From: Steven Rostedt <rostedt@goodmis.org>
To: Michal Hocko <mhocko@kernel.org>
Cc: Zhaoyang Huang <huangzhaoyang@gmail.com>,
Ingo Molnar <mingo@kernel.org>,
linux-kernel@vger.kernel.org, kernel-patch-test@lists.linaro.org,
Andrew Morton <akpm@linux-foundation.org>,
Joel Fernandes <joelaf@google.com>,
linux-mm@kvack.org, Vlastimil Babka <vbabka@suse.cz>
Subject: Re: [PATCH v1] kernel/trace:check the val against the available mem
Date: Wed, 4 Apr 2018 11:47:30 -0400 [thread overview]
Message-ID: <20180404114730.65118279@gandalf.local.home> (raw)
In-Reply-To: <20180404142329.GI6312@dhcp22.suse.cz>
On Wed, 4 Apr 2018 16:23:29 +0200
Michal Hocko <mhocko@kernel.org> wrote:
> >
> > I tried it out, I did the following:
> >
> > set_current_oom_origin();
> > for (i = 0; i < nr_pages; i++) {
> > struct page *page;
> > /*
> > * __GFP_RETRY_MAYFAIL flag makes sure that the allocation fails
> > * gracefully without invoking oom-killer and the system is not
> > * destabilized.
> > */
> > bpage = kzalloc_node(ALIGN(sizeof(*bpage), cache_line_size()),
> > GFP_KERNEL | __GFP_RETRY_MAYFAIL,
> > cpu_to_node(cpu));
> > if (!bpage)
> > goto free_pages;
> >
> > list_add(&bpage->list, pages);
> >
> > page = alloc_pages_node(cpu_to_node(cpu),
> > GFP_KERNEL | __GFP_RETRY_MAYFAIL, 0);
> > if (!page)
> > goto free_pages;
>
> if (fatal_signal_pending())
> fgoto free_pages;
I originally was going to remove the RETRY_MAYFAIL, but adding this
check (at the end of the loop though) appears to have OOM consistently
kill this task.
I still like to keep RETRY_MAYFAIL, because it wont trigger OOM if
nothing comes in and tries to do an allocation, but instead will fail
nicely with -ENOMEM.
-- Steve
>
> > bpage->page = page_address(page);
> > rb_init_page(bpage->page);
> > }
> > clear_current_oom_origin();
next prev parent reply other threads:[~2018-04-04 15:47 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-29 10:41 [PATCH v1] kernel/trace:check the val against the available mem Zhaoyang Huang
2018-03-29 16:05 ` Steven Rostedt
2018-03-30 3:32 ` Zhaoyang Huang
2018-03-30 14:07 ` Steven Rostedt
2018-03-30 6:53 ` [Kernel-patch-test] " kbuild test robot
2018-03-30 6:54 ` kbuild test robot
2018-03-30 14:20 ` Steven Rostedt
2018-03-30 16:37 ` Joel Fernandes
2018-03-30 19:10 ` Steven Rostedt
2018-03-30 20:37 ` Joel Fernandes
2018-03-30 20:53 ` Matthew Wilcox
2018-03-30 21:30 ` Steven Rostedt
2018-03-30 21:42 ` Steven Rostedt
2018-03-30 23:38 ` Joel Fernandes
2018-03-31 1:41 ` Steven Rostedt
2018-03-31 2:18 ` Matthew Wilcox
2018-03-31 3:07 ` Steven Rostedt
2018-03-31 5:44 ` Joel Fernandes
2018-04-02 0:52 ` Zhaoyang Huang
2018-04-03 11:06 ` Michal Hocko
2018-04-03 11:51 ` Steven Rostedt
2018-04-03 12:16 ` Michal Hocko
2018-04-03 12:23 ` Steven Rostedt
2018-04-03 12:35 ` Michal Hocko
2018-04-03 13:32 ` Steven Rostedt
2018-04-03 13:56 ` Michal Hocko
2018-04-03 14:17 ` Steven Rostedt
2018-04-03 16:11 ` Michal Hocko
2018-04-03 16:59 ` Steven Rostedt
2018-04-03 22:56 ` Steven Rostedt
2018-04-04 6:20 ` Michal Hocko
2018-04-04 12:21 ` Joel Fernandes
2018-04-04 12:59 ` Steven Rostedt
2018-04-04 14:10 ` Michal Hocko
2018-04-04 14:25 ` Steven Rostedt
2018-04-04 14:42 ` Michal Hocko
2018-04-04 15:04 ` Steven Rostedt
2018-04-04 15:27 ` Michal Hocko
2018-04-04 15:38 ` Steven Rostedt
2018-04-04 2:58 ` Zhaoyang Huang
2018-04-04 6:23 ` Michal Hocko
2018-04-04 9:29 ` Zhaoyang Huang
2018-04-04 14:11 ` Steven Rostedt
2018-04-04 14:23 ` Michal Hocko
2018-04-04 14:31 ` Steven Rostedt
2018-04-04 14:47 ` Michal Hocko
2018-04-04 15:47 ` Steven Rostedt [this message]
2018-04-05 2:58 ` Matthew Wilcox
2018-04-05 4:12 ` Joel Fernandes
2018-04-05 14:22 ` Matthew Wilcox
2018-04-05 14:27 ` Michal Hocko
2018-04-05 14:34 ` Steven Rostedt
2018-04-05 15:13 ` Matthew Wilcox
2018-04-05 15:32 ` Michal Hocko
2018-04-05 16:15 ` Matthew Wilcox
2018-04-05 18:54 ` Michal Hocko
2018-04-05 20:15 ` __GFP_LOW Matthew Wilcox
2018-04-06 6:09 ` __GFP_LOW Michal Hocko
2018-04-08 4:27 ` __GFP_LOW Matthew Wilcox
2018-04-09 7:34 ` __GFP_LOW Michal Hocko
2018-04-09 15:51 ` __GFP_LOW Matthew Wilcox
2018-04-09 18:14 ` __GFP_LOW Michal Hocko
[not found] ` <CA+JonM0HG9kWb6-0iyDQ8UMxTeR-f=+ZL89t5DvvDULDC8Sfyw@mail.gmail.com>
2018-04-10 12:19 ` __GFP_LOW Matthew Wilcox
2018-04-05 14:30 ` [PATCH v1] kernel/trace:check the val against the available mem Steven Rostedt
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