linux-kernel - Re: [PATCH] ring-buffer: Add set/clear_current_oom

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Message-ID: <20180405094346.104cf288@gandalf.local.home>
Date:   Thu, 5 Apr 2018 09:43:46 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Joel Fernandes <joelaf@...gle.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Michal Hocko <mhocko@...nel.org>,
        Zhaoyang Huang <huangzhaoyang@...il.com>,
        Ingo Molnar <mingo@...nel.org>,
        kernel-patch-test@...ts.linaro.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        "open list:MEMORY MANAGEMENT" <linux-mm@...ck.org>,
        Vlastimil Babka <vbabka@...e.cz>
Subject: Re: [PATCH] ring-buffer: Add set/clear_current_oom_origin() during
 allocations

On Wed, 4 Apr 2018 16:59:18 -0700
Joel Fernandes <joelaf@...gle.com> wrote:

> Happy to try anything else, BTW when the si_mem_available check
> enabled, this doesn't happen and the buffer_size_kb write fails
> normally without hurting anything else.

Can you remove the RETRY_MAYFAIL and see if you can try again? It may
be that we just remove that, and if si_mem_available() is wrong, it
will kill the process :-/ My original code would only add MAYFAIL if it
was a kernel thread (which is why I created the mflags variable).

-- Steve