Re: [PATCH 1/2] btrfs: tree-checker: Make write time tree checker verify the content of leaves

[Qu Wenruo <wqu@suse.de>]

[-- Attachment #1.1: Type: text/plain, Size: 989 bytes --]



On 2019/4/3 下午10:13, David Sterba wrote:
> On Wed, Apr 03, 2019 at 07:59:18PM +0800, Qu Wenruo wrote:
>> Commit "btrfs: Do mandatory tree block check before submitting bio" is
>> designed to check leaves contents, just as read time check.
>>
>> However due to the confusing parameter list, "false" is passed to where
>> it is supposed to be "true".
> 
> And this seems to invalidate all testing since false->true will do
> additional expensive checks.

That's the case.

However with the next patch, btrfs_check_leaf_full() is less expensive.
Just 3~5 times expensive as csum_tree_block(), reduced from 20 times.

My full fstests run is coming to the end and so far no regression.

> I thought I'd fold the fix to the original
> patch but in this case it'd be the wrong thing to do due to the visible
> effects of the change.

If that's the case, I'd add new Fixes: tag, but that can only happen
after write time patch get merged upstream.

Thanks,
Qu


[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 488 bytes --]