[igt-dev] [PATCH i-g-t] i915/gem_exec_big: Only warn for the first sign of a pagefault

[Tvrtko Ursulin]

On 28/03/2019 11:49, Chris Wilson wrote:
> We only need the warning once, not for the several thousand relocations
> we try. The current execbuf implementation will set all presumed_offset
> to -1 so this loop should quit on the first entry if we hit the
> pagefault, but for the sake of completeness check all.
> 
> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=110269
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
> ---
>   tests/i915/gem_exec_big.c | 6 ++++--
>   1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/tests/i915/gem_exec_big.c b/tests/i915/gem_exec_big.c
> index 440136ee8..9da90ead6 100644
> --- a/tests/i915/gem_exec_big.c
> +++ b/tests/i915/gem_exec_big.c
> @@ -169,8 +169,10 @@ static void execN(int fd, uint32_t handle, uint64_t batch_size, unsigned flags,
>   	igt_permute_array(gem_reloc, nreloc, xchg_reloc);
>   
>   	gem_execbuf(fd, &execbuf);
> -	for (n = 0; n < nreloc; n++)
> -		igt_warn_on(gem_reloc[n].presumed_offset == -1);
> +	for (n = 0; n < nreloc; n++) {
> +		if (igt_warn_on(gem_reloc[n].presumed_offset == -1))
> +			break;
> +	}
>   
>   	if (use_64bit_relocs) {
>   		for (n = 0; n < nreloc; n++) {
> 

Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>

Regards,

Tvrtko