mbox series

[v5,0/5] Lazy flush for the auth session

Message ID 20240921120811.1264985-1-jarkko@kernel.org (mailing list archive)
Headers show
Series Lazy flush for the auth session | expand

Message

Jarkko Sakkinen Sept. 21, 2024, 12:08 p.m. UTC
This patch set aims to fix:
https://bugzilla.kernel.org/show_bug.cgi?id=219229.

The baseline for the series is the v6.11 tag.

v4:
https://lore.kernel.org/linux-integrity/20240918203559.192605-1-jarkko@kernel.org/
v3:
https://lore.kernel.org/linux-integrity/20240917154444.702370-1-jarkko@kernel.org/
v2:
https://lore.kernel.org/linux-integrity/20240916110714.1396407-1-jarkko@kernel.org/
v1:
https://lore.kernel.org/linux-integrity/20240915180448.2030115-1-jarkko@kernel.org/

Jarkko Sakkinen (5):
  tpm: Return on tpm2_create_null_primary() failure
  tpm: Implement tpm2_load_null() rollback
  tpm: flush the null key only when /dev/tpm0 is accessed
  tpm: Allocate chip->auth in tpm2_start_auth_session()
  tpm: flush the auth session only when /dev/tpm0 is open

 drivers/char/tpm/tpm-chip.c       |  14 ++++
 drivers/char/tpm/tpm-dev-common.c |   8 +++
 drivers/char/tpm/tpm-interface.c  |  10 ++-
 drivers/char/tpm/tpm2-cmd.c       |   3 +
 drivers/char/tpm/tpm2-sessions.c  | 109 ++++++++++++++++++------------
 include/linux/tpm.h               |   2 +
 6 files changed, 102 insertions(+), 44 deletions(-)

Comments

Paul Menzel Sept. 21, 2024, 12:36 p.m. UTC | #1
Dear Jarkko,


Thank you for working on this and your patches.

Am 21.09.24 um 14:08 schrieb Jarkko Sakkinen:
> This patch set aims to fix:
> https://bugzilla.kernel.org/show_bug.cgi?id=219229.

If I am not mistaken this is about reducing the boot time, right? It’d 
be great if you documented the numbers in the commit messages.


Kind regards,

Paul
Jarkko Sakkinen Sept. 21, 2024, 1:13 p.m. UTC | #2
On Sat Sep 21, 2024 at 3:36 PM EEST, Paul Menzel wrote:
> Dear Jarkko,
>
>
> Thank you for working on this and your patches.
>
> Am 21.09.24 um 14:08 schrieb Jarkko Sakkinen:
> > This patch set aims to fix:
> > https://bugzilla.kernel.org/show_bug.cgi?id=219229.
>
> If I am not mistaken this is about reducing the boot time, right? It’d 
> be great if you documented the numbers in the commit messages.

So what you're asking is already documented by:

1. https://bugzilla.kernel.org/show_bug.cgi?id=219229
2. Tested-by

I added lore link to the bugzilla bug, in order to address your comment.

I don't think my "QEMU numbers" will bring any value here tbh.

BR, Jarkko
Jarkko Sakkinen Sept. 21, 2024, 2:38 p.m. UTC | #3
On Sat Sep 21, 2024 at 4:13 PM EEST, Jarkko Sakkinen wrote:
> On Sat Sep 21, 2024 at 3:36 PM EEST, Paul Menzel wrote:
> > Dear Jarkko,
> >
> >
> > Thank you for working on this and your patches.
> >
> > Am 21.09.24 um 14:08 schrieb Jarkko Sakkinen:
> > > This patch set aims to fix:
> > > https://bugzilla.kernel.org/show_bug.cgi?id=219229.
> >
> > If I am not mistaken this is about reducing the boot time, right? It’d 
> > be great if you documented the numbers in the commit messages.
>
> So what you're asking is already documented by:
>
> 1. https://bugzilla.kernel.org/show_bug.cgi?id=219229
> 2. Tested-by
>
> I added lore link to the bugzilla bug, in order to address your comment.

... to the email which contains the figures.

20 s -> 8.7 s

BR, Jarkko
Jarkko Sakkinen Sept. 22, 2024, 5:51 p.m. UTC | #4
On Sat Sep 21, 2024 at 3:08 PM EEST, Jarkko Sakkinen wrote:
> This patch set aims to fix:
> https://bugzilla.kernel.org/show_bug.cgi?id=219229.
>
> The baseline for the series is the v6.11 tag.
>
> v4:
> https://lore.kernel.org/linux-integrity/20240918203559.192605-1-jarkko@kernel.org/
> v3:
> https://lore.kernel.org/linux-integrity/20240917154444.702370-1-jarkko@kernel.org/
> v2:
> https://lore.kernel.org/linux-integrity/20240916110714.1396407-1-jarkko@kernel.org/
> v1:
> https://lore.kernel.org/linux-integrity/20240915180448.2030115-1-jarkko@kernel.org/
>
> Jarkko Sakkinen (5):
>   tpm: Return on tpm2_create_null_primary() failure
>   tpm: Implement tpm2_load_null() rollback
>   tpm: flush the null key only when /dev/tpm0 is accessed
>   tpm: Allocate chip->auth in tpm2_start_auth_session()
>   tpm: flush the auth session only when /dev/tpm0 is open
>
>  drivers/char/tpm/tpm-chip.c       |  14 ++++
>  drivers/char/tpm/tpm-dev-common.c |   8 +++
>  drivers/char/tpm/tpm-interface.c  |  10 ++-
>  drivers/char/tpm/tpm2-cmd.c       |   3 +
>  drivers/char/tpm/tpm2-sessions.c  | 109 ++++++++++++++++++------------
>  include/linux/tpm.h               |   2 +
>  6 files changed, 102 insertions(+), 44 deletions(-)


Roberto, James, speaking of digest cache. This patch set has no aim to
fix those issues but I do believe that it should improve also that 
feature.

If I don't get soon patch reviews for the patch set, I'll pick the 2nd
best option: disable bus encryption on all architectures including x86
and ARM64 (being by default on).

It's a force majeure situation. I know this would sort out the issue
but I really cannot send these as a pull request with zero reviewe-by's.

I expect this to be closed by tomorrow.

BR, Jarkko