Re: KCSAN in fuse (fuse_request_end <-> fuse_request_end)

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On Fri, 26 Apr 2024 at 18:18, Breno Leitao <leitao@xxxxxxxxxx> wrote:

> fuse_request_end() reads and writes to ->num_background while holding
> the bg_lock, but fuse_readahead() does not hold any lock before reading
> ->num_background.  That is what KCSAN seems to be complaining about.
> Should we get ->bg_lock before reading ->num_background?

Probably not necessary.  Does wrapping that access in READ_ONCE() fix
the complaint?


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