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author | Damien Le Moal <damien.lemoal@wdc.com> | 2018-11-20 10:52:35 +0900 |
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committer | Jens Axboe <axboe@kernel.dk> | 2018-11-19 19:03:46 -0700 |
commit | 64845a1ddd655574886eb48e9a5eaeeb9b05bf0d (patch) | |
tree | 25bc608fd44a569c9fefd6d89a13de734193555e /include/linux/ioprio.h | |
parent | e2b3fa5af70c1e646270f6c7c799414f5e904d7a (diff) | |
download | linux-64845a1ddd655574886eb48e9a5eaeeb9b05bf0d.tar.gz linux-64845a1ddd655574886eb48e9a5eaeeb9b05bf0d.tar.bz2 linux-64845a1ddd655574886eb48e9a5eaeeb9b05bf0d.zip |
block: Introduce get_current_ioprio()
Define get_current_ioprio() as an inline helper to obtain the caller
I/O priority from its task I/O context. Use this helper in
blk_init_request_from_bio() to set a request ioprio.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/linux/ioprio.h')
-rw-r--r-- | include/linux/ioprio.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/linux/ioprio.h b/include/linux/ioprio.h index 9e30ed6443db..e9bfe6972aed 100644 --- a/include/linux/ioprio.h +++ b/include/linux/ioprio.h @@ -71,6 +71,19 @@ static inline int task_nice_ioclass(struct task_struct *task) } /* + * If the calling process has set an I/O priority, use that. Otherwise, return + * the default I/O priority. + */ +static inline int get_current_ioprio(void) +{ + struct io_context *ioc = current->io_context; + + if (ioc) + return ioc->ioprio; + return IOPRIO_PRIO_VALUE(IOPRIO_CLASS_NONE, 0); +} + +/* * For inheritance, return the highest of the two given priorities */ extern int ioprio_best(unsigned short aprio, unsigned short bprio); |