We seem to be missing some W/A for 2M pages and are getting a hit on raw read bandwidths (even 30%) even though the write bandwidths improve (even 10%).
For now, disable THP, which is our only practical source of 2M pages until we have a W/A for the issue. Reported-by: Valtteri Rantala <[email protected]> Fixes: b901bb89324a ("drm/i915/gemfs: enable THP") Signed-off-by: Joonas Lahtinen <[email protected]> Cc: Matthew Auld <[email protected]> Cc: Chris Wilson <[email protected]> Cc: Jani Nikula <[email protected]> Cc: Rodrigo Vivi <[email protected]> Cc: Valtteri Rantala <[email protected]> Cc: Eero Tamminen <[email protected]> --- drivers/gpu/drm/i915/i915_gemfs.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/i915_gemfs.c b/drivers/gpu/drm/i915/i915_gemfs.c index e2993857df37..851d827d83a8 100644 --- a/drivers/gpu/drm/i915/i915_gemfs.c +++ b/drivers/gpu/drm/i915/i915_gemfs.c @@ -52,7 +52,8 @@ int i915_gemfs_init(struct drm_i915_private *i915) if (has_transparent_hugepage()) { struct super_block *sb = gemfs->mnt_sb; - char options[] = "huge=within_size"; + /* FIXME: Disabled until we get W/A for read BW issue. */ + char options[] = "huge=deny"; int flags = 0; int err; -- 2.13.6 _______________________________________________ Intel-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/intel-gfx
