From: Andrew Morton <akpm@osdl.org>
To: Paul Jackson <pj@sgi.com>
Cc: taka@valinux.co.jp, Simon.Derr@bull.net,
linux-kernel@vger.kernel.org, clameter@sgi.com,
torvalds@osdl.org, linux-mm@kvack.org
Subject: Re: [PATCH] cpuset confine pdflush to its cpuset
Date: Sun, 23 Oct 2005 23:40:32 -0700 [thread overview]
Message-ID: <20051023234032.5e926336.akpm@osdl.org> (raw)
In-Reply-To: <20051023233237.0982b54b.pj@sgi.com>
Paul Jackson <pj@sgi.com> wrote:
>
> Takahashi-san wrote:
> > I realized CPUSETS has another problem around pdflush.
>
> Excellent observation. I had not realized this.
>
> Thank-you for pointing it out.
>
> I don't have plans. Do you have any suggestions?
Per-zone dirty thresholds (quite messy), per-zone writeback (horrific,
linear searches or data structure proliferation everywhere).
Let's see a (serious) worload/testcase first, hey? vmscan.c writeback off
the LRU is a bit slow, but we should be able to make it suffice.
> ( Anyone know what the "pd" stands for in pdflush ?? )
"page dirty"? It's what bdflush became when writeback went from
being block-based to being page-based.
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next prev parent reply other threads:[~2005-10-24 6:40 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20051024001913.7030.71597.sendpatchset@jackhammer.engr.sgi.com>
2005-10-24 5:52 ` Hirokazu Takahashi
2005-10-24 6:32 ` Paul Jackson
2005-10-24 6:40 ` Andrew Morton [this message]
2005-10-24 6:49 ` Paul Jackson
2005-10-24 7:13 ` Hirokazu Takahashi
2005-10-24 7:37 ` Paul Jackson
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