diff options
| author | Zhaoyang Huang <zhaoyang.huang@unisoc.com> | 2023-05-11 13:22:30 +0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-05-07 11:29:54 -0700 |
| commit | 69e5f6e0d30577fc2a13cf09f9b2da8e5aaa6c46 (patch) | |
| tree | ef72f1e955e4f416aec2ab7f0bf9192c732d65f5 /drivers/fpga/fpga-mgr.c | |
| parent | 1553e3e07b2f4497df0152884596b20ed86a0367 (diff) | |
mm: optimization on page allocation when CMA enabled
According to current CMA utilization policy, an alloc_pages(GFP_USER)
could 'steal' UNMOVABLE & RECLAIMABLE page blocks via the help of CMA(pass
zone_watermark_ok by counting CMA in but use U&R in rmqueue), which could
lead to following alloc_pages(GFP_KERNEL) fail. Solving this by
introducing second watermark checking for GFP_MOVABLE, which could have
the allocation use CMA when proper.
-- Free_pages(30MB)
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-- WMARK_LOW(25MB)
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-- Free_CMA(12MB)
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|
--
Link: https://lkml.kernel.org/r/20231016071245.2865233-1-zhaoyang.huang@unisoc.com
Link: https://lkml.kernel.org/r/1683782550-25799-1-git-send-email-zhaoyang.huang@unisoc.com
Signed-off-by: Zhaoyang Huang <zhaoyang.huang@unisoc.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: ke.wang <ke.wang@unisoc.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Zhaoyang Huang <huangzhaoyang@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'drivers/fpga/fpga-mgr.c')
0 files changed, 0 insertions, 0 deletions