linux-kernel - Re: [PATCH v2 3/3] lightnvm: pblk: fix smeta write error path

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Message-ID: <E2E27D56-61CE-4882-8D78-1427CF70CE7A@cnexlabs.com>
Date:   Mon, 30 Apr 2018 09:19:25 +0000
From:   Javier Gonzalez <javier@...xlabs.com>
To:     Hans Holmberg <hans.ml.holmberg@...tronix.com>
CC:     Matias Bjørling <mb@...htnvm.io>,
        "linux-block@...r.kernel.org" <linux-block@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Hans Holmberg <hans.holmberg@...xlabs.com>
Subject: Re: [PATCH v2 3/3] lightnvm: pblk: fix smeta write error path

> On 24 Apr 2018, at 07.45, Hans Holmberg <hans.ml.holmberg@...tronix.com> wrote:
> 
> From: Hans Holmberg <hans.holmberg@...xlabs.com>
> 
> Smeta write errors were previously ignored. Skip these
> lines instead and throw them back on the free
> list, so the chunks will go through a reset cycle
> before we attempt to use the line again.
> 
> Signed-off-by: Hans Holmberg <hans.holmberg@...xlabs.com>
> ---
> drivers/lightnvm/pblk-core.c | 7 ++++---
> 1 file changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/lightnvm/pblk-core.c b/drivers/lightnvm/pblk-core.c
> index 413cf3b..dec1bb4 100644
> --- a/drivers/lightnvm/pblk-core.c
> +++ b/drivers/lightnvm/pblk-core.c
> @@ -849,9 +849,10 @@ static int pblk_line_submit_smeta_io(struct pblk *pblk, struct pblk_line *line,
> 	atomic_dec(&pblk->inflight_io);
> 
> 	if (rqd.error) {
> -		if (dir == PBLK_WRITE)
> +		if (dir == PBLK_WRITE) {
> 			pblk_log_write_err(pblk, &rqd);
> -		else if (dir == PBLK_READ)
> +			ret = 1;
> +		} else if (dir == PBLK_READ)
> 			pblk_log_read_err(pblk, &rqd);
> 	}
> 
> @@ -1120,7 +1121,7 @@ static int pblk_line_init_bb(struct pblk *pblk, struct pblk_line *line,
> 
> 	if (init && pblk_line_submit_smeta_io(pblk, line, off, PBLK_WRITE)) {
> 		pr_debug("pblk: line smeta I/O failed. Retry\n");
> -		return 1;
> +		return 0;
> 	}
> 
> 	bitmap_copy(line->invalid_bitmap, line->map_bitmap, lm->sec_per_line);
> --
> 2.7.4

LGTM

Reviewed-by: Javier González <javier@...xlabs.com>


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