yes, flush page twice cause system slow in some CPU.
Meanwhile, set_memory_uc/wc doesn't only do flush page cache, but also
change page table attribute, so your solution seems to have some problem.
2012/3/20 Konrad Rzeszutek Wilk
> On Tue, Mar 20, 2012 at 10:15:02AM +0800, Scott Fa
yes, flush page twice cause system slow in some CPU.
Meanwhile, set_memory_uc/wc doesn't only do flush page cache, but also
change page table attribute, so your solution seems to have some problem.
2012/3/20 Konrad Rzeszutek Wilk
> On Tue, Mar 20, 2012 at 10:15:02AM +0800, Scott Fa
1);
only do flush cache when high memory and leave the linear memory flush in
function set_memory_uc/wc?
2012/3/20 Jerome Glisse
> On Mon, 2012-03-19 at 23:11 +0800, Scott Fang wrote:
> > In function ttm_tt_set_caching
> > ,,,
> >
> > if (ttm->caching_state
typo error. abundant=>redundant
2012/3/19 Scott Fang
> In function ttm_tt_set_caching
> ,,,
>
> if (ttm->caching_state == tt_cached)
> drm_clflush_pages(ttm->pages, ttm->num_pages);
>
> for (i = 0; i < ttm->num_pages; ++i) {
>
In function ttm_tt_set_caching
,,,
if (ttm->caching_state == tt_cached)
drm_clflush_pages(ttm->pages, ttm->num_pages);
for (i = 0; i < ttm->num_pages; ++i) {
cur_page = ttm->pages[i];
if (likely(cur_page != NULL)) {
ret = ttm_tt_set_page_caching(cur
1);
only do flush cache when high memory and leave the linear memory flush in
function set_memory_uc/wc?
2012/3/20 Jerome Glisse
> On Mon, 2012-03-19 at 23:11 +0800, Scott Fang wrote:
> > In function ttm_tt_set_caching
> > ,,,
> >
> > if (ttm->caching_state
typo error. abundant=>redundant
2012/3/19 Scott Fang
> In function ttm_tt_set_caching
> ,,,
>
> if (ttm->caching_state == tt_cached)
> drm_clflush_pages(ttm->pages, ttm->num_pages);
>
> for (i = 0; i < ttm->num_pages; ++i) {
>
In function ttm_tt_set_caching
,,,
if (ttm->caching_state == tt_cached)
drm_clflush_pages(ttm->pages, ttm->num_pages);
for (i = 0; i < ttm->num_pages; ++i) {
cur_page = ttm->pages[i];
if (likely(cur_page != NULL)) {
ret = ttm_tt_set_page_caching(cur
