linux_dsm_epyc7002/drivers/scsi/libsas
Jason Yan f12486e06a scsi: libsas: shut down the PHY if events reached the threshold
If the PHY burst too many events, we will alloc a lot of events for the
worker. This may leads to memory exhaustion.

Dan Williams suggested to shut down the PHY if the events reached the
threshold, because in this case the PHY may have gone into some
erroneous state. Users can re-enable the PHY by sysfs if they want.

We cannot use the fixed memory pool because if we run out of events, the
shut down event and loss of signal event will lost too. The events still
need to be allocated and processed in this case.

Suggested-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Jason Yan <yanaijie@huawei.com>
CC: John Garry <john.garry@huawei.com>
CC: Johannes Thumshirn <jthumshirn@suse.de>
CC: Ewan Milne <emilne@redhat.com>
CC: Christoph Hellwig <hch@lst.de>
CC: Tomas Henzl <thenzl@redhat.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2018-01-08 21:59:28 -05:00
..
Kconfig scsi: scsi_transport_sas: switch to bsg-lib for SMP passthrough 2017-08-29 21:51:45 -04:00
Makefile Merge branch 'trivial' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6 2011-03-20 18:14:55 -07:00
sas_ata.c scsi: libsas: Annotate fall-through in a switch statement 2017-08-25 17:08:08 -04:00
sas_discover.c libsas: Fix Kernel Crash in smp_execute_task 2015-03-06 20:51:29 -08:00
sas_dump.c scsi: libsas: kill useless ha_event and do some cleanup 2017-09-15 21:32:58 -04:00
sas_dump.h scsi: libsas: kill useless ha_event and do some cleanup 2017-09-15 21:32:58 -04:00
sas_event.c scsi: libsas: Use dynamic alloced work to avoid sas event lost 2018-01-08 21:59:28 -05:00
sas_expander.c scsi: libsas: initialize sas_phy status according to response of DISCOVER 2018-01-08 21:43:05 -05:00
sas_host_smp.c scsi: scsi_transport_sas: switch to bsg-lib for SMP passthrough 2017-08-29 21:51:45 -04:00
sas_init.c scsi: libsas: shut down the PHY if events reached the threshold 2018-01-08 21:59:28 -05:00
sas_internal.h scsi: libsas: Use dynamic alloced work to avoid sas event lost 2018-01-08 21:59:28 -05:00
sas_phy.c scsi: libsas: shut down the PHY if events reached the threshold 2018-01-08 21:59:28 -05:00
sas_port.c scsi: libsas: Use dynamic alloced work to avoid sas event lost 2018-01-08 21:59:28 -05:00
sas_scsi_host.c scsi: libsas: remove private hex2bin() implementation 2018-01-03 22:40:52 -05:00
sas_task.c scsi: Add export.h for EXPORT_SYMBOL/THIS_MODULE as required 2011-10-31 19:31:23 -04:00