Andriy Gapon f94aa61c33 MFV r323917: 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 This means the ASSERTion we make in dbuf_unoverride() is no longer valid because now dmu_sync() is called from zilog's get_data functions holding a partial lock on the dbuf.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> MFC after: 10 days		2017-09-22 08:27:27 +00:00
..
boot/zfs	loader should support large_dnode	2017-09-12 13:45:04 +00:00
compat/opensolaris	dounmount: do not release the mount point's reference on the covered vnode	2017-09-14 08:47:06 +00:00
contrib/opensolaris	MFV r323917: 8648 Fix range locking in ZIL commit codepath	2017-09-22 08:27:27 +00:00
dev	Enable dtrace support for mips64 and the ERL kernel config	2017-09-06 03:19:52 +00:00