linux-kernel - Re: [PATCH 2/2] cgroup/misc: Change counters to be explicit 64bit types

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Message-ID: <op.18evfdcdwjvjmi@hhuan26-mobl.amr.corp.intel.com>
Date:   Thu, 20 Jul 2023 21:48:39 -0500
From:   "Haitao Huang" <haitao.huang@...ux.intel.com>
To:     "Tejun Heo" <tj@...nel.org>
Cc:     jarkko@...nel.org, dave.hansen@...ux.intel.com,
        linux-kernel@...r.kernel.org, linux-sgx@...r.kernel.org,
        cgroups@...r.kernel.org, "Zefan Li" <lizefan.x@...edance.com>,
        "Johannes Weiner" <hannes@...xchg.org>, vipinsh@...gle.com,
        kai.huang@...el.com, reinette.chatre@...el.com,
        zhiquan1.li@...el.com, kristen@...ux.intel.com
Subject: Re: [PATCH 2/2] cgroup/misc: Change counters to be explicit 64bit
 types

Hi
On Tue, 18 Jul 2023 17:52:10 -0500, Tejun Heo <tj@...nel.org> wrote:

> On Mon, Jul 17, 2023 at 06:08:45PM -0700, Haitao Huang wrote:
>> So the variables can account for resources of huge quantities even on
>> 32-bit machines.
>>
>> Signed-off-by: Haitao Huang <haitao.huang@...ux.intel.com>
>
> Applied to cgroup/for-6.6 with some whitespace adjustments. I think the  
> code
> is broken when we cross the signed boundary but that's not a new problem
> caused by your patch. I think what we should do is to treat atomic64_t  
> reads
> as u64 instead of putting it in s64.
>

Thanks. I think you meant the 'new_usage' in try_charge.
I'll send a patch.
BR
Haitao