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Date: Wed, 2 May 2007 01:26:47 -0700 From: Paul Jackson <pj@....com> To: David Rientjes <rientjes@...gle.com> Cc: torvalds@...ux-foundation.org, menage@...gle.com, clameter@...ulhu.engr.sgi.com, linux-kernel@...r.kernel.org Subject: Re: [patch] cpusets: allow empty {cpus,mems}_allowed to be set for unpopulated cpuset Other than the detail of allowing a newline from doing: echo > cpus to work, I'm ok with this patch. It passes my cpuset_test, and seems to allow unpopulating cpusets, as advertised. Aha - as I was writing this, I noticed that the command: echo -n '' > cpus does -not- work! The echo command recognizes that as a write of zero non-null bytes, and skips the write altogether. We have to add the code to handle an input line consisting of just a bare newline, to mean an empty mask. Well, we don't -have- to. But writing a single nul byte in shell script will challenge most shell script hackers. -- I won't rest till it's the best ... Programmer, Linux Scalability Paul Jackson <pj@....com> 1.925.600.0401 - 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/
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