Re: [RFC PATCH 0/1] dm-crypt excessive overhead
Herbert Xu <[email protected]>
| Newsgroups | gmane.linux.kernel,gmane.linux.kernel.device-mapper.devel,gmane.linux.kernel.device-mapper.dm-crypt |
|---|---|
| Message-ID | <[email protected]> |
On Tue, Jun 23, 2020 at 05:24:39PM +0100, Ignat Korchagin wrote: > > I may be misunderstanding the terminology, but tasklets execute in > soft IRQ, don't they? What we care about is to execute the decryption > as fast as possible, but we can't do it in a hard IRQ context (that > is, the interrupt context where other interrupts are disabled). As far > as I understand, tasklets are executed right after the hard IRQ > context, but with interrupts enabled - which is the first safe-ish > place to do more lengthy processing without the risk of missing an > interrupt. Yes you are absolutely right. In general high-performance work should be carried out in softirq context. That's how the networking stack works for example. Cheers, -- Email: Herbert Xu <[email protected]> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt