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Add missing module_param for zfs_per_txg_dirty_frees_percent

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When the code was added this tunable was not exposed via module params. Also it
was not documented. This patch changes the type from a uint32 to a ulong as
done with other percentage tunables and also documents it in the
zfs-module-parameters man page.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: David Quigley <david.quigley@intel.com>
Closes #5750
This commit is contained in:
David Quigley 2017-02-07 10:44:03 -07:00 committed by Brian Behlendorf
parent cd5083c00c
commit bef78122e6
2 changed files with 22 additions and 1 deletions
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16
man/man5/zfs-module-parameters.5
View File

@ -1438,6 +1438,22 @@ The number of bytes which should be prefetched during a pool traversal
Default value: \fB52,428,800\fR.
.RE
.sp
.ne 2
.na
\fBzfs_per_txg_dirty_frees_percent \fR (ulong)
.ad
.RS 12n
Tunable to control percentage of dirtied blocks from frees in one TXG.
After this threshold is crossed, additional dirty blocks from frees
wait until the next TXG.
A value of zero will disable this throttle.
.sp
Default value: \fB30\fR and \fB0\fR to disable.
.RE
.sp
.ne 2
.na

7
module/zfs/dmu.c
View File

@ -65,7 +65,7 @@ int zfs_nopwrite_enabled = 1;
* wait until the next TXG.
* A value of zero will disable this throttle.
*/
uint32_t zfs_per_txg_dirty_frees_percent = 30;
unsigned long zfs_per_txg_dirty_frees_percent = 30;
const dmu_object_type_info_t dmu_ot[DMU_OT_NUMTYPES] = {
{ DMU_BSWAP_UINT8, TRUE, "unallocated" },
@ -2228,10 +2228,15 @@ EXPORT_SYMBOL(dmu_assign_arcbuf);
EXPORT_SYMBOL(dmu_buf_hold);
EXPORT_SYMBOL(dmu_ot);
/* BEGIN CSTYLED */
module_param(zfs_mdcomp_disable, int, 0644);
MODULE_PARM_DESC(zfs_mdcomp_disable, "Disable meta data compression");
module_param(zfs_nopwrite_enabled, int, 0644);
MODULE_PARM_DESC(zfs_nopwrite_enabled, "Enable NOP writes");
module_param(zfs_per_txg_dirty_frees_percent, ulong, 0644);
MODULE_PARM_DESC(zfs_per_txg_dirty_frees_percent,
"percentage of dirtied blocks from frees in one TXG");
/* END CSTYLED */
#endif