Re: [PATCH] mm: Avoid swapping in interrupt context

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On Mon 01-10-18 15:15:15, Ashish Mhetre wrote:
> From: Sri Krishna chowdary <schowdary@xxxxxxxxxx>
> 
> Pages can be swapped out from interrupt context as well.

How? No allocation request from the interrupt context can use a
sleepable allocation context and that means that no reclaim is allowed
from the IRQ context.

> ZRAM uses zsmalloc allocator to make room for these pages.
> But zsmalloc is not made to be used from interrupt context.
> This can result in a kernel Oops.

Could you provide the Oops message?
-- 
Michal Hocko
SUSE Labs




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