From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx104.postini.com [74.125.245.104]) by kanga.kvack.org (Postfix) with SMTP id F32836B005A for ; Wed, 7 Nov 2012 06:30:17 -0500 (EST) Received: by mail-ea0-f169.google.com with SMTP id k11so706676eaa.14 for ; Wed, 07 Nov 2012 03:30:16 -0800 (PST) MIME-Version: 1.0 In-Reply-To: <20121107105348.GA25549@lizard> References: <20121107105348.GA25549@lizard> Date: Wed, 7 Nov 2012 13:30:16 +0200 Message-ID: Subject: Re: [RFC v3 0/3] vmpressure_fd: Linux VM pressure notifications From: Pekka Enberg Content-Type: text/plain; charset=ISO-8859-1 Sender: owner-linux-mm@kvack.org List-ID: To: Anton Vorontsov Cc: Mel Gorman , Leonid Moiseichuk , KOSAKI Motohiro , Minchan Kim , Bartlomiej Zolnierkiewicz , John Stultz , linux-mm@kvack.org, linux-kernel@vger.kernel.org, linaro-kernel@lists.linaro.org, patches@linaro.org, kernel-team@android.com, linux-man@vger.kernel.org Hi Anton, On Wed, Nov 7, 2012 at 12:53 PM, Anton Vorontsov wrote: > This is the third RFC. As suggested by Minchan Kim, the API is much > simplified now (comparing to vmevent_fd): > > - As well as Minchan, KOSAKI Motohiro didn't like the timers, so the > timers are gone now; > - Pekka Enberg didn't like the complex attributes matching code, and > so it is no longer there; > - Nobody liked the raw vmstat attributes, and so they were eliminated > too. I love the API and implementation simplifications but I hate the new ABI. It's a specialized, single-purpose syscall and bunch of procfs tunables and I don't see how it's 'extensible' to anything but VM If people object to vmevent_fd() system call, we should consider using something more generic like perf_event_open() instead of inventing our own special purpose ABI. Pekka -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org