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SubjectRe: [PATCH] xen-blkback: prevent premature module unload
On 10.12.19 15:53, Paul Durrant wrote:
> Objects allocated by xen_blkif_alloc come from the 'blkif_cache' kmem
> cache. This cache is destoyed when xen-blkif is unloaded so it is
> necessary to wait for the deferred free routine used for such objects to
> complete. This necessity was missed in commit 14855954f636 "xen-blkback:
> allow module to be cleanly unloaded". This patch fixes the problem by
> taking/releasing extra module references in xen_blkif_alloc/free()
> respectively.
> Signed-off-by: Paul Durrant <>

Pushed to xen/tip.git for-linus-5.5b


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