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block: add a struct io_comp_batch argument to fops->iopoll()

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struct io_comp_batch contains a list head and a completion handler, which
will allow completions to more effciently completed batches of IO.

For now, no functional changes in this patch, we just define the
io_comp_batch structure and add the argument to the file_operations iopoll
handler.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2021-10-12 09:24:29 -06:00
parent 013a7f9543
commit 5a72e899ce
16 changed files with 39 additions and 25 deletions
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2
mm/page_io.c
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@ -424,7 +424,7 @@ int swap_readpage(struct page *page, bool synchronous)
if (!READ_ONCE(bio->bi_private))
break;
if (!bio_poll(bio, 0))
if (!bio_poll(bio, NULL, 0))
blk_io_schedule();
}
__set_current_state(TASK_RUNNING);