diff options
| author | Javier González <jg@lightnvm.io> | 2017-06-30 17:56:37 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2017-06-30 11:08:18 -0600 |
| commit | 10888129783cc8daeeb9c47942876b917532b58c (patch) | |
| tree | 1658076640b2113a91e191f72e4033c8d40b6a9f | |
| parent | 653cbb8472b88f0781d9191685bd6603f344214d (diff) | |
| download | op-kernel-dev-10888129783cc8daeeb9c47942876b917532b58c.zip op-kernel-dev-10888129783cc8daeeb9c47942876b917532b58c.tar.gz | |
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: Javier González <javier@cnexlabs.com>
Signed-off-by: Matias Bjørling <matias@cnexlabs.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| -rw-r--r-- | drivers/lightnvm/pblk-rb.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/lightnvm/pblk-rb.c b/drivers/lightnvm/pblk-rb.c index 665a4cc..2dda874 100644 --- a/drivers/lightnvm/pblk-rb.c +++ b/drivers/lightnvm/pblk-rb.c @@ -578,8 +578,10 @@ unsigned int pblk_rb_read_to_bio(struct pblk_rb *rb, struct nvm_rq *rqd, */ try: flags = READ_ONCE(entry->w_ctx.flags); - if (!(flags & PBLK_WRITTEN_DATA)) + if (!(flags & PBLK_WRITTEN_DATA)) { + io_schedule(); goto try; + } page = virt_to_page(entry->data); if (!page) { |
