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SubjectRe: [[PATCH]] mm: khugepaged: recalculate min_free_kbytes after memory hotplug as expected by khugepaged

On 9/10/2020 3:01 PM, Kirill A. Shutemov wrote:
> 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 <>
>> Cc:
> NAK. It would override min_free_kbytes set by user.

Hi Kirill,

To fix the issue you raised I just submitted



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