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| author | Quinn Tran <qutran@marvell.com> | 2020-09-04 06:51:26 +0200 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2020-09-23 00:42:49 +0200 |
| commit | 89c72f4245a8510ffdb0d1980944210b8bc6e49f (patch) | |
| tree | b81139c7985687e4aa13cba9d4e81114e61a97ab /Documentation/dev-tools/kgdb.rst | |
| parent | scsi: qla2xxx: Add rport fields in debugfs (diff) | |
| download | linux-89c72f4245a8510ffdb0d1980944210b8bc6e49f.tar.xz linux-89c72f4245a8510ffdb0d1980944210b8bc6e49f.zip | |
scsi: qla2xxx: Add IOCB resource tracking
This patch tracks number of IOCB resources used in the I/O fast path. If
the number of used IOCBs reach a high water limit, driver would return the
I/O as busy and let upper layer retry. This prevents over subscription of
IOCB resources where any future error recovery command is unable to cut
through. Enable IOCB throttling by default.
Link: https://lore.kernel.org/r/20200904045128.23631-12-njavali@marvell.com
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Quinn Tran <qutran@marvell.com>
Signed-off-by: Arun Easi <aeasi@marvell.com>
Signed-off-by: Nilesh Javali <njavali@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'Documentation/dev-tools/kgdb.rst')
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