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SubjectRe: [PATCH] umount versus iprune
Hugh Dickins <hugh@veritas.com> wrote:
>
> When prune_icache coincides with unmounting, invalidate_inodes notices
> the inode it's working on as busy but doesn't wait: Self-destruct in 5
> seconds message, and later iput oopses on freed super_block.
>
> Neither end is a fast path, so patch below just adds iprune_sem for
> exclusion: if you've got a neater solution, great - I shied away from
> games with i_state, and extending use of shrinker_sem felt like abuse.
>

Sounds reasonable. The semaphore will block kswapd, but the reason kswapd
is being blocked is so that someone else can free tons of memory, so shrug.

Is 2.4 affected?


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