linux-kernel - Re: [PATCH] btrfs: correct the assert for subpage case

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Message-ID: <20250512175353.GA3472716@zen.localdomain>
Date: Mon, 12 May 2025 10:53:53 -0700
From: Boris Burkov <boris@....io>
To: Daniel Vacek <neelx@...e.com>
Cc: Chris Mason <clm@...com>, Josef Bacik <josef@...icpanda.com>,
	David Sterba <dsterba@...e.com>, linux-btrfs@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] btrfs: correct the assert for subpage case

On Mon, May 12, 2025 at 03:28:50PM +0200, Daniel Vacek wrote:
> The assert is only true in !subpage case. We can either fix it this way
> or completely remove it.
> 
> This fixes and should be folded into:
> 	btrfs: fix broken drop_caches on extent buffer folios
> 
> Signed-off-by: Daniel Vacek <neelx@...e.com>

I would lean towards removing it, personally. But LGTM, thanks.

Reviewed-by: Boris Burkov <boris@....io>

> ---
>  fs/btrfs/extent_io.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
> index 80a8563a25add..3b3f73894ffe2 100644
> --- a/fs/btrfs/extent_io.c
> +++ b/fs/btrfs/extent_io.c
> @@ -3411,7 +3411,7 @@ struct extent_buffer *alloc_extent_buffer(struct btrfs_fs_info *fs_info,
>  			continue;
>  		}
>  
> -		ASSERT(!folio_test_private(folio));
> +		ASSERT(!btrfs_meta_is_subpage(fs_info) && !folio_test_private(folio));
>  		folio_put(folio);
>  		eb->folios[i] = NULL;
>  	}
> -- 
> 2.47.2
>