joyent.com>
References:
https://www.illumos.org/issues/5445https://github.com/illumos/illumos-gate/commit/4076b1b
Porting Notes:
This patch is an improved version of cc7f677 which was previously
merged in ZoL. This patch incorporates the additional improvements
which were made upstream.
Ported-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #3533
5376 arc_kmem_reap_now() should not result in clearing arc_no_grow
Reviewed by: Christopher Siden <christopher.siden@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Steven Hartland <killing@multiplay.co.uk>
Reviewed by: Richard Elling <richard.elling@richardelling.com>
Approved by: Dan McDonald <danmcd@omniti.com>
References:
https://www.illumos.org/issues/5376https://github.com/illumos/illumos-gate/commit/2ec99e3
Porting Notes:
The good news is that many of the recent changes made upstream to the
ARC tackled issues previously observed by ZoL with similar solutions.
The bad news is those solution weren't identical to the ones we applied.
This patch is designed to split the difference and apply as much of the
upstream work as possible.
* The arc_available_memory() function was removed previous in ZoL but
due to the upstream changes it makes sense to add it back. This function
has been customized for Linux so that it can be used to determine a low
memory. This provides the same basic functionality as the illumos version
allowing us to minimize changes through the rest of the code base. The
exact mechanism used to detect a low memory state remains unchanged so
this change isn't a significant as it might first appear.
* This patch includes the long standing fix for arc_shrink() which was
originally proposed in #2167. Since there were related changes to this
function it made sense to include that work.
* The arc_init() function has been re-factored. As before it sets sane
default values for the ARC but then calls arc_tuning_update() to apply
user specific tuning made via module options. The arc_tuning_update()
function is then called periodically by the arc_reclaim_thread() to
apply changes to the tunings made during normal operation.
Ported-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes#3616Closes#2167
The _initconfdir macro is normally provided by global rpm macros
file for use in the spec file. However, older distributions such
as CentOS 6 do not define it. To prevent a build failure in this
case the spec file has been updated to use a reasonable default
when the value is undefined.
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes#3617
When an inode is detected with invalid mode bits the safe thing to
do is panic the system. This indicates a problem with the contents
of a dnode and it should never be possible. This is the default
behavior.
Unfortunately, due to flaws in the system attribute (SA) implementation
(on all platforms) it was possible that ZFS could create a damaged dnode.
This was a rare issue which only impacted dnodes which used a spill
block. Normally only symlinks and files with ACLs would require a
spill block. However, if the dataset had the xattr=sa property set
and extended attributes were used this problem could occur.
As of the 0.6.4 tag the root cause of this issue has been fixed. For
pools which are exhibiting this damage the 'zfs_recover=1' module option
may be set. This will cause ZFS to interpret the dnode with invalid
mode bits as a normal file. This may allow the files to be accessed
for recovery purposes.
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes#3548
Build products from an out of tree build should be written
relative to the build directory. Sources should be referred
to by their locations in the source directory.
This is accomplished by adding the 'src' and 'obj' variables
for the module Makefile.am, using relative paths to reference
source files, and by setting VPATH when source files are not
co-located with the Makefile. This enables the following:
$ mkdir build
$ cd build
$ ../configure \
--with-spl=$HOME/src/git/spl/ \
--with-spl-obj=$HOME/src/git/spl/build
$ make -s
This change also has the advantage of resolving the following
warning which is generated by modern versions of automake.
Makefile.am:00: warning: source file 'xxx' is in a subdirectory,
Makefile.am:00: but option 'subdir-objects' is disabled
Signed-off-by: Turbo Fredriksson <turbo@bayour.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes#1082
After a successful write the inode must be updated under the range
lock. If it is updated after dropping the lock there exists a race
where the znode and inode wile disagree about the file size. This
could result in narrow window of time where read(2) is able to access
data beyond what fstat(2) reports as the file size.
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Ned Bass <bass6@llnl.gov>
Closes#3601
As of Linux 4.2 the kernel has completely retired the nameidata
structure. One of the few remaining consumers of this interface
were the follow_link() and put_link() callbacks.
This patch adds the required checks to configure to detect the
interface change and updates the functions accordingly. Migrating
to the simple_follow_link() interface was considered but was decided
against ironically due to the increased complexity.
It also should be noted that the kernel follow_link() and put_link()
interfaces changes several times after 4.1 and but before 4.2. This
means there is a narrow range of kernel commits which never appear
in an official tag of the Linux kernel which ZoL will not build.
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Richard Yao <ryao@gentoo.org>
Issue #3596
Linux 4.2 commit torvalds/linux@dac5621 renamed bio->bi_cnt to
bio->__bi_cnt. Because this value is only used once in a block of
debug code it simplest just to remove the PANIC. To my knowledge
this debugging has never been hit or proved useful so this is no
great loss.
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Richard Yao <ryao@gentoo.org>
Closes#3596
The vfs_compat.h header should include the linux/backing-dev.h header
because it depends on the bdi_* functions defined there. In previous
kernels this header was being indirectly included which prevented a
build failure.
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Richard Yao <ryao@gentoo.org>
Closes#3596
Many key internal functions pass system return codes that are safe to
return to userland. In the case of ddi_copyin(9F), an error passes -1
and the documentation states very clearly that drivers should pass
EFAULT to userland when this happens.
http://illumos.org/man/9F/ddi_copyin
This does not happen in the ZFS source code. I believe it should be
changed to pass EFAULT. I caught this when writing man pages for the
libzfs_core API.
Signed-off-by: Richard Yao <ryao@gentoo.org>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes#3575
Translate zio requests with ZIO_PRIORITY_SYNC_READ and
ZIO_PRIORITY_SYNC_WRITE into synchronous bio requests by setting
READ_SYNC and WRITE_SYNC flags. Specifically, WRITE_SYNC flag turns
out to have a pronounced effect when writing to an SSD-based SLOG.
When WRITE_SYNC is not set (WRITE is set instead), the block trace
for a SLOG device looks as follows:
...
130,96 0 3 0.008968390 0 C W 830464 + 136 [0]
130,96 0 4 0.011999161 0 C W 830720 + 136 [0]
130,96 0 5 0.023955549 0 C W 831744 + 136 [0]
130,96 0 6 0.024337663 19775 A W 832000 + 136 <- (130,97) 829952
130,96 0 7 0.024338823 19775 Q W 832000 + 136 [z_wr_iss/6]
130,96 0 8 0.024340523 19775 G W 832000 + 136 [z_wr_iss/6]
130,96 0 9 0.024343187 19775 P N [z_wr_iss/6]
130,96 0 10 0.024344120 19775 I W 832000 + 136 [z_wr_iss/6]
130,96 0 11 0.026784405 0 UT N [swapper] 1
130,96 0 12 0.026805339 202 U N [kblockd/0] 1
130,96 0 13 0.026807199 202 D W 832000 + 136 [kblockd/0]
130,96 0 14 0.026966948 0 C W 832000 + 136 [0]
130,96 3 1 0.000449358 19788 A W 829952 + 136 <- (130,97) 827904
130,96 3 2 0.000450951 19788 Q W 829952 + 136 [z_wr_iss/19]
130,96 3 3 0.000453212 19788 G W 829952 + 136 [z_wr_iss/19]
130,96 3 4 0.000455956 19788 P N [z_wr_iss/19]
130,96 3 5 0.000457076 19788 I W 829952 + 136 [z_wr_iss/19]
130,96 3 6 0.002786349 0 UT N [swapper] 1
...
Here the 130,197 is the partition created on the log device when adding it
to the pool, whereas the base device is 130,96. As one can see, the writes
to the SLOG are not marked synchronous (the S is missing next to W), and
the queue unplugs occur based on the timer (UT event) resulting in slightly
over 2 msec latency of writes. This results in a sub-par performance of
single stream synchronous writes (limited by latency of the SLOG).
When the WRITE_SYNC is set, a similar trace looks as follows:
...
130,96 4 1 0.000000000 70714 A WS 4280576 + 136 <- (130,97) 4278528
130,96 4 2 0.000000832 70714 Q WS 4280576 + 136 [(null)]
130,96 4 3 0.000002109 70714 G WS 4280576 + 136 [(null)]
130,96 4 4 0.000003394 70714 P N [(null)]
130,96 4 5 0.000003846 70714 I WS 4280576 + 136 [(null)]
130,96 4 6 0.000004854 70714 D WS 4280576 + 136 [(null)]
130,96 5 1 0.000354487 70713 A WS 4280832 + 136 <- (130,97) 4278784
130,96 5 2 0.000355072 70713 Q WS 4280832 + 136 [(null)]
130,96 5 3 0.000356383 70713 G WS 4280832 + 136 [(null)]
130,96 5 4 0.000357635 70713 P N [(null)]
130,96 5 5 0.000358088 70713 I WS 4280832 + 136 [(null)]
130,96 5 6 0.000359191 70713 D WS 4280832 + 136 [(null)]
130,96 0 76 0.000159539 0 C WS 4280576 + 136 [0]
130,96 16 85 0.000742108 70718 A WS 4281088 + 136 <- (130,97) 4279040
130,96 16 86 0.000743197 70718 Q WS 4281088 + 136 [z_wr_iss/15]
130,96 16 87 0.000744450 70718 G WS 4281088 + 136 [z_wr_iss/15]
130,96 16 88 0.000745817 70718 P N [z_wr_iss/15]
130,96 16 89 0.000746705 70718 I WS 4281088 + 136 [z_wr_iss/15]
130,96 16 90 0.000747848 70718 D WS 4281088 + 136 [z_wr_iss/15]
130,96 0 77 0.000604063 0 C WS 4280832 + 136 [0]
130,96 0 78 0.000899858 0 C WS 4281088 + 136 [0]
As one can see, all the writes are synchronous (WS), and I/O completions
(e.g. from issue I to completion C) take 160-250 usec, or about 10x faster.
Since WRITE_SYNC or READ_SYNC flags are among several factors that are
considered when processing bio requests, it seems prudent to mark all the
zio requests of synchronous priority with the READ/WRITE_SYNC flags to make
them eligible for consideration as such by the Linux block I/O layer.
Signed-off-by: Boris Protopopov <boris.protopopov@actifio.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes#3529
As of gcc version 5.1.1 a new warning has been added to detect the
use of a boolean in a switch statement (-Wswitch-bool). Resolve the
warning by explicitly casting the value to an integer type.
zfs-0.6.4/module/zfs/zvol.c: In function 'zvol_request':
error: switch condition has boolean value [-Werror=switch-bool]
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
As of gcc version 5.1.1 a new boolean comparison warning has been
introduced. This warning is harmless but is triggered several places
in the ZFS code base. Because warnings are promoted to errors when
building with debugging enabled it is necessary to disable the warning
when using versions of gcc which automatically enabling this check.
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
For the purposes of creating sparse files the truncate command is
preferable to fallocate because generic sparse files are more widely
supported by older platforms. Specifically Debian Wheezy which is
based on a 2.6.32 kernel used ext3 by default which at the time did
not support it.
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
We fail to make partitions on xvd (Xen Virtual Block) devices. This also
causes debug builds of zpool create to return an error when given xen
virtual block devices. These devices should be given the same treatment
as vd (KVM Virtual Block) devices, so we adjust the relevant code paths.
Signed-off-by: Richard Yao <ryao@gentoo.org>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes#3576
5661 ZFS: "compression = on" should use lz4 if feature is enabled
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
Reviewed by: Xin LI <delphij@freebsd.org>
Approved by: Robert Mustacchi <rm@joyent.com>
References:
https://github.com/illumos/illumos-gate/commit/db1741fhttps://www.illumos.org/issues/5661
Ported-by: kernelOfTruth kerneloftruth@gmail.com
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes#3571
5118 When verifying or creating a storage pool, error messages
only show one device
Reviewed by: Adam Leventhal <adam.leventhal@delphix.com>
Reviewed by: Dan Kimmel <dan.kimmel@delphix.com>
Reviewed by: Matt Ahrens <mahrens@delphix.com>
Reviewed by: Boris Protopopov <boris.protopopov@me.com>
Approved by: Dan McDonald <danmcd@omniti.com>
References:
https://github.com/illumos/illumos-gate/commit/75fbdf9https://www.illumos.org/issues/5118
Ported-by: kernelOfTruth kerneloftruth@gmail.com
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes#3567
4966 zpool list iterator does not update output
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Christopher Siden <christopher.siden@delphix.com>
Reviewed by: Dan McDonald <danmcd@omniti.com>
Approved by: Garrett D'Amore <garrett@damore.org>
References:
https://github.com/illumos/illumos-gate/commit/cd67d23https://www.illumos.org/issues/4966
Ported-by: kernelOfTruth kerneloftruth@gmail.com
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes#3566
The dracut code is analogous to the initramfs code and as such
it should be located in the contrib with initramfs for consistency.
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
* Supports booting of a ZFS snapshot.
Do this by cloning the snapshot into a dataset. If this, the resulting
dataset, already exists, destroy it. Then mount it on root.
* If snapshot does not exist, use base dataset (the part before '@')
as boot filesystem instead.
* If no snapshot is specified on the 'root=' kernel command line, but there
is an '@', then get a list of snapshots below that filesystem and ask the
user which to use.
* Clone with 'mountpoint=none' and 'canmount=noauto' - we mount manually
and explicitly.
* For sub-filesystems, that doesn't have a mountpoint property set, we use
the 'org.zol:mountpoint' to keep track of it's mountpoint.
* Allow rollback of snapshots instead of clone it and boot from the clone.
* Allow mounting a root- and subfs with mountpoint=legacy set
* Allow mounting a filesystem which is using nativ encryption.
* Support all currently used kernel command line arguments
All the different distributions have their own standard on what to specify
on the kernel command line to boot of a ZFS filesystem.
* Extra options:
* zfsdebug=(on,yes,1) Show extra debugging information
* zfsforce=(on,yes,1) Force import the pool
* rollback=(on,yes,1) Rollback (instead of clone) the snapshot
* Only try to import pool if it haven't already been imported
* This will negate the need to force import a pool that have not been exported cleanly.
* Support exclusion of pools to import by setting ZFS_POOL_EXCEPTIONS in /etc/default/zfs.
* Support additional configuration variable ZFS_INITRD_ADDITIONAL_DATASETS
to mount additional filesystems not located under your root dataset.
* Include /etc/modprobe.d/{zfs,spl}.conf in the initrd if it/they exist.
* Include the udev rule to use by-vdev for pool imports.
* Include the /etc/default/zfs file to the initrd.
* Only try /dev/disk/by-* in the initrd if USE_DISK_BY_ID is set.
* Use /dev/disk/by-vdev before anything.
* Add /dev as a last ditch attempt.
* Fallback to using the cache file if that exist if nothing else worked.
* Use /sbin/modprobe instead of built-in (BusyBox) modprobe.
This gets rid of the message "modprobe: can't load module zcommon".
Thanx to pcoultha for finding this.
Signed-off-by: Turbo Fredriksson <turbo@bayour.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes#2116Closes#2114
Reclaim during metaslab preloading can cause deadlocks involving znode
z_lock and ARC buffer header ht_lock.
Signed-off-by: Tim Chase <tim@chase2k.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes#3532.
5008 lock contention (rrw_exit) while running a read only load
Reviewed by: Matthew Ahrens <matthew.ahrens@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Alex Reece <alex.reece@delphix.com>
Reviewed by: Christopher Siden <christopher.siden@delphix.com>
Reviewed by: Richard Yao <ryao@gentoo.org>
Reviewed by: Saso Kiselkov <skiselkov.ml@gmail.com>
Approved by: Garrett D'Amore <garrett@damore.org>
Porting notes:
This patch ported perfectly cleanly to ZoL. During testing 100% cached
small-block reads, extreme contention was noticed on rrl->rr_lock from
rrw_exit() due to the frequent entering and leaving ZPL. Illumos picked
up this patch from FreeBSD and it also helps under Linux.
On a 1-minute 4K cached read test with 10 fio processes pinned to a single
socket on a 4-socket (10 thread per socket) NUMA system, contentions on
rrl->rr_lock were reduced from 508799 to 43085.
Ported-by: Tim Chase <tim@chase2k.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes#3555
5946 zfs_ioc_space_snaps must check that firstsnap and lastsnap refer to snapshots
5945 zfs_ioc_send_space must ensure that fromsnap refers to a snapshot
Reviewed by: Steven Hartland <killing@multiplay.co.uk>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Approved by: Gordon Ross <gordon.ross@nexenta.com>
References:
https://www.illumos.org/issues/5946https://www.illumos.org/issues/5945https://github.com/illumos/illumos-gate/commit/24218be
Ported-by: Andriy Gapon <avg@FreeBSD.org>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes#3552
