linux-kernel - Re: [GIT PULL] Btrfs fixes for 5.19-rc7

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Message-ID: <YtLadOkHl0lDNwbM@casper.infradead.org>
Date:   Sat, 16 Jul 2022 16:34:12 +0100
From:   Matthew Wilcox <willy@...radead.org>
To:     David Sterba <dsterba@...e.com>, torvalds@...ux-foundation.org,
        linux-btrfs@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [GIT PULL] Btrfs fixes for 5.19-rc7

On Sat, Jul 16, 2022 at 04:06:20PM +0200, David Sterba wrote:
> Note about the xarray API:
> 
> The possible sleeping is documented next to xa_insert, however there's
> no runtime check for that, like is eg. in radix_tree_preload.  The
> context does not need to be atomic so it's not as simple as
> 
>   might_sleep_if(gfpflags_allow_blocking(gfp));
> 
> or
> 
>   WARN_ON_ONCE(gfpflags_allow_blocking(gfp));
> 
> Some kind of development time debugging/assertion aid would be nice.

Are you saying that
https://git.infradead.org/users/willy/xarray.git/commitdiff/c195d497ca1ff673c2e6935152a0a5b6be2efdc9

is wrong?  It's been in linux-next for the last week since you drew it
to my attention that this would be useful.