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[dm-devel] Re: [dm-crypt] INFO: task mount:11202 blocked for more than 120 seconds



On Monday 17 March 2008 18:36:09 Alasdair G Kergon wrote:
> Latest version for everyone to try:
>
> From: Milan Broz <mbroz redhat com>
>
> Fix regression in dm-crypt introduced in commit
> 3a7f6c990ad04e6f576a159876c602d14d6f7fef
> (dm crypt: use async crypto).
>
> If write requests need to be split into pieces, the code must not
> process them in parallel because the crypto context cannot be shared.
> So there can be parallel crypto operations on one part of the write,
> but only one write bio can be processed at a time.
>
> This is not optimal and the workqueue code need to be optimized for
> parallel processing, but for now it solves problem without affecting
> the performance of synchronous crypto operation (most of current
> dm-crypt users).
>
> Signed-off-by: Milan Broz <mbroz redhat com>
> Signed-off-by: Alasdair G Kergon <agk redhat com>
Tested-by: Christian Lamparter <chunkeey web de>

Well, the dm-crypt regressions seems to be gone. :)
Thanks for your work & time!

Regards, 
	Christian


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