| Message ID | 20210203112107.18279-1-nanich.lee@samsung.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | None | expand |
On Wed, Feb 03, 2021 at 08:21:07PM +0900, Changheun Lee wrote: > Add limit_bio_size block sysfs node to limit bio size. > Queue flag QUEUE_FLAG_LIMIT_BIO_SIZE will be set if limit_bio_size is set. > And bio max size will be limited by queue max sectors via > QUEUE_FLAG_LIMIT_BIO_SIZE set. > > Signed-off-by: Changheun Lee <nanich.lee@samsung.com> > Signed-off-by: nanich.lee <nanich.lee@samsung.com> > --- > Documentation/ABI/testing/sysfs-block | 10 ++++++++++ > Documentation/block/queue-sysfs.rst | 7 +++++++ > block/blk-sysfs.c | 3 +++ > 3 files changed, 20 insertions(+) Hi, This is the friendly patch-bot of Greg Kroah-Hartman. You have sent him a patch that has triggered this response. He used to manually respond to these common problems, but in order to save his sanity (he kept writing the same thing over and over, yet to different people), I was created. Hopefully you will not take offence and will fix the problem in your patch and resubmit it so that it can be accepted into the Linux kernel tree. You are receiving this message because of the following common error(s) as indicated below: - This looks like a new version of a previously submitted patch, but you did not list below the --- line any changes from the previous version. Please read the section entitled "The canonical patch format" in the kernel file, Documentation/SubmittingPatches for what needs to be done here to properly describe this. If you wish to discuss this problem further, or you have questions about how to resolve this issue, please feel free to respond to this email and Greg will reply once he has dug out from the pending patches received from other developers. thanks, greg k-h's patch email bot
diff --git a/Documentation/ABI/testing/sysfs-block b/Documentation/ABI/testing/sysfs-block index e34cdeeeb9d4..86a7b15410cf 100644 --- a/Documentation/ABI/testing/sysfs-block +++ b/Documentation/ABI/testing/sysfs-block @@ -316,3 +316,13 @@ Description: does not complete in this time then the block driver timeout handler is invoked. That timeout handler can decide to retry the request, to fail it or to start a device recovery strategy. + +What: /sys/block/<disk>/queue/limit_bio_size +Date: Feb, 2021 +Contact: Changheun Lee <nanich.lee@samsung.com> +Description: + (RW) Toggle for set/clear QUEUE_FLAG_LIMIT_BIO_SIZE queue flag. + Queue flag QUEUE_FLAG_LIMIT_BIO_SIZE will be set if limit_bio_size + is set. And bio max size will be limited by queue max sectors. + QUEUE_FLAG_LIMIT_BIO_SIZE will be cleared if limit_bio_size is + cleard. And limit of bio max size will be cleard. diff --git a/Documentation/block/queue-sysfs.rst b/Documentation/block/queue-sysfs.rst index 2638d3446b79..cd371a821855 100644 --- a/Documentation/block/queue-sysfs.rst +++ b/Documentation/block/queue-sysfs.rst @@ -273,4 +273,11 @@ devices are described in the ZBC (Zoned Block Commands) and ZAC do not support zone commands, they will be treated as regular block devices and zoned will report "none". +limit_bio_size (RW) +------------------- +This indicates QUEUE_FLAG_LIMIT_BIO_SIZE queue flag value. And +QUEUE_FLAG_LIMIT_BIO_SIZE can be changed via set(1)/clear(0) this node. +bio max size will be limited by queue max sectors via set this node. And +limit of bio max size will be cleard via clear this node. + Jens Axboe <jens.axboe@oracle.com>, February 2009 diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c index b513f1683af0..840d97f427e6 100644 --- a/block/blk-sysfs.c +++ b/block/blk-sysfs.c @@ -288,6 +288,7 @@ QUEUE_SYSFS_BIT_FNS(nonrot, NONROT, 1); QUEUE_SYSFS_BIT_FNS(random, ADD_RANDOM, 0); QUEUE_SYSFS_BIT_FNS(iostats, IO_STAT, 0); QUEUE_SYSFS_BIT_FNS(stable_writes, STABLE_WRITES, 0); +QUEUE_SYSFS_BIT_FNS(limit_bio_size, LIMIT_BIO_SIZE, 0); #undef QUEUE_SYSFS_BIT_FNS static ssize_t queue_zoned_show(struct request_queue *q, char *page) @@ -615,6 +616,7 @@ QUEUE_RW_ENTRY(queue_nonrot, "rotational"); QUEUE_RW_ENTRY(queue_iostats, "iostats"); QUEUE_RW_ENTRY(queue_random, "add_random"); QUEUE_RW_ENTRY(queue_stable_writes, "stable_writes"); +QUEUE_RW_ENTRY(queue_limit_bio_size, "limit_bio_size"); static struct attribute *queue_attrs[] = { &queue_requests_entry.attr, @@ -648,6 +650,7 @@ static struct attribute *queue_attrs[] = { &queue_rq_affinity_entry.attr, &queue_iostats_entry.attr, &queue_stable_writes_entry.attr, + &queue_limit_bio_size_entry.attr, &queue_random_entry.attr, &queue_poll_entry.attr, &queue_wc_entry.attr,