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Date:   Thu, 29 Apr 2021 07:47:51 +0100
From:   Christoph Hellwig <hch@infradead.org>
To:     Muchun Song <songmuchun@bytedance.com>
Cc:     willy@infradead.org, akpm@linux-foundation.org, hannes@cmpxchg.org,
        mhocko@kernel.org, vdavydov.dev@gmail.com, shakeelb@google.com,
        guro@fb.com, shy828301@gmail.com, alexs@kernel.org,
        alexander.h.duyck@linux.intel.com, richard.weiyang@gmail.com,
        linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-mm@kvack.org
Subject: Re: [PATCH 7/9] ida: introduce ida_max() to return the maximum
 allocated ID
Message-ID: <20210429064751.GA2216380@infradead.org>
References: <20210428094949.43579-1-songmuchun@bytedance.com>
 <20210428094949.43579-8-songmuchun@bytedance.com>
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On Wed, Apr 28, 2021 at 05:49:47PM +0800, Muchun Song wrote:
> Introduce ida_max() to return the maximum allocated ID. This will be
> used by memory cgroup in the later patch.

Please also add a lower-level xa_max as this funcationalty would also
come in handy at the xarray level in a few places.