Re: Fall back io scheduler for 2.6.15?

[Tejun Heo <htejun@gmail.com>]

Jens Axboe wrote:
> On Sat, Jan 14 2006, Chuck Ebbert wrote:
> 
>>In-Reply-To: <20060113174914.7907bf2c.akpm@osdl.org>
>>
>>On Fri, 13 Jan 2006, Andrew Morton wrote:
>>
>>
>>>OK.  And I assume that AS wasn't compiled, so that's why it fell back?
>>
>>As of 2.6.15 you need to use "anticipatory" instead of "as".
>>
>>Maybe this patch would help?
>>
>>Signed-off-by: Chuck Ebbert <76306.1226@compuserve.com>
>>
>>--- 2.6.15a.orig/block/elevator.c
>>+++ 2.6.15a/block/elevator.c
>>@@ -150,6 +150,13 @@ static void elevator_setup_default(void)
>> 	if (!chosen_elevator[0])
>> 		strcpy(chosen_elevator, CONFIG_DEFAULT_IOSCHED);
>> 
>>+	/*
>>+	 * Be backwards-compatible with previous kernels, so users
>>+	 * won't get the wrong elevator.
>>+	 */
>>+	if (!strcmp(chosen_elevator, "as"))
>>+		strcpy(chosen_elevator, "anticipatory");
>>+
>>  	/*
>>  	 * If the given scheduler is not available, fall back to no-op.
>>  	 */
> 
> 
> We probably should apply this, since it used to be 'as'.
> 

Just out of curiousity, why did 'as' get renamed to 'anticipatory'?

-- 
tejun