Proxmox-Port/linux
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2025-08-27 05:36:11 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

drm/ttm: Increase pool shrinker batch target

Browse Source 
The default core shrink target of 128 pages (SHRINK_BATCH) is quite low
relative to how cheap TTM pool shrinking is, and how the free pages are
distributed in page order pools.

We can make the target a bit more aggressive by making it roughly the
average number of pages across all pools, freeing more of the cached
pages every time shrinker core invokes our callback.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@igalia.com>
Cc: Christian König <christian.koenig@amd.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Tvrtko Ursulin <tursulin@ursulin.net>
Link: https://lore.kernel.org/r/20250603112750.34997-3-tvrtko.ursulin@igalia.com
This commit is contained in:
Tvrtko Ursulin 2025-06-03 12:27:50 +01:00 committed by Tvrtko Ursulin
parent eac21f8ebe
commit 22b929b252
1 changed files with 8 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
drivers/gpu/drm/ttm/ttm_pool.c
View File

@ -1265,10 +1265,16 @@ int ttm_pool_debugfs(struct ttm_pool *pool, struct seq_file *m)
}
EXPORT_SYMBOL(ttm_pool_debugfs);
/* Free average pool number of pages. */
#define TTM_SHRINKER_BATCH ((1 << (MAX_PAGE_ORDER / 2)) * NR_PAGE_ORDERS)
/* Test the shrinker functions and dump the result */
static int ttm_pool_debugfs_shrink_show(struct seq_file *m, void *data)
{
struct shrink_control sc = { .gfp_mask = GFP_NOFS };
struct shrink_control sc = {
.gfp_mask = GFP_NOFS,
.nr_to_scan = TTM_SHRINKER_BATCH,
};
fs_reclaim_acquire(GFP_KERNEL);
seq_printf(m, "%lu/%lu\n", ttm_pool_shrinker_count(mm_shrinker, &sc),
@ -1326,6 +1332,7 @@ int ttm_pool_mgr_init(unsigned long num_pages)
mm_shrinker->count_objects = ttm_pool_shrinker_count;
mm_shrinker->scan_objects = ttm_pool_shrinker_scan;
mm_shrinker->batch = TTM_SHRINKER_BATCH;
mm_shrinker->seeks = 1;
shrinker_register(mm_shrinker);