linux-kernel - Re: [PATCH RFC v2 0/7] epoll: Introduce new syscalls, epoll_ctl_batch and epoll

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Message-ID: <20150204105037.GA3374@ad.nay.redhat.com>
Date:	Wed, 4 Feb 2015 18:50:37 +0800
From:	Fam Zheng <famz@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
	Alexander Viro <viro@...iv.linux.org.uk>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Kees Cook <keescook@...omium.org>,
	Andy Lutomirski <luto@...capital.net>,
	David Herrmann <dh.herrmann@...il.com>,
	Alexei Starovoitov <ast@...mgrid.com>,
	Miklos Szeredi <mszeredi@...e.cz>,
	David Drysdale <drysdale@...gle.com>,
	Oleg Nesterov <oleg@...hat.com>,
	"David S. Miller" <davem@...emloft.net>,
	Vivek Goyal <vgoyal@...hat.com>,
	Mike Frysinger <vapier@...too.org>,
	"Theodore Ts'o" <tytso@....edu>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	Rasmus Villemoes <linux@...musvillemoes.dk>,
	Rashika Kheria <rashika.kheria@...il.com>,
	Hugh Dickins <hughd@...gle.com>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	Peter Zijlstra <peterz@...radead.org>,
	linux-fsdevel@...r.kernel.org, linux-api@...r.kernel.org,
	Josh Triplett <josh@...htriplett.org>,
	"Michael Kerrisk (man-pages)" <mtk.manpages@...il.com>,
	Paolo Bonzini <pbonzini@...hat.com>,
	Omar Sandoval <osandov@...ndov.com>
Subject: Re: [PATCH RFC v2 0/7] epoll: Introduce new syscalls,
 epoll_ctl_batch and epoll_pwait1

On Wed, 02/04 18:36, Fam Zheng wrote:
> 
>        Not that this call isn't atomic in terms of updating the epoll

s/Not/Note/

>        descriptor, which means a second epoll_ctl or epoll_ctl_batch call
>        during the first epoll_ctl_batch may make the operation sequence
>        interleaved. However, each single epoll_ctl_cmd operation has the same
>        semantics as a epoll_ctl call.
> 

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