Messages in this thread | | | Date | Sat, 20 Jun 2020 15:36:21 -0400 (EDT) | From | Mikulas Patocka <> | Subject | Re: [RFC PATCH 0/1] dm-crypt excessive overhead |
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On Sat, 20 Jun 2020, Herbert Xu wrote:
> On Fri, Jun 19, 2020 at 02:39:39PM -0400, Mikulas Patocka wrote: > > > > I'm looking at this and I'd like to know why does the crypto API fail in > > hard-irq context and why does it work in tasklet context. What's the exact > > reason behind this? > > You're not supposed to do any real work in IRQ handlers. All > the substantial work should be postponed to softirq context.
I see.
BTW - should it also warn if it is running in a process context with interrupts disabled?
Mikulas
> Why do you need to do work in hard IRQ context? > > Cheers, > -- > Email: Herbert Xu <herbert@gondor.apana.org.au> > Home Page: http://gondor.apana.org.au/~herbert/ > PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt >
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