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| author | Christoph Hellwig <hch@lst.de> | 2018-12-13 16:17:02 +0100 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2018-12-19 05:13:12 +0100 |
| commit | 2a3d4eb8e228061c09d5ca8bf39e7f00c2091213 (patch) | |
| tree | 867ce9fbb2ecee876580bb728ef3affb3e1b41d3 /drivers/scsi/advansys.c | |
| parent | scsi: make sure all drivers set the use_clustering flag (diff) | |
| download | linux-2a3d4eb8e228061c09d5ca8bf39e7f00c2091213.tar.xz linux-2a3d4eb8e228061c09d5ca8bf39e7f00c2091213.zip | |
scsi: flip the default on use_clustering
Most SCSI drivers want to enable "clustering", that is merging of
segments so that they might span more than a single page. Remove the
ENABLE_CLUSTERING define, and require drivers to explicitly set
DISABLE_CLUSTERING to disable this feature.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/advansys.c')
| -rw-r--r-- | drivers/scsi/advansys.c | 8 |
1 files changed, 0 insertions, 8 deletions
diff --git a/drivers/scsi/advansys.c b/drivers/scsi/advansys.c index 223ef6f4e258..95b4793c33f4 100644 --- a/drivers/scsi/advansys.c +++ b/drivers/scsi/advansys.c @@ -10808,14 +10808,6 @@ static struct scsi_host_template advansys_template = { * for non-ISA adapters. */ .unchecked_isa_dma = true, - /* - * All adapters controlled by this driver are capable of large - * scatter-gather lists. According to the mid-level SCSI documentation - * this obviates any performance gain provided by setting - * 'use_clustering'. But empirically while CPU utilization is increased - * by enabling clustering, I/O throughput increases as well. - */ - .use_clustering = ENABLE_CLUSTERING, }; static int advansys_wide_init_chip(struct Scsi_Host *shost) |