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Andriy Gapon 23cfd1c3cf 8648 Fix range locking in ZIL commit codepath 
illumos/illumos-gate@42b1411172
42b1411172

https://www.illumos.org/issues/8648
  I'm opening this bug to track integration of the following ZFS on Linux
  commit into illumos:

  commit f763c3d1df
  Author: LOLi <loli10K@users.noreply.github.com>
  Date:   Mon Aug 21 17:59:48 2017 +0200

      Fix range locking in ZIL commit codepath

      Since OpenZFS 7578 (1b7c1e5) if we have a ZVOL with logbias=throughput
      we will force WR_INDIRECT itxs in zvol_log_write() setting itx->itx_lr
      offset and length to the offset and length of the BIO from
      zvol_write()->zvol_log_write(): these offset and length are later used
      to take a range lock in zillog->zl_get_data function: zvol_get_data().

      Now suppose we have a ZVOL with blocksize=8K and push 4K writes to
      offset 0: we will only be range-locking 0-4096. This means the
      ASSERTion we make in dbuf_unoverride() is no longer valid because now
      dmu_sync() is called from zilog's get_data functions holding a partial
      lock on the dbuf.

      Fix this by taking a range lock on the whole block in zvol_get_data().

      Reviewed-by: Chunwei Chen <tuxoko@gmail.com>
      Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
      Signed-off-by: loli10K <ezomori.nozomu@gmail.com>

Reviewed by: Igor Kozhukhov <igor@dilos.org>
Reviewed by: Matt Ahrens <mahrens@delphix.com>
Reviewed by: Andriy Gapon <avg@FreeBSD.org>
Reviewed by: Alexander Motin <mav@FreeBSD.org>
Approved by: Robert Mustacchi <rm@joyent.com>
Author: LOLi <loli10K@users.noreply.github.com>
2017-09-22 08:23:24 +00:00
cmd 8567 Inconsistent return value in zpool_read_label 2017-09-20 07:18:09 +00:00
common 7431 ZFS Channel Programs 2017-09-13 10:45:49 +00:00
head 5066 remove support for non-ANSI compilation 2014-08-20 06:29:42 +00:00
lib 8600 ZFS channel programs - snapshot 2017-09-22 08:18:05 +00:00
man 8600 ZFS channel programs - snapshot 2017-09-22 08:18:05 +00:00
tools/ctf 5589 improper use of NULL in tools/ctf 2015-03-09 20:43:14 +00:00
uts 8648 Fix range locking in ZIL commit codepath 2017-09-22 08:23:24 +00:00
OPENSOLARIS.LICENSE Update vendor/opensolaris to last OpenSolaris state (13149:b23a4dab3d50) 2012-07-18 07:48:04 +00:00