Re: [PATCH 5/6] xfs_scrub: make phase 4 go straight to fstrim if nothing to fix

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On 5/12/22 6:12 PM, Darrick J. Wong wrote:
> On Thu, May 12, 2022 at 05:34:37PM -0500, Eric Sandeen wrote:
>> On 5/5/22 11:08 AM, Darrick J. Wong wrote:
>>> From: Darrick J. Wong <djwong@xxxxxxxxxx>
>>>
>>> If there's nothing to repair in phase 4, there's no need to hold up the
>>> FITRIM call to do the summary count scan that prepares us to repair
>>> filesystem metadata.  Rearrange this a bit.
>>>
>>> Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx>
>>
>>
>>> +
>>> +	/*
>>> +	 * If errors remain on the filesystem, do not trim anything.  We don't
>>> +	 * have any threads running, so it's ok to skip the ctx lock here.
>>> +	 */
>>> +	if (ctx->corruptions_found || ctx->unfixable_errors == 0)
>>> +		return 0;
>>> +
>>> +maybe_trim:
>>> +	trim_filesystem(ctx);
>>> +	return 0;
>>>  }
>>
>> I'm a little confused by the unfixable_errors test, is that correct?
>>
>> Why do you bail out if there are 0 unfixable errors?
> 
> Oooops.  That was a logic inversion bug. :(

I'll fix it up and commit it with:

+	if (ctx->corruptions_found || ctx->unfixable_errors != 0)
+		return 0;

if you want to confirm that's correct?

-Eric



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