Commit 10888129 authored by Javier González's avatar Javier González Committed by Jens Axboe

lightnvm: pblk: schedule if data is not ready

When user threads place data into the write buffer, they reserve space
and do the memory copy out of the lock. As a consequence, when the write
thread starts persisting data, there is a chance that it is not copied
yet. In this case, avoid polling, and schedule before retrying.
Signed-off-by: default avatarJavier González <javier@cnexlabs.com>
Signed-off-by: default avatarMatias Bjørling <matias@cnexlabs.com>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 653cbb84
...@@ -578,8 +578,10 @@ unsigned int pblk_rb_read_to_bio(struct pblk_rb *rb, struct nvm_rq *rqd, ...@@ -578,8 +578,10 @@ unsigned int pblk_rb_read_to_bio(struct pblk_rb *rb, struct nvm_rq *rqd,
*/ */
try: try:
flags = READ_ONCE(entry->w_ctx.flags); flags = READ_ONCE(entry->w_ctx.flags);
if (!(flags & PBLK_WRITTEN_DATA)) if (!(flags & PBLK_WRITTEN_DATA)) {
io_schedule();
goto try; goto try;
}
page = virt_to_page(entry->data); page = virt_to_page(entry->data);
if (!page) { if (!page) {
......
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