From: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
To: Florian Weimer <fw@deneb.enyo.de>
Cc: linux-fsdevel@vger.kernel.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org, linux-api@vger.kernel.org,
Michal Hocko <mhocko@suse.com>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Johannes Weiner <hannes@cmpxchg.org>,
Andrew Morton <akpm@linux-foundation.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Roman Gushchin <guro@fb.com>
Subject: Re: [PATCH RFC] fs/fcntl: add fcntl F_GET_RSS
Date: Mon, 28 Oct 2019 15:55:19 +0300 [thread overview]
Message-ID: <d7e76bee-80c3-d787-b854-91e631ab29cd@yandex-team.ru> (raw)
In-Reply-To: <87k18p6qjk.fsf@mid.deneb.enyo.de>
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.
next prev parent reply other threads:[~2019-10-28 12:55 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-28 10:28 Konstantin Khlebnikov
2019-10-28 11:10 ` Matthew Wilcox
2019-10-28 11:20 ` Konstantin Khlebnikov
2019-10-28 11:46 ` Florian Weimer
2019-10-28 12:55 ` Konstantin Khlebnikov [this message]
2019-10-28 13:05 ` Florian Weimer
2019-10-28 12:27 ` Linus Torvalds
2019-10-28 12:49 ` Konstantin Khlebnikov
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=d7e76bee-80c3-d787-b854-91e631ab29cd@yandex-team.ru \
--to=khlebnikov@yandex-team.ru \
--cc=akpm@linux-foundation.org \
--cc=fw@deneb.enyo.de \
--cc=guro@fb.com \
--cc=hannes@cmpxchg.org \
--cc=linux-api@vger.kernel.org \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=mhocko@suse.com \
--cc=torvalds@linux-foundation.org \
--cc=viro@zeniv.linux.org.uk \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox