msm: kgsl: Stop slab shrinker when no more pages can be reclaimed

do_shrink_slab() scans each shrinker in batches of at most
batch_size (128) pages at a time until total_scan pages are
scanned or until shrinker returns SHRINK_STOP. Under heavy
memory pressure total_scan can be large (in thousands) and
kgsl_pool_shrink_scan_objects() ends up returning 0 after
all pages that were reclaimable are reclaimed. This results in
multiple calls to kgsl_pool_shrink_scan_objects() that do not
reclaim any memory. To prevent this kgsl_pool_shrink_scan_objects()
is modified to return SHRINK_STOP as soon as no more memory can
be reclaimed.

Bug: 69931996
Test: tested using alloc-stress with additional traces

Change-Id: Ia48fc2c0d888c54ec9642c0b0962a70ca3cb4c5e
Signed-off-by: Suren Baghdasaryan <surenb@google.com>

0 files changed, 0 insertions, 0 deletions