/* * Quicklist support. * * Quicklists are light weight lists of pages that have a defined state * on alloc and free. Pages must be in the quicklist specific defined state * (zero by default) when the page is freed. It seems that the initial idea * for such lists first came from Dave Miller and then various other people * improved on it. * * Copyright (C) 2007 SGI, * Christoph Lameter * Generalized, added support for multiple lists and * constructors / destructors. */ #include #include #include #include #include DEFINE_PER_CPU(struct quicklist [CONFIG_NR_QUICK], quicklist); #define FRACTION_OF_NODE_MEM 16 static unsigned long max_pages(unsigned long min_pages) { unsigned long node_free_pages, max; int node = numa_node_id(); struct zone *zones = NODE_DATA(node)->node_zones; int num_cpus_on_node; node_free_pages = #ifdef CONFIG_ZONE_DMA zone_page_state(&zones[ZONE_DMA], NR_FREE_PAGES) + #endif #ifdef CONFIG_ZONE_DMA32 zone_page_state(&zones[ZONE_DMA32], NR_FREE_PAGES) + #endif zone_page_state(&zones[ZONE_NORMAL], NR_FREE_PAGES); max = node_free_pages / FRACTION_OF_NODE_MEM; num_cpus_on_node = cpumask_weight(cpumask_of_node(node)); max /= num_cpus_on_node; return max(max, min_pages); } static long min_pages_to_free(struct quicklist *q, unsigned long min_pages, long max_free) { long pages_to_free; pages_to_free = q->nr_pages - max_pages(min_pages); return min(pages_to_free, max_free); } /* * Trim down the number of pages in the quicklist */ void quicklist_trim(int nr, void (*dtor)(void *), unsigned long min_pages, unsigned long max_free) { long pages_to_free; struct quicklist *q; q = &get_cpu_var(quicklist)[nr]; if (q->nr_pages > min_pages) { pages_to_free = min_pages_to_free(q, min_pages, max_free); while (pages_to_free > 0) { /* * We pass a gfp_t of 0 to quicklist_alloc here * because we will never call into the page allocator. */ void *p = quicklist_alloc(nr, 0, NULL); if (dtor) dtor(p); free_page((unsigned long)p); pages_to_free--; } } put_cpu_var(quicklist); } unsigned long quicklist_total_size(void) { unsigned long count = 0; int cpu; struct quicklist *ql, *q; for_each_online_cpu(cpu) { ql = per_cpu(quicklist, cpu); for (q = ql; q < ql + CONFIG_NR_QUICK; q++) count += q->nr_pages; } return count; } itter'>committer
path: root/drivers/usb/musb/Kconfig
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authorLinus Torvalds <torvalds@linux-foundation.org>2017-01-24 16:54:39 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2017-01-24 16:54:39 -0800
commit883af14e67e8b8702b5560aa64c888c0cd0bd66c (patch)
tree74e3a6b53f5fad9f7848ab1b9f6921b7012940a4 /drivers/usb/musb/Kconfig
parent0263d4ebd94b36280608e296cba39b924b6e832b (diff)
parentaab45453ff5c77200c6da4ac909f7a4392aed17e (diff)
Merge branch 'akpm' (patches from Andrew)
Merge fixes from Andrew Morton: "26 fixes" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (26 commits) MAINTAINERS: add Dan Streetman to zbud maintainers MAINTAINERS: add Dan Streetman to zswap maintainers mm: do not export ioremap_page_range symbol for external module mn10300: fix build error of missing fpu_save() romfs: use different way to generate fsid for BLOCK or MTD frv: add missing atomic64 operations mm, page_alloc: fix premature OOM when racing with cpuset mems update mm, page_alloc: move cpuset seqcount checking to slowpath mm, page_alloc: fix fast-path race with cpuset update or removal mm, page_alloc: fix check for NULL preferred_zone kernel/panic.c: add missing \n fbdev: color map copying bounds checking frv: add atomic64_add_unless() mm/mempolicy.c: do not put mempolicy before using its nodemask radix-tree: fix private list warnings Documentation/filesystems/proc.txt: add VmPin mm, memcg: do not retry precharge charges proc: add a schedule point in proc_pid_readdir() mm: alloc_contig: re-allow CMA to compact FS pages mm/slub.c: trace free objects at KERN_INFO ...
Diffstat (limited to 'drivers/usb/musb/Kconfig')