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Change os->os_next_write_raw to work per txg

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Currently, os_next_write_raw is a single boolean used for determining
whether or not the next call to dmu_objset_sync() should write out
the objset_phys_t as a raw buffer. Since the boolean is not associated
with a txg, the work simply happens during the next txg, which is not
necessarily the correct one. In the current implementation this issue
was misdiagnosed, resulting in a small hack in dmu_objset_sync() which
seemed to resolve the problem.

This patch changes os_next_write_raw to be an array of booleans, one
for each txg in TXG_OFF and removes the hack.

Reviewed-by: Jorgen Lundman <lundman@lundman.net>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Signed-off-by: Tom Caputi <tcaputi@datto.com>
Closes #6864
This commit is contained in:
Tom Caputi
2018-02-01 15:37:24 -05:00
committed by Brian Behlendorf
parent 047116ac76
commit 1b66810bad
6 changed files with 8 additions and 7 deletions
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module/zfs/dsl_dataset.c
+1 -1
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@@ -941,7 +941,7 @@ dsl_dataset_zero_zil(dsl_dataset_t *ds, dmu_tx_t *tx)
bzero(&os->os_zil_header, sizeof (os->os_zil_header));
if (os->os_encrypted)
os->os_next_write_raw = B_TRUE;
os->os_next_write_raw[tx->tx_txg & TXG_MASK] = B_TRUE;
zio = zio_root(dp->dp_spa, NULL, NULL, ZIO_FLAG_MUSTSUCCEED);
dsl_dataset_sync(ds, zio, tx);