On Mon, Oct 02, 2017 at 05:16:57PM +0200, Javier González wrote:
> > On 2 Oct 2017, at 13.32, Javier González <jg@xxxxxxxxxxx> wrote:
> >
> >> On 1 Oct 2017, at 15.23, Rakesh Pandit <rakesh@xxxxxxxxxx> wrote:
[..]
> >> -static int __pblk_rb_update_l2p(struct pblk_rb *rb, unsigned int *l2p_upd,
> >> - unsigned int to_update)
> >> +static int __pblk_rb_update_l2p(struct pblk_rb *rb, unsigned int to_update)
> >> {
> >> + unsigned int l2p_update = rb->l2p_update;
> >> struct pblk *pblk = container_of(rb, struct pblk, rwb);
> >> struct pblk_line *line;
> >> struct pblk_rb_entry *entry;
> >> @@ -213,7 +213,7 @@ static int __pblk_rb_update_l2p(struct pblk_rb *rb, unsigned int *l2p_upd,
> >> int flags;
> >>
> >> for (i = 0; i < to_update; i++) {
> >> - entry = &rb->entries[*l2p_upd];
> >> + entry = &rb->entries[l2p_update];
> >> w_ctx = &entry->w_ctx;
> >>
> >> flags = READ_ONCE(entry->w_ctx.flags);
> >> @@ -230,7 +230,7 @@ static int __pblk_rb_update_l2p(struct pblk_rb *rb, unsigned int *l2p_upd,
> >> line = &pblk->lines[pblk_tgt_ppa_to_line(w_ctx->ppa)];
> >> kref_put(&line->ref, pblk_line_put);
> >> clean_wctx(w_ctx);
> >> - *l2p_upd = (*l2p_upd + 1) & (rb->nr_entries - 1);
> >> + rb->l2p_update = (l2p_update + 1) & (rb->nr_entries - 1);
>
> This is wrong. It should be rb->l2p_update when doing +1, otherwise you
> are not using the updated l2p_update value. The result is the pipeline
> stalling as the l2p pointer is left behind.
>
> I'll fix it when picking it up.
>
> Please test the patches before submitting.
Thanks for fixing it. I would be more careful. And will make sure
everything goes through testing before.
Regards,
