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Subject: Re: [RFC PATCH] mm/hugetlb: make hugetlb_lock irq safe
References: <20180905112341.21355-1-aneesh.kumar@linux.ibm.com>
 <20180905130440.GA3729@bombadil.infradead.org>
 <d76771e6-1664-5d38-a5a0-e98f1120494c@linux.ibm.com>
 <20180905134848.GB3729@bombadil.infradead.org>
 <20180905125846.eb0a9ed907b293c1b4c23c23@linux-foundation.org>
 <78b08258-14c8-0e90-97c7-d647a11acb30@oracle.com>
 <20180905150008.59d477c1f78f966a8f9c3cc8@linux-foundation.org>
 <20180905230737.GA14977@bombadil.infradead.org>
 <c03c8851-ce18-56c6-3f37-47f585d70b19@oracle.com>
From: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
Date: Thu, 6 Sep 2018 09:33:45 +0530
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To: Mike Kravetz <mike.kravetz@oracle.com>, Matthew Wilcox <willy@infradead.org>, Andrew Morton <akpm@linux-foundation.org>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org

On 09/06/2018 05:21 AM, Mike Kravetz wrote:

> 
> BTW, free_huge_page called by put_page for hugetlbfs pages may also take
> a subpool specific lock via spin_lock().  See hugepage_subpool_put_pages.
> So, this would also need to take irq context into account.
> 

I missed that. I can take care of that in next patch update based on 
what we decide w.r.t this patch.

-aneesh