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From: "J. R. Okajima" <hooanon05@yahoo.co.jp>
Subject: Re: proc_dointvec() and write
To: Cong Wang <amwang@redhat.com>
Cc: opurdila@ixiacom.com, davem@davemloft.net, linux-kernel@vger.kernel.org
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References: <306.1274711539@jrobl> <4BFB56F1.1080200@redhat.com>
Date: Tue, 25 May 2010 13:57:40 +0900
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Cong Wang:
> Hmm, odd, I tested other proc files, I see no problem.
> I am wondering why /proc/sys/kernel/printk is special here.

The condition is,
- the entry has multiple values, .maxlen = N * sizeof(foo)
- the entry is writable, .mode = 0644 (or something)

In sysctl.c, only "printk" and "acct" match.


J. R. Okajima