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authorMing Lei <ming.lei@redhat.com>2017-04-15 20:38:23 +0800
committerJens Axboe <axboe@fb.com>2017-04-19 14:15:45 -0600
commit4981d04dd8f1ab19e2cce008da556d7f099b6e68 (patch)
tree79b9fd949a54ae4ed3247dddf4d9b2b83076dc6e
parent3a5088c8c11ac9d56f7e90acaaae9e0e98c1ff94 (diff)
mtip32xx: pass BLK_MQ_F_NO_SCHED
The recent introduced MQ IO scheduler breaks mtip32xx in the following way. mtip32xx use the 'request_index' passed to .init_request() as hardware tag index for initializing hardware queue, and it actually require that rq->tag is always same with 'request_index' passed to .init_request(). Current blk-mq IO scheduler can't guarantee this point, so this patch passes BLK_MQ_F_NO_SCHED and at least make mtip32xx working. This patch fixes the following strange hardware failure. The issue can be triggered easily when doing I/O with mq-deadline enabled. [ 186.972578] {1}[Hardware Error]: Hardware error from APEI Generic Hardware Error Source: 32993 [ 186.972578] {1}[Hardware Error]: event severity: fatal [ 186.972579] {1}[Hardware Error]: Error 0, type: fatal [ 186.972580] {1}[Hardware Error]: section_type: PCIe error [ 186.972580] {1}[Hardware Error]: port_type: 0, PCIe end point [ 186.972581] {1}[Hardware Error]: version: 1.0 [ 186.972581] {1}[Hardware Error]: command: 0x0407, status: 0x0010 [ 186.972582] {1}[Hardware Error]: device_id: 0000:07:00.0 [ 186.972582] {1}[Hardware Error]: slot: 4 [ 186.972583] {1}[Hardware Error]: secondary_bus: 0x00 [ 186.972583] {1}[Hardware Error]: vendor_id: 0x1344, device_id: 0x5150 [ 186.972584] {1}[Hardware Error]: class_code: 008001 [ 186.972585] Kernel panic - not syncing: Fatal hardware error! Reported-by: Jozef Mikovic <jmikovic@redhat.com> Signed-off-by: Ming Lei <ming.lei@redhat.com> Signed-off-by: Jens Axboe <axboe@fb.com>
-rw-r--r--drivers/block/mtip32xx/mtip32xx.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/block/mtip32xx/mtip32xx.c b/drivers/block/mtip32xx/mtip32xx.c
index f96ab717534c..1d1dc11aa5fa 100644
--- a/drivers/block/mtip32xx/mtip32xx.c
+++ b/drivers/block/mtip32xx/mtip32xx.c
@@ -3969,7 +3969,7 @@ static int mtip_block_initialize(struct driver_data *dd)
dd->tags.reserved_tags = 1;
dd->tags.cmd_size = sizeof(struct mtip_cmd);
dd->tags.numa_node = dd->numa_node;
- dd->tags.flags = BLK_MQ_F_SHOULD_MERGE;
+ dd->tags.flags = BLK_MQ_F_SHOULD_MERGE | BLK_MQ_F_NO_SCHED;
dd->tags.driver_data = dd;
dd->tags.timeout = MTIP_NCQ_CMD_TIMEOUT_MS;