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aoe: allow user to disable target failure timeout

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With this change, the aoe driver treats the value zero as special for
the aoe_deadsecs module parameter.  Normally, this value specifies the
number of seconds during which the driver will continue to attempt
retransmits to an unresponsive AoE target.  After aoe_deadsecs has
elapsed, the aoe driver marks the aoe device as "down" and fails all
I/O.

The new meaning of an aoe_deadsecs of zero is for the driver to
retransmit commands indefinitely.

Signed-off-by: Ed Cashin <[email protected]>
Cc: Jens Axboe <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Ed Cashin 2012-12-17 16:04:14 -08:00 • committed by Linus Torvalds
commit c450ba0fc1
2 changed files with 6 additions and 2 deletions
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4
Documentation/aoe/aoe.txt
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@ -125,7 +125,9 @@ DRIVER OPTIONS
The aoe_deadsecs module parameter determines the maximum number of
seconds that the driver will wait for an AoE device to provide a
response to an AoE command. After aoe_deadsecs seconds have
elapsed, the AoE device will be marked as "down".
elapsed, the AoE device will be marked as "down". A value of zero
is supported for testing purposes and makes the aoe driver keep
trying AoE commands forever.
The aoe_maxout module parameter has a default of 128. This is the
maximum number of unresponded packets that will be sent to an AoE