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From: Guenter Roeck <linux@roeck-us.net>
To: Vitaly Wool <vitalywool@gmail.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	mawilcox@microsoft.com, asavery@chromium.org,
	gwendal@chromium.org
Subject: Re: Crashes/hung tasks with z3pool under memory pressure
Date: Mon, 16 Apr 2018 15:37:07 -0700	[thread overview]
Message-ID: <20180416223707.GA26180@roeck-us.net> (raw)
In-Reply-To: <b5158eef-2fbd-ce8c-1c8c-6c38ec837f1d@gmail.com>

On Tue, Apr 17, 2018 at 12:14:37AM +0200, Vitaly Wool wrote:
[ ... ]
> Ugh. Could you please keep that patch and apply this on top:
> 
> diff --git a/mm/z3fold.c b/mm/z3fold.c
> index c0bca6153b95..e8a80d044d9e 100644
> --- a/mm/z3fold.c
> +++ b/mm/z3fold.c
> @@ -840,6 +840,7 @@ static int z3fold_reclaim_page(struct z3fold_pool *pool, unsigned int retries)
>  			kref_get(&zhdr->refcount);
>  			list_del_init(&zhdr->buddy);
>  			zhdr->cpu = -1;
> +			break;
>  		}
>  		list_del_init(&page->lru);
> 
Much better, in a way. The system now takes much longer to crash,
and the crash reason is a bit different. The log is too long to attach,
so I copied it to [1].

crashdump.0002			Latest log
000[12]-Fix-attempt-[12].patch	Patches applied on top of v4.17.0-rc1.

Hope it helps,
Guenter


[1] http://server.roeck-us.net/qemu/z3pool/

  reply	other threads:[~2018-04-16 22:37 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-12 22:01 Crashes/hung tasks with z3pool under memory pressure Guenter Roeck
2018-04-13  5:21 ` Vitaly Wool
2018-04-13 17:35   ` Guenter Roeck
     [not found]     ` <CAMJBoFPXObpXyQWz-zPJ7JnC-Z5FqqrLfr5BFWKdh+szZrPZ7A@mail.gmail.com>
2018-04-13 17:56       ` Guenter Roeck
2018-04-16 12:43         ` Vitaly Wool
2018-04-16 15:58           ` Guenter Roeck
2018-04-16 22:14             ` Vitaly Wool
2018-04-16 22:37               ` Guenter Roeck [this message]
2018-04-17 14:00 Vitaly Wool
2018-04-17 16:35 ` Guenter Roeck
2018-04-18  8:13 ` Vitaly Wool
2018-04-18 16:07   ` Guenter Roeck
     [not found]     ` <CAMJBoFO9ktEHK=e=Dkq99tNNKHM1iPuxUJ5bmyoX_bzjGwOmig@mail.gmail.com>
2018-04-27 17:18       ` Guenter Roeck

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