diff options
| author | Ming Lei <ming.lei@redhat.com> | 2020-05-14 16:45:09 +0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2020-05-14 08:06:04 -0600 |
| commit | 71ac860af824ce9ebbbe8de20044e777c0fc33b9 (patch) | |
| tree | a060314e64f575390ed43d4009778bc6ce27826d /block | |
| parent | 02ef12a663c7ac24b06146d0ed3137848edb0676 (diff) | |
block: move blk_io_schedule() out of header file
blk_io_schedule() isn't called from performance sensitive code path, and
it is easier to maintain by exporting it as symbol.
Also blk_io_schedule() is only called by CONFIG_BLOCK code, so it is safe
to do this way. Meantime fixes build failure when CONFIG_BLOCK is off.
Cc: Christoph Hellwig <hch@infradead.org>
Fixes: e6249cdd46e4 ("block: add blk_io_schedule() for avoiding task hung in sync dio")
Reported-by: Satya Tangirala <satyat@google.com>
Tested-by: Satya Tangirala <satyat@google.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block')
| -rw-r--r-- | block/blk-core.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/block/blk-core.c b/block/blk-core.c index cf5b2163edfe..7c1587b45427 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -38,6 +38,7 @@ #include <linux/debugfs.h> #include <linux/bpf.h> #include <linux/psi.h> +#include <linux/sched/sysctl.h> #define CREATE_TRACE_POINTS #include <trace/events/block.h> @@ -1812,6 +1813,18 @@ void blk_finish_plug(struct blk_plug *plug) } EXPORT_SYMBOL(blk_finish_plug); +void blk_io_schedule(void) +{ + /* Prevent hang_check timer from firing at us during very long I/O */ + unsigned long timeout = sysctl_hung_task_timeout_secs * HZ / 2; + + if (timeout) + io_schedule_timeout(timeout); + else + io_schedule(); +} +EXPORT_SYMBOL_GPL(blk_io_schedule); + int __init blk_dev_init(void) { BUILD_BUG_ON(REQ_OP_LAST >= (1 << REQ_OP_BITS)); |