Re: [PATCH RFC] fs/fcntl: add fcntl F_GET_RSS

[Florian Weimer]

* Konstantin Khlebnikov:

> On 28/10/2019 14.46, Florian Weimer wrote:
>> * Konstantin Khlebnikov:
>> 
>>> This implements fcntl() for getting amount of resident memory in cache.
>>> Kernel already maintains counter for each inode, this patch just exposes
>>> it into userspace. Returned size is in kilobytes like values in procfs.
>> 
>> I think this needs a 32-bit compat implementation which clamps the
>> returned value to INT_MAX.
>> 
>
> 32-bit machine couldn't hold more than 2TB cache in one file.
> Even radix tree wouldn't fit into low memory area.

I meant a 32-bit process running on a 64-bit kernel.