diff options
| author | Matthew Macy <[email protected]> | 2020-12-09 15:05:06 -0800 |
|---|---|---|
| committer | GitHub <[email protected]> | 2020-12-09 15:05:06 -0800 |
| commit | 1e4732cbda8eb0c95901ed9f924b5a13bf24c76e (patch) | |
| tree | 0a480e1fce09aaa2fe99a60575757e7da8409fe5 /include/sys/arc.h | |
| parent | edb20ff3bab31f9e07578a7bf8279d67b821f29a (diff) | |
Decouple arc_read_done callback from arc buf instantiation
Add ARC_FLAG_NO_BUF to indicate that a buffer need not be
instantiated. This fixes a ~20% performance regression on
cached reads due to zfetch changes.
Reviewed-by: Tony Nguyen <[email protected]>
Reviewed-by: Brian Behlendorf <[email protected]>
Reviewed-by: Matthew Ahrens <[email protected]>
Signed-off-by: Matt Macy <[email protected]>
Closes #11220
Closes #11232
Diffstat (limited to 'include/sys/arc.h')
| -rw-r--r-- | include/sys/arc.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/sys/arc.h b/include/sys/arc.h index a0852b4d5..9ade1a432 100644 --- a/include/sys/arc.h +++ b/include/sys/arc.h @@ -155,6 +155,11 @@ typedef enum arc_flags ARC_FLAG_CACHED_ONLY = 1 << 22, /* + * Don't instantiate an arc_buf_t for arc_read_done. + */ + ARC_FLAG_NO_BUF = 1 << 23, + + /* * The arc buffer's compression mode is stored in the top 7 bits of the * flags field, so these dummy flags are included so that MDB can * interpret the enum properly. |