On Wed, Jun 24, 2020 at 6:22 AM Mike Snitzer wrote:
>
> On Wed, Jun 24 2020 at 12:54am -0400,
> Damien Le Moal wrote:
>
> > On 2020/06/24 0:23, Mike Snitzer wrote:
> > > On Tue, Jun 23 2020 at 11:07am -0400,
> > > Ignat Korchagin wrote:
> > >
> > >> Do you think it may be better to break it in t
Do you think it may be better to break it in two flags: one for read
path and one for write? So, depending on the needs and workflow these
could be enabled independently?
Regards,
Ignat
On Tue, Jun 23, 2020 at 4:01 PM Mike Snitzer wrote:
>
> On Sun, Jun 21 2020 at 8:45pm -0400,
> Damien Le Moal
On Tue, Jun 23, 2020 at 4:34 PM Mike Snitzer wrote:
>
> On Fri, Jun 19 2020 at 9:23pm -0400,
> 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
On Wed, Jun 24 2020 at 12:54am -0400,
Damien Le Moal wrote:
> On 2020/06/24 0:23, Mike Snitzer wrote:
> > On Tue, Jun 23 2020 at 11:07am -0400,
> > Ignat Korchagin wrote:
> >
> >> Do you think it may be better to break it in two flags: one for read
> >> path and one for write? So, depending on
On 2020/06/24 0:23, Mike Snitzer wrote:
> On Tue, Jun 23 2020 at 11:07am -0400,
> Ignat Korchagin wrote:
>
>> Do you think it may be better to break it in two flags: one for read
>> path and one for write? So, depending on the needs and workflow these
>> could be enabled independently?
>
> If th
On 2020/06/24 0:01, Mike Snitzer wrote:
> On Sun, Jun 21 2020 at 8:45pm -0400,
> Damien Le Moal wrote:
>
>> On 2020/06/20 1:56, Mike Snitzer wrote:
>>> On Fri, Jun 19 2020 at 12:41pm -0400,
>>> Ignat Korchagin wrote:
>>>
This is a follow up from the long-forgotten [1], but with some more
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
On Fri, Jun 19 2020 at 9:23pm -0400,
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 b
On Tue, Jun 23 2020 at 11:07am -0400,
Ignat Korchagin wrote:
> Do you think it may be better to break it in two flags: one for read
> path and one for write? So, depending on the needs and workflow these
> could be enabled independently?
If there is a need to split, then sure. But I think Damie
On Sun, Jun 21 2020 at 8:45pm -0400,
Damien Le Moal wrote:
> On 2020/06/20 1:56, Mike Snitzer wrote:
> > On Fri, Jun 19 2020 at 12:41pm -0400,
> > Ignat Korchagin wrote:
> >
> >> This is a follow up from the long-forgotten [1], but with some more
> >> convincing
> >> evidence. Consider the fo
This is a follow up from the long-forgotten [1], but with some more convincing
evidence. Consider the following script:
#!/bin/bash -e
# create 4G ramdisk
sudo modprobe brd rd_nr=1 rd_size=4194304
# create a dm-crypt device with NULL cipher on top of /dev/ram0
echo '0 8388608 crypt capi:ecb(ciph
On Mon, Jun 22, 2020 at 1:45 AM Damien Le Moal wrote:
>
> On 2020/06/20 1:56, Mike Snitzer wrote:
> > On Fri, Jun 19 2020 at 12:41pm -0400,
> > Ignat Korchagin wrote:
> >
> >> This is a follow up from the long-forgotten [1], but with some more
> >> convincing
> >> evidence. Consider the followin
Yes, it should.
I got one when I was testing the first iteration (without the tasklet)
of the patch on an NVME? disk.
On Sat, Jun 20, 2020 at 8:36 PM Mikulas Patocka wrote:
>
>
>
> On Sat, 20 Jun 2020, Herbert Xu wrote:
>
> > On Fri, Jun 19, 2020 at 02:39:39PM -0400, Mikulas Patocka wrote:
> > >
On Fri, Jun 19, 2020 at 7:39 PM Mikulas Patocka wrote:
>
>
>
> On Fri, 19 Jun 2020, Mike Snitzer wrote:
>
> > On Fri, Jun 19 2020 at 12:41pm -0400,
> > Ignat Korchagin wrote:
> >
> > > This is a follow up from the long-forgotten [1], but with some more
> > > convincing
> > > evidence. Consider t
On 2020/06/22 16:55, Ignat Korchagin wrote:
> On Mon, Jun 22, 2020 at 1:45 AM Damien Le Moal wrote:
>>
>> On 2020/06/20 1:56, Mike Snitzer wrote:
>>> On Fri, Jun 19 2020 at 12:41pm -0400,
>>> Ignat Korchagin wrote:
>>>
This is a follow up from the long-forgotten [1], but with some more
On 2020/06/20 1:56, Mike Snitzer wrote:
> On Fri, Jun 19 2020 at 12:41pm -0400,
> Ignat Korchagin wrote:
>
>> This is a follow up from the long-forgotten [1], but with some more
>> convincing
>> evidence. Consider the following script:
>>
>> #!/bin/bash -e
>>
>> # create 4G ramdisk
>> sudo modpr
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?
>
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
On Fri, 19 Jun 2020, Mike Snitzer wrote:
> On Fri, Jun 19 2020 at 12:41pm -0400,
> Ignat Korchagin wrote:
>
> > This is a follow up from the long-forgotten [1], but with some more
> > convincing
> > evidence. Consider the following script:
> >
> > [1]: https://www.spinics.net/lists/dm-crypt
On Fri, Jun 19 2020 at 12:41pm -0400,
Ignat Korchagin wrote:
> This is a follow up from the long-forgotten [1], but with some more convincing
> evidence. Consider the following script:
>
> #!/bin/bash -e
>
> # create 4G ramdisk
> sudo modprobe brd rd_nr=1 rd_size=4194304
>
> # create a dm-cryp
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