From: Andi Kleen <ak@suse.de>
To: Andrea Arcangeli <andrea@suse.de>
Cc: "Stephen C. Tweedie" <sct@redhat.com>,
Linus Torvalds <torvalds@transmeta.com>,
linux-kernel@vger.kernel.org
Subject: Re: 2 times faster rawio and several fixes (2.4.3aa3)
Date: Fri, 6 Apr 2001 19:02:32 +0200 [thread overview]
Message-ID: <20010406190232.A20258@gruyere.muc.suse.de> (raw)
In-Reply-To: <20010406183440.B28118@athlon.random> <20010406190701.H28118@athlon.random>
In-Reply-To: <20010406190701.H28118@athlon.random>; from andrea@suse.de on Fri, Apr 06, 2001 at 07:07:01PM +0200
On Fri, Apr 06, 2001 at 07:07:01PM +0200, Andrea Arcangeli wrote:
> However we can probably stay with the 512k atomic I/O otherwise the iobuf
> structure will grow again of an order of 2. With 512k of atomic I/O the kiovec
> structure is just 8756 in size (infact probably I should allocate some of the
> structures dynamically instead of statics inside the kiobuf.. as it is now
> with my patch it's not very reliable as it needs an allocation of order 2).
8756bytes wastes most of an order 2 allocation. Wouldn't it make more sense to
round it up to 16k to use the four pages fully ? (if the increased atomic
size doesn't have other bad effects -- i guess it's no problem anymore to
lock down that much memory?)
-Andi
next prev parent reply other threads:[~2001-04-06 17:03 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-04-06 16:34 Andrea Arcangeli
2001-04-06 17:07 ` Andrea Arcangeli
2001-04-06 17:02 ` Andi Kleen [this message]
2001-04-06 17:36 ` Andrea Arcangeli
2001-04-06 18:22 ` Andrea Arcangeli
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