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From: Eric Dumazet <dada1@cosmosbay.com>
To: Matt Mackall <mpm@selenic.com>
Cc: linux-kernel <linux-kernel@vger.kernel.org>
Subject: [PATCH] random : prefetch the whole pool, not 1/4 of it
Date: Fri, 29 Jul 2005 00:26:11 +0200	[thread overview]
Message-ID: <42E95B83.8070006@cosmosbay.com> (raw)
In-Reply-To: <20050407212058.GU3174@waste.org>

[-- Attachment #1: Type: text/plain, Size: 221 bytes --]

Hi Matt

Could you check this patch and apply it ?

Thank you

Eric

[RANDOM] : prefetch the whole pool, not 1/4 of it,
            (pool contains u32 words, not bytes)

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>


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[-- Type: text/plain, Size: 375 bytes --]

--- linux-2.6.13-rc3/drivers/char/random.c	2005-07-13 06:46:46.000000000 +0200
+++ linux-2.6.13-rc3-ed/drivers/char/random.c	2005-07-29 00:11:24.000000000 +0200
@@ -469,7 +469,7 @@
 	next_w = *in++;
 
 	spin_lock_irqsave(&r->lock, flags);
-	prefetch_range(r->pool, wordmask);
+	prefetch_range(r->pool, wordmask*4);
 	input_rotate = r->input_rotate;
 	add_ptr = r->add_ptr;
 

  reply	other threads:[~2005-07-28 22:30 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-04-07 21:20 [PATCH] update maintainer for /dev/random Matt Mackall
2005-07-28 22:26 ` Eric Dumazet [this message]
2005-07-28 22:31   ` [PATCH] random : prefetch the whole pool, not 1/4 of it Matt Mackall
2005-07-30 21:32   ` Folkert van Heusden

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