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From: "Javier González" <javier@javigon.com>
To: "Konopko, Igor J" <igor.j.konopko@intel.com>
Cc: "Matias Bjørling" <mb@lightnvm.io>,
	"Hans Holmberg" <hans.holmberg@cnexlabs.com>,
	linux-block@vger.kernel.org
Subject: Re: [PATCH 01/13] lightnvm: pblk: Line reference fix in GC
Date: Mon, 4 Mar 2019 08:18:32 +0100	[thread overview]
Message-ID: <A2244D44-B6C9-4208-86F4-D440A1B6EFB7@javigon.com> (raw)
In-Reply-To: <20190227171442.11853-2-igor.j.konopko@intel.com>

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> On 27 Feb 2019, at 18.14, Igor Konopko <igor.j.konopko@intel.com> wrote:
> 
> This patch fixes the error case in GC when
> we both moves line back to closed state and
> release additional reference, what cause illegal
> transition from closed to free on pblk_line_put
> when only gc to free line state transition is
> allowed using that path.
> 
> Signed-off-by: Igor Konopko <igor.j.konopko@intel.com>
> ---
> drivers/lightnvm/pblk-gc.c | 5 ++++-
> 1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/lightnvm/pblk-gc.c b/drivers/lightnvm/pblk-gc.c
> index 2fa118c8eb71..3feadfd9418d 100644
> --- a/drivers/lightnvm/pblk-gc.c
> +++ b/drivers/lightnvm/pblk-gc.c
> @@ -290,8 +290,11 @@ static void pblk_gc_line_prepare_ws(struct work_struct *work)
> fail_free_ws:
> 	kfree(line_ws);
> 
> +	/* Line goes back to closed state, so we cannot release additional
> +	 * reference for line, since we do that only when we want to do
> +	 * gc to free line state transition.
> +	 */
> 	pblk_put_line_back(pblk, line);
> -	kref_put(&line->ref, pblk_line_put);
> 	atomic_dec(&gc->read_inflight_gc);
> 
> 	pblk_err(pblk, "failed to GC line %d\n", line->id);
> --
> 2.17.1

Looks good to me

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

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  parent reply	other threads:[~2019-03-04  7:18 UTC|newest]

Thread overview: 91+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-02-27 17:14 [PATCH 00/13] lightnvm: bugfixes and improvements Igor Konopko
2019-02-27 17:14 ` [PATCH 01/13] lightnvm: pblk: Line reference fix in GC Igor Konopko
2019-03-01 12:20   ` Hans Holmberg
2019-03-04  7:18   ` Javier González [this message]
2019-03-04 12:40   ` Matias Bjørling
2019-02-27 17:14 ` [PATCH 02/13] lightnvm: pblk: Gracefully handle GC data malloc fail Igor Konopko
2019-02-28 17:08   ` Javier González
2019-03-01 12:50     ` Hans Holmberg
2019-03-04 12:38       ` Igor Konopko
2019-02-27 17:14 ` [PATCH 03/13] lightnvm: pblk: Fix put line back behaviour Igor Konopko
2019-03-01 13:27   ` Hans Holmberg
2019-03-04  7:22   ` Javier González
2019-02-27 17:14 ` [PATCH 04/13] lightnvm: pblk: Rollback in gc read Igor Konopko
2019-03-04  7:38   ` Javier González
2019-03-04  8:44     ` Hans Holmberg
2019-03-04 12:39       ` Igor Konopko
2019-03-04 12:42         ` Hans Holmberg
2019-03-04 12:49   ` Matias Bjørling
2019-02-27 17:14 ` [PATCH 05/13] lightnvm: pblk: Count all read errors in stats Igor Konopko
2019-03-04  7:42   ` Javier González
2019-03-04  9:02     ` Hans Holmberg
2019-03-04  9:23       ` Javier González
2019-03-04 11:41         ` Hans Holmberg
2019-03-04 11:45           ` Javier González
2019-03-04 12:42             ` Igor Konopko
2019-03-04 12:48               ` Hans Holmberg
2019-02-27 17:14 ` [PATCH 06/13] lightnvm: pblk: Ensure that erase is chunk aligned Igor Konopko
2019-03-04  7:48   ` Javier González
2019-03-04  9:05     ` Hans Holmberg
2019-03-04  9:11       ` Javier González
2019-03-04 11:43         ` Hans Holmberg
2019-03-04 12:44           ` Igor Konopko
2019-03-04 12:57             ` Hans Holmberg
2019-03-04 13:00             ` Matias Bjørling
2019-03-05  8:20               ` Hans Holmberg
2019-03-05  8:26                 ` Igor Konopko
2019-03-05  8:40                   ` Hans Holmberg
     [not found]                     ` <61b7e62a-d229-95b1-2572-336ab1bd67cb@intel.com>
2019-03-05  8:55                       ` Hans Holmberg
2019-02-27 17:14 ` [PATCH 07/13] lightnvm: pblk: Cleanly fail when there is not enough memory Igor Konopko
2019-03-04  7:53   ` Javier González
2019-03-04  9:24     ` Hans Holmberg
2019-03-04 12:46       ` Igor Konopko
2019-02-27 17:14 ` [PATCH 08/13] lightnvm: pblk: Set proper read stutus in bio Igor Konopko
2019-03-04  8:03   ` Javier González
2019-03-04  9:35     ` Hans Holmberg
2019-03-04  9:48       ` Javier González
2019-03-04 12:14         ` Hans Holmberg
2019-03-04 12:51           ` Igor Konopko
2019-03-04 13:08             ` Matias Bjørling
2019-03-04 13:45               ` Javier González
2019-03-04 15:12                 ` Matias Bjørling
2019-03-05  6:43                   ` Javier González
2019-03-04 13:04         ` Matias Bjørling
2019-03-04 13:21           ` Javier González
2019-02-27 17:14 ` [PATCH 09/13] lightnvm: pblk: Kick writer for flush requests Igor Konopko
2019-03-04  8:08   ` Javier González
2019-03-04  9:39     ` Hans Holmberg
2019-03-04 12:52       ` Igor Konopko
2019-02-27 17:14 ` [PATCH 10/13] lightnvm: pblk: Reduce L2P DRAM footprint Igor Konopko
2019-03-04  8:17   ` Javier González
2019-03-04  9:29     ` Hans Holmberg
2019-03-04 13:11   ` Matias Bjørling
2019-02-27 17:14 ` [PATCH 11/13] lightnvm: pblk: Remove unused smeta_ssec field Igor Konopko
2019-03-04  8:21   ` Javier González
2019-03-04  9:40     ` Hans Holmberg
2019-02-27 17:14 ` [PATCH 12/13] lightnvm: pblk: close opened chunks Igor Konopko
2019-03-04  8:27   ` Javier González
2019-03-04 10:05     ` Hans Holmberg
2019-03-04 12:56       ` Igor Konopko
2019-03-04 13:03         ` Hans Holmberg
2019-03-04 13:19       ` Matias Bjørling
2019-03-04 13:48         ` Javier González
2019-03-04 13:18     ` Matias Bjørling
2019-03-04 13:47       ` Javier González
2019-02-27 17:14 ` [PATCH 13/13] lightnvm: Inherit mdts from the parent nvme device Igor Konopko
2019-03-04  9:05   ` Javier González
2019-03-04 11:30     ` Hans Holmberg
2019-03-04 11:44       ` Javier González
2019-03-04 12:22         ` Hans Holmberg
2019-03-04 13:04           ` Igor Konopko
2019-03-04 13:16             ` Hans Holmberg
2019-03-04 14:06             ` Javier González
2019-03-04 13:19           ` Javier González
2019-03-04 13:25             ` Matias Bjørling
2019-03-04 13:44               ` Javier González
2019-03-04 14:24                 ` Hans Holmberg
2019-03-04 14:27                   ` Javier González
2019-03-04 14:58                 ` Matias Bjørling
2019-02-28 16:36 ` [PATCH 00/13] lightnvm: bugfixes and improvements Matias Bjørling
2019-02-28 17:15   ` Javier González
2019-03-01 10:23   ` Hans Holmberg

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