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The Call For Testing had no reports of operational problems and

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found that performance was no worse and usually better when running
with TRIM consolidation. Performance improvement was most noticable
when multiple large files are released in a short period of time.

Thus, TRIM consolidation is being enabled by default. Should
operational problems be found, it can be disabled using the command
`sysctl vfs.ffs.dotrimcons=0'. This variable can also be set as a
tunable if early disabling is necessary.

Approved by:  re (gjb)
Sponsored by: Netflix
This commit is contained in:
mckusick 2018-09-06 23:28:35 +00:00
parent 20a0068401
commit a81473809a
1 changed files with 2 additions and 2 deletions
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4
sys/ufs/ffs/ffs_alloc.c
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@ -484,8 +484,8 @@ static int doreallocblks = 1;
SYSCTL_INT(_vfs_ffs, OID_AUTO, doreallocblks, CTLFLAG_RW, &doreallocblks, 0,
"enable block reallocation");
static int dotrimcons = 0;
SYSCTL_INT(_vfs_ffs, OID_AUTO, dotrimcons, CTLFLAG_RW, &dotrimcons, 0,
static int dotrimcons = 1;
SYSCTL_INT(_vfs_ffs, OID_AUTO, dotrimcons, CTLFLAG_RWTUN, &dotrimcons, 0,
"enable BIO_DELETE / TRIM consolidation");
static int maxclustersearch = 10;