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Brian Behlendorf f90a30ad1b
Fix txg_sync_thread hang in scan_exec_io() 
When scn->scn_maxinflight_bytes has not been initialized it's
possible to hang on the condition variable in scan_exec_io().
This issue was uncovered by ztest and is only possible when
deduplication is enabled through the following call path.

  txg_sync_thread()
    spa_sync()
      ddt_sync_table()
        ddt_sync_entry()
          dsl_scan_ddt_entry()
            dsl_scan_scrub_cb()
              dsl_scan_enqueuei()
                scan_exec_io()
                  cv_wait()

Resolve the issue by always initializing scn_maxinflight_bytes
to a reasonable minimum value.  This value will be recalculated
in dsl_scan_sync() to pick up changes to zfs_scan_vdev_limit
and the addition/removal of vdevs.

Reviewed-by: Tom Caputi <tcaputi@datto.com>
Reviewed by: George Melikov <mail@gmelikov.ru>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #7098
2018-01-31 09:33:33 -08:00
.github Reduce codecov PR comments 2018-01-09 11:15:55 -08:00
cmd Fix style issues in man pages and commands help 2018-01-29 15:05:03 -08:00
config Fix Debian packaging on ARMv7/ARM64 2018-01-18 10:15:41 -08:00
contrib Update README.initramfs.markdown 2018-01-26 09:55:16 -08:00
etc remove pools without a bootfs from BOOTFS variable 2018-01-30 15:58:19 -08:00
include OpenZFS 8997 - ztest assertion failure in zil_lwb_write_issue 2018-01-26 20:19:46 -08:00
lib Fix 'zfs receive -o' when used with '-e|-d' 2018-01-30 15:54:33 -08:00
man Fix zpool-features(5) large_block inconsistency 2018-01-29 15:10:32 -08:00
module Fix txg_sync_thread hang in scan_exec_io() 2018-01-31 09:33:33 -08:00
rpm Force ztest to always use /dev/urandom 2018-01-12 09:36:26 -08:00
scripts Extend zloop.sh for automated testing 2018-01-25 13:42:34 -08:00
tests Fix 'zfs receive -o' when used with '-e|-d' 2018-01-30 15:54:33 -08:00
udev Fix spelling 2017-01-03 11:31:18 -06:00
.gitignore Add configure option to enable gcov analysis 2017-09-15 10:24:13 -07:00
.gitmodules Add zimport.sh compatibility test script 2014-02-21 12:10:31 -08:00
.travis.yml Add .travis.yml 2017-11-13 09:18:18 -08:00
AUTHORS Add a missing > to AUTHORS 2014-09-02 14:18:53 -07:00
autogen.sh build: do not call boilerplate ourself 2013-04-02 10:55:20 -07:00
configure.ac Add dbuf hash and dbuf cache kstats 2018-01-29 10:24:52 -08:00
copy-builtin Fix copy-builtin to work with ASAN patch 2018-01-12 09:39:36 -08:00
COPYRIGHT Encryption patch follow-up 2017-10-11 16:54:48 -04:00
DISCLAIMER Fix minor typos and update marketing copy. 2013-03-21 12:51:06 -07:00
Makefile.am Update for cppcheck v1.80 2017-11-18 14:08:00 -08:00
META Tag zfs-0.7.0 2017-07-26 10:13:25 -07:00
OPENSOLARIS.LICENSE Add CDDL license file 2008-12-01 14:49:34 -08:00
README.markdown Add scan.coverity.com badge to README 2017-10-30 16:21:24 -07:00
TEST Refresh TEST file to include new variables 2017-11-08 11:09:30 -08:00
zfs.release.in Move zfs.release generation to configure step 2012-07-12 12:22:51 -07:00

README.markdown

img

ZFS on Linux is an advanced file system and volume manager which was originally developed for Solaris and is now maintained by the OpenZFS community.

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Official Resources

Installation

Full documentation for installing ZoL on your favorite Linux distribution can be found at our site.

Contribute & Develop

We have a separate document with contribution guidelines.