From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
To: Vijay Balakrishna <vijayb@linux.microsoft.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Oleg Nesterov <oleg@redhat.com>, Song Liu <songliubraving@fb.com>,
Andrea Arcangeli <aarcange@redhat.com>,
Pavel Tatashin <pasha.tatashin@soleen.com>,
Allen Pais <apais@microsoft.com>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [[PATCH]] mm: khugepaged: recalculate min_free_kbytes after memory hotplug as expected by khugepaged
Date: Fri, 11 Sep 2020 01:01:45 +0300 [thread overview]
Message-ID: <20200910220145.5j7iogqulmvg5vr6@black.fi.intel.com> (raw)
In-Reply-To: <1599770859-14826-1-git-send-email-vijayb@linux.microsoft.com>
On Thu, Sep 10, 2020 at 01:47:39PM -0700, Vijay Balakrishna wrote:
> When memory is hotplug added or removed the min_free_kbytes must be
> recalculated based on what is expected by khugepaged. Currently
> after hotplug, min_free_kbytes will be set to a lower default and higher
> default set when THP enabled is lost. This leaves the system with small
> min_free_kbytes which isn't suitable for systems especially with network
> intensive loads. Typical failure symptoms include HW WATCHDOG reset,
> soft lockup hang notices, NETDEVICE WATCHDOG timeouts, and OOM process
> kills.
>
> Fixes: f000565adb77 ("thp: set recommended min free kbytes")
>
> Signed-off-by: Vijay Balakrishna <vijayb@linux.microsoft.com>
> Cc: stable@vger.kernel.org
NAK. It would override min_free_kbytes set by user.
--
Kirill A. Shutemov
next prev parent reply other threads:[~2020-09-10 22:01 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-10 20:47 Vijay Balakrishna
2020-09-10 22:01 ` Kirill A. Shutemov [this message]
2020-09-10 22:28 ` Pavel Tatashin
2020-09-10 22:56 ` Vijay Balakrishna
2020-09-15 5:04 ` Vijay Balakrishna
2020-09-14 14:33 ` Michal Hocko
2020-09-14 16:57 ` Vijay Balakrishna
2020-09-15 8:18 ` Michal Hocko
2020-09-15 15:48 ` Vijay Balakrishna
2020-09-16 6:53 ` Michal Hocko
2020-09-16 18:28 ` Vijay Balakrishna
2020-09-17 12:12 ` Michal Hocko
2020-09-17 18:03 ` Vijay Balakrishna
2020-09-18 5:45 ` Michal Hocko
2020-09-18 15:32 ` Vijay Balakrishna
2020-09-21 7:00 ` Michal Hocko
2020-09-15 18:22 ` Pavel Tatashin
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