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| author | Ed Cashin <ecashin@coraid.com> | 2012-12-17 16:04:14 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-12-17 17:15:25 -0800 |
| commit | c450ba0fc12153cb5d3fd582b4ec82c75217a989 (patch) | |
| tree | 2acf7807aed922a2bb444b8b4f67d40961372331 | |
| parent | 71114ec45f09eb6ef6f9d41c98d4ab6455086e58 (diff) | |
| download | linux-stable-c450ba0fc12153cb5d3fd582b4ec82c75217a989.tar.gz linux-stable-c450ba0fc12153cb5d3fd582b4ec82c75217a989.tar.bz2 linux-stable-c450ba0fc12153cb5d3fd582b4ec82c75217a989.zip | |
aoe: allow user to disable target failure timeout
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 <ecashin@coraid.com>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | Documentation/aoe/aoe.txt | 4 | ||||
| -rw-r--r-- | drivers/block/aoe/aoecmd.c | 4 |
2 files changed, 6 insertions, 2 deletions
diff --git a/Documentation/aoe/aoe.txt b/Documentation/aoe/aoe.txt index bfc9cb19abcd..c71487d399d1 100644 --- a/Documentation/aoe/aoe.txt +++ b/Documentation/aoe/aoe.txt @@ -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 diff --git a/drivers/block/aoe/aoecmd.c b/drivers/block/aoe/aoecmd.c index da360f95c8ea..abf4ad2d3e18 100644 --- a/drivers/block/aoe/aoecmd.c +++ b/drivers/block/aoe/aoecmd.c @@ -812,7 +812,9 @@ rexmit_timer(ulong vp) since = tsince_hr(f); n = f->waited_total + since; n /= USEC_PER_SEC; - if (n > aoe_deadsecs && !(f->flags & FFL_PROBE)) { + if (aoe_deadsecs + && n > aoe_deadsecs + && !(f->flags & FFL_PROBE)) { /* Waited too long. Device failure. * Hang all frames on first hash bucket for downdev * to clean up. |