linux-kernel - Re: [PATCH 0/5] Some vmevent fixes...

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAOJsxLGHDF_QnRSA_CckdTDGxNkOFvRNZoFoW0iGDjGvTCK=2A@mail.gmail.com>
Date:	Fri, 8 Jun 2012 09:54:15 +0300
From:	Pekka Enberg <penberg@...nel.org>
To:	KOSAKI Motohiro <kosaki.motohiro@...il.com>
Cc:	Anton Vorontsov <cbouatmailru@...il.com>,
	Minchan Kim <minchan@...nel.org>,
	Leonid Moiseichuk <leonid.moiseichuk@...ia.com>,
	John Stultz <john.stultz@...aro.org>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, linaro-kernel@...ts.linaro.org,
	patches@...aro.org, kernel-team@...roid.com
Subject: Re: [PATCH 0/5] Some vmevent fixes...

On Fri, Jun 8, 2012 at 6:55 AM, KOSAKI Motohiro
<kosaki.motohiro@...il.com> wrote:
>> For some cases, yes, but probably not for all.
>>
>> For example, if userspace doesn't know about "about to swap real soon"
>> condition, it can continue to grow its caches making
>> fallocate(VOLATILE) pretty much useless.
>
> Fair enough. But, Please consider your scenario don't need vmevent(2),
> cat /proc/meminfo works enough. Only dropping activity need a quick work
> and just in time notification. cache growing limitation don't need.

Why do you keep bringing this up? Yes, you might get away with polling
/proc/meminfo or /proc/vmstat for some specific cases. It does not
make it a proper generic solution to the problem "vmevent" ABI tries
to address.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/