linux-kernel - Re: EMFILE/ENFILE mitigation needed in erofs?

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Message-ID: <1484181.1650563860@warthog.procyon.org.uk>
Date:   Thu, 21 Apr 2022 18:57:40 +0100
From:   David Howells <dhowells@...hat.com>
To:     JeffleXu <jefflexu@...ux.alibaba.com>
Cc:     dhowells@...hat.com, linux-cachefs@...hat.com, xiang@...nel.org,
        chao@...nel.org, linux-erofs@...ts.ozlabs.org,
        torvalds@...ux-foundation.org, gregkh@...uxfoundation.org,
        willy@...radead.org, linux-fsdevel@...r.kernel.org,
        joseph.qi@...ux.alibaba.com, bo.liu@...ux.alibaba.com,
        tao.peng@...ux.alibaba.com, gerry@...ux.alibaba.com,
        eguan@...ux.alibaba.com, linux-kernel@...r.kernel.org,
        luodaowen.backend@...edance.com, tianzichen@...ishou.com,
        fannaihao@...du.com, zhangjiachen.jaycee@...edance.com
Subject: Re: EMFILE/ENFILE mitigation needed in erofs?

JeffleXu <jefflexu@...ux.alibaba.com> wrote:

> 2. Our user daemon will configure rlimit-nofile to a reasonably large
> (e.g. 1 million) value, so that it won't fail when trying to allocate fds.

There's a system-wide limit also; simply increasing the rlimit won't override
that.

David