Do you have sata Native Command Queuing enabled? I've experienced delays of
just under one minute when NCQ is enabled, that do not occur when NCQ is
disabled. If all threads comprising the parallel zfs destroy hang for a
minute, I bet its the hang that causes "no more processes". I have opened a
trouble ticket on this issue, and am waiting for feedback. In the mean time,
I've disabled NCQ by adding the line below to /etc/system (and rebooting).
set sata:sata_func_enable = 0x5
While this probably incurs some preformance penalty, its better than the one
minute hangs.
The following is a typical log entry that appears at the conclusion of a one
minute period
"stall".
Oct 21 07:56:09 host marvell88sx: [ID 670675 kern.info] NOTICE: marvell88sx1:
device on port 0 reset: DMA command timeout
Oct 21 07:56:09 host sata: [ID 801593 kern.notice] NOTICE: /[EMAIL
PROTECTED],0/pci1022,[EMAIL PROTECTED]/pci11ab,[EMAIL PROTECTED]:
Oct 21 07:56:09 host port 0: device reset
Oct 21 07:56:09 host marvell88sx: [ID 670675 kern.info] NOTICE: marvell88sx1:
device on port 0 reset: device disconnected or
device error
Oct 21 07:56:09 host sata: [ID 801593 kern.notice] NOTICE: /[EMAIL
PROTECTED],0/pci1022,[EMAIL PROTECTED]/pci11ab,[EMAIL PROTECTED]:
Oct 21 07:56:09 host port 0: device reset
Oct 21 07:56:09 host sata: [ID 801593 kern.notice] NOTICE: /[EMAIL
PROTECTED],0/pci1022,[EMAIL PROTECTED]/pci11ab,[EMAIL PROTECTED]:
Oct 21 07:56:09 host port 0: link lost
Oct 21 07:56:09 host sata: [ID 801593 kern.notice] NOTICE: /[EMAIL
PROTECTED],0/pci1022,[EMAIL PROTECTED]/pci11ab,[EMAIL PROTECTED]:
Oct 21 07:56:09 host port 0: link established
Oct 21 07:56:09 host marvell88sx: [ID 812950 kern.warning] WARNING:
marvell88sx1: error on port 0:
Oct 21 07:56:09 host marvell88sx: [ID 517869 kern.info] device
disconnected
Oct 21 07:56:09 host marvell88sx: [ID 517869 kern.info] device connected
Oct 21 07:56:09 host scsi: [ID 107833 kern.warning] WARNING: /[EMAIL
PROTECTED],0/pci1022,[EMAIL PROTECTED]/pci11ab,[EMAIL PROTECTED]/[EMAIL
PROTECTED],0 (sd6):
Oct 21 07:56:09 host Error for Command: write(10) Error Level:
Retryable
Oct 21 07:56:09 host scsi: [ID 107833 kern.notice] Requested Block:
376060962 Error Block: 376060962
Oct 21 07:56:09 host scsi: [ID 107833 kern.notice] Vendor: ATA
Serial Number:
Oct 21 07:56:09 host scsi: [ID 107833 kern.notice] Sense Key: No Additional
Sense
Oct 21 07:56:09 host scsi: [ID 107833 kern.notice] ASC: 0x0 (no additional
sense info), ASCQ: 0x0, FRU: 0x0d
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