Re: [PATCH v2] PCI: vmd: Add indirection layer to vmd irq lists

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



[resent with Jonathan's current address]

On Thu, Oct 31, 2019 at 07:08:53AM -0600, Jon Derrick wrote:
> With CONFIG_MAXSMP and CONFIG_PROVE_LOCKING, the size of an srcu_struct can
> grow quite large. In one compilation instance it produced a 74KiB data
> structure. These are embedded in the vmd_irq_list struct, and a N=64 allocation
> can exceed MAX_ORDER, violating reclaim rules.
[snip]
> ---
> Added Paul to make him aware of srcu_struct size with these options
> 
> v1->v2:
> Squashed the revert into this commit
> changed n=1 kcalloc to kzalloc
> 
>  drivers/pci/controller/vmd.c | 47 ++++++++++++++++++++++----------------------
>  1 file changed, 24 insertions(+), 23 deletions(-)

Has there been any progress on this?  We're seeing a similar problem
in a PREEMPT_RT kernel with MAXSMP.

-Scott




[Index of Archives]     [DMA Engine]     [Linux Coverity]     [Linux USB]     [Video for Linux]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]     [Greybus]

  Powered by Linux