Re: [PATCH] umount versus iprune

[Andrew Morton]

Hugh Dickins <[e-mail]> 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?