From: Adrian Hunter <adrian.hunter-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
To: Douglas Anderson
<dianders-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>,
Ulf Hansson <ulf.hansson-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
Linus Walleij
<linus.walleij-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
Cc: Jens Axboe <axboe-tSWWG44O7X1aa/9Udqfwiw@public.gmane.org>,
Hannes Reinecke <hare-IBi9RG/b67k@public.gmane.org>,
drinkcat-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org,
linux-mmc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Ming Lei <ming.lei-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
linux-rockchip-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
mka-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org,
groeck-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org,
Omar Sandoval <osandov-b10kYP2dOMg@public.gmane.org>
Subject: Re: [PATCH] mmc: block: Fix memory leak in blk-mq when cleaning up
Date: Mon, 6 May 2019 10:22:51 +0300 [thread overview]
Message-ID: <c7dde396-6536-bd9b-95af-9ed57fbebc86@intel.com> (raw)
In-Reply-To: <20190503233526.226272-1-dianders-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>
On 4/05/19 2:35 AM, Douglas Anderson wrote:
> If I run the following on rk3288-veyron-minnie (a 2GB machine)
>
> cd /sys/bus/platform/drivers/dwmmc_rockchip
> for i in $(seq 1 3000); do
> echo "========================" $i
> echo ff0f0000.dwmmc > unbind
> sleep .5
> echo ff0f0000.dwmmc > bind
> while true; do
> if [ -e /dev/mmcblk2 ]; then
> break;
> fi
> sleep .1
> done
> done
>
> Then I start OOMing somewhere between iteration 200 and 250. Using
> kmemleak, I see reports like:
>
> unreferenced object 0xe39c5580 (size 64):
> comm "kworker/1:0", pid 17, jiffies 4294821091 (age 96.952s)
> hex dump (first 32 bytes):
> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
> backtrace:
> [<ad19d10a>] __kmalloc+0x1ec/0x2dc
> [<a28614c3>] blk_mq_alloc_tag_set+0x27c/0x2bc
> [<0955ae01>] mmc_init_queue+0xa8/0x2a8
> [<5102b986>] mmc_blk_alloc_req+0xf8/0x2d4
> [<f1c2214f>] mmc_blk_probe+0x4a8/0x6c0
> [<0dfdd9d5>] mmc_bus_probe+0x24/0x28
>
> It's pretty clear that we're missing a call to blk_mq_free_tag_set().
> Let's add it.
>
> Fixes: 81196976ed94 ("mmc: block: Add blk-mq support")
> Signed-off-by: Douglas Anderson <dianders-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>
Same as:
https://lore.kernel.org/lkml/20190502190714.181664-1-rrangel-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org/
> ---
>
> drivers/mmc/core/queue.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/drivers/mmc/core/queue.c b/drivers/mmc/core/queue.c
> index 7c364a9c4eeb..09071e13282e 100644
> --- a/drivers/mmc/core/queue.c
> +++ b/drivers/mmc/core/queue.c
> @@ -480,6 +480,8 @@ void mmc_cleanup_queue(struct mmc_queue *mq)
> */
> flush_work(&mq->complete_work);
>
> + blk_mq_free_tag_set(&mq->tag_set);
> +
> mq->card = NULL;
> }
>
>
prev parent reply other threads:[~2019-05-06 7:22 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-03 23:35 [PATCH] mmc: block: Fix memory leak in blk-mq when cleaning up Douglas Anderson
2019-05-03 23:52 ` Matthias Kaehlcke
2019-05-04 0:20 ` Guenter Roeck
[not found] ` <20190503233526.226272-1-dianders-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>
2019-05-04 11:57 ` Linus Walleij
2019-05-06 7:22 ` Adrian Hunter [this message]
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