From: Marcelo Tosatti <marcelo@conectiva.com.br>
To: Linus Torvalds <torvalds@transmeta.com>
Cc: linux-kernel@vger.kernel.org
Subject: bdflush synchronous IO on prerelease-diff
Date: Wed, 3 Jan 2001 22:50:00 -0200 (BRST) [thread overview]
Message-ID: <Pine.LNX.4.21.0101032241500.839-100000@freak.distro.conectiva> (raw)
Hi Linus,
I've noticed you changed bdflush to do synchronous IO on page_launder().
That seems to be a performance problem, since kflushd will have to wait
for dirty buffers to get synced instead looping on the inactive dirty
list more often.
Here is a patch to change this.
--- linux.orig/fs/buffer.c Wed Jan 3 22:43:24 2001
+++ linux/fs/buffer.c Thu Jan 4 00:28:50 2001
@@ -2710,7 +2710,7 @@
flushed = flush_dirty_buffers(0);
if (free_shortage())
- flushed += page_launder(GFP_KERNEL, 1);
+ flushed += page_launder(GFP_KERNEL, 0);
/*
* If there are still a lot of dirty buffers around,
-
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next reply other threads:[~2001-01-04 2:42 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-01-04 0:50 Marcelo Tosatti [this message]
2001-01-04 2:38 ` bdflush synchronous IO on prerelease-diff Marcelo Tosatti
2001-01-04 4:51 ` Linus Torvalds
2001-01-04 5:23 ` try_to_swap_out() return value problem? Marcelo Tosatti
2001-01-04 7:42 ` Linus Torvalds
2001-01-04 16:14 ` Rik van Riel
2001-01-04 16:24 ` Linus Torvalds
2001-01-04 16:34 ` Rik van Riel
2001-01-04 16:43 ` Linus Torvalds
2001-01-04 14:32 ` Rik van Riel
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