type stringclasses 5
values | content stringlengths 9 163k |
|---|---|
includes |
#include <stdio.h> |
includes | #include <stdlib.h> |
defines | #define _MALLOC_INTERNAL |
functions | void
tr_break ()
{
} |
functions | void
mtrace ()
{
char *mallfile;
mallfile = getenv (mallenv);
if (mallfile != NULL || mallwatch != NULL)
{
mallstream = fopen (mallfile != NULL ? mallfile : "/dev/null", "w");
if (mallstream != NULL)
{
/* Be sure it doesn't malloc its buffer! */
setbuf (mallstream, mallbuf);
fprintf (m... |
includes |
#include <linux/kernel.h> |
includes | #include <linux/export.h> |
includes | #include <linux/spinlock.h> |
includes | #include <linux/fs.h> |
includes | #include <linux/mm.h> |
includes | #include <linux/swap.h> |
includes | #include <linux/slab.h> |
includes | #include <linux/pagemap.h> |
includes | #include <linux/writeback.h> |
includes | #include <linux/init.h> |
includes | #include <linux/backing-dev.h> |
includes | #include <linux/task_io_accounting_ops.h> |
includes | #include <linux/blkdev.h> |
includes | #include <linux/mpage.h> |
includes | #include <linux/rmap.h> |
includes | #include <linux/percpu.h> |
includes | #include <linux/smp.h> |
includes | #include <linux/sysctl.h> |
includes | #include <linux/cpu.h> |
includes | #include <linux/syscalls.h> |
includes | #include <linux/buffer_head.h> |
includes | #include <linux/pagevec.h> |
includes | #include <linux/timer.h> |
includes | #include <linux/sched/rt.h> |
includes | #include <linux/sched/signal.h> |
includes | #include <linux/mm_inline.h> |
includes | #include <trace/events/writeback.h> |
defines | #define MAX_PAUSE max(HZ/5, 1) |
defines | #define DIRTY_POLL_THRESH (128 >> (PAGE_SHIFT - 10)) |
defines | #define BANDWIDTH_INTERVAL max(HZ/5, 1) |
defines |
#define RATELIMIT_CALC_SHIFT 10 |
defines | #define VM_COMPLETIONS_PERIOD_LEN (3*HZ) |
defines |
#define GDTC_INIT(__wb) .wb = (__wb), \ |
defines |
#define GDTC_INIT_NO_WB .dom = &global_wb_domain |
defines |
#define MDTC_INIT(__wb, __gdtc) .wb = (__wb), \ |
defines |
#define GDTC_INIT(__wb) .wb = (__wb), \ |
defines | #define GDTC_INIT_NO_WB |
defines | #define MDTC_INIT(__wb, __gdtc) |
structs | struct dirty_throttle_control {
#ifdef CONFIG_CGROUP_WRITEBACK
struct wb_domain *dom;
struct dirty_throttle_control *gdtc; /* only set in memcg dtc's */
#endif
struct bdi_writeback *wb;
struct fprop_local_percpu *wb_completions;
unsigned long avail; /* dirtyable */
unsigned long dirty; /* file_dirty + write ... |
functions | bool mdtc_valid(struct dirty_throttle_control *dtc)
{
return dtc->dom;
} |
functions | void wb_min_max_ratio(struct bdi_writeback *wb,
unsigned long *minp, unsigned long *maxp)
{
unsigned long this_bw = wb->avg_write_bandwidth;
unsigned long tot_bw = atomic_long_read(&wb->bdi->tot_write_bandwidth);
unsigned long long min = wb->bdi->min_ratio;
unsigned long long max = wb->bdi->max_ratio;
/*
... |
functions | bool mdtc_valid(struct dirty_throttle_control *dtc)
{
return false;
} |
functions | void wb_min_max_ratio(struct bdi_writeback *wb,
unsigned long *minp, unsigned long *maxp)
{
*minp = wb->bdi->min_ratio;
*maxp = wb->bdi->max_ratio;
} |
functions | long node_dirtyable_memory(struct pglist_data *pgdat)
{
unsigned long nr_pages = 0;
int z;
for (z = 0; z < MAX_NR_ZONES; z++) {
struct zone *zone = pgdat->node_zones + z;
if (!populated_zone(zone))
continue;
nr_pages += zone_page_state(zone, NR_FREE_PAGES);
} |
functions | long highmem_dirtyable_memory(unsigned long total)
{
#ifdef CONFIG_HIGHMEM
int node;
unsigned long x = 0;
int i;
for_each_node_state(node, N_HIGH_MEMORY) {
for (i = ZONE_NORMAL + 1; i < MAX_NR_ZONES; i++) {
struct zone *z;
unsigned long nr_pages;
if (!is_highmem_idx(i))
continue;
z = &NODE_DATA... |
functions | long global_dirtyable_memory(void)
{
unsigned long x;
x = global_zone_page_state(NR_FREE_PAGES);
/*
* Pages reserved for the kernel should not be considered
* dirtyable, to prevent a situation where reclaim has to
* clean pages in order to balance the zones.
*/
x -= min(x, totalreserve_pages);
x += globa... |
functions | void domain_dirty_limits(struct dirty_throttle_control *dtc)
{
const unsigned long available_memory = dtc->avail;
struct dirty_throttle_control *gdtc = mdtc_gdtc(dtc);
unsigned long bytes = vm_dirty_bytes;
unsigned long bg_bytes = dirty_background_bytes;
/* convert ratios to per-PAGE_SIZE for higher precision */
... |
functions | void global_dirty_limits(unsigned long *pbackground, unsigned long *pdirty)
{
struct dirty_throttle_control gdtc = { GDTC_INIT_NO_WB } |
functions | long node_dirty_limit(struct pglist_data *pgdat)
{
unsigned long node_memory = node_dirtyable_memory(pgdat);
struct task_struct *tsk = current;
unsigned long dirty;
if (vm_dirty_bytes)
dirty = DIV_ROUND_UP(vm_dirty_bytes, PAGE_SIZE) *
node_memory / global_dirtyable_memory();
else
dirty = vm_dirty_ratio * n... |
functions | bool node_dirty_ok(struct pglist_data *pgdat)
{
unsigned long limit = node_dirty_limit(pgdat);
unsigned long nr_pages = 0;
nr_pages += node_page_state(pgdat, NR_FILE_DIRTY);
nr_pages += node_page_state(pgdat, NR_WRITEBACK);
return nr_pages <= limit;
} |
functions | int dirty_background_ratio_handler(struct ctl_table *table, int write,
void *buffer, size_t *lenp, loff_t *ppos)
{
int ret;
ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos);
if (ret == 0 && write)
dirty_background_bytes = 0;
return ret;
} |
functions | int dirty_background_bytes_handler(struct ctl_table *table, int write,
void *buffer, size_t *lenp, loff_t *ppos)
{
int ret;
ret = proc_doulongvec_minmax(table, write, buffer, lenp, ppos);
if (ret == 0 && write)
dirty_background_ratio = 0;
return ret;
} |
functions | int dirty_ratio_handler(struct ctl_table *table, int write, void *buffer,
size_t *lenp, loff_t *ppos)
{
int old_ratio = vm_dirty_ratio;
int ret;
ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos);
if (ret == 0 && write && vm_dirty_ratio != old_ratio) {
writeback_set_ratelimit();
vm_dirty_bytes = 0;... |
functions | int dirty_bytes_handler(struct ctl_table *table, int write,
void *buffer, size_t *lenp, loff_t *ppos)
{
unsigned long old_bytes = vm_dirty_bytes;
int ret;
ret = proc_doulongvec_minmax(table, write, buffer, lenp, ppos);
if (ret == 0 && write && vm_dirty_bytes != old_bytes) {
writeback_set_ratelimit();
vm_dirt... |
functions | long wp_next_time(unsigned long cur_time)
{
cur_time += VM_COMPLETIONS_PERIOD_LEN;
/* 0 has a special meaning... */
if (!cur_time)
return 1;
return cur_time;
} |
functions | void wb_domain_writeout_inc(struct wb_domain *dom,
struct fprop_local_percpu *completions,
unsigned int max_prop_frac)
{
__fprop_inc_percpu_max(&dom->completions, completions,
max_prop_frac);
/* First event after period switching was turned off? */
if (unlikely(!dom->period_time)) {
/*
*... |
functions | void __wb_writeout_inc(struct bdi_writeback *wb)
{
struct wb_domain *cgdom;
inc_wb_stat(wb, WB_WRITTEN);
wb_domain_writeout_inc(&global_wb_domain, &wb->completions,
wb->bdi->max_prop_frac);
cgdom = mem_cgroup_wb_domain(wb);
if (cgdom)
wb_domain_writeout_inc(cgdom, wb_memcg_completions(wb),
... |
functions | void wb_writeout_inc(struct bdi_writeback *wb)
{
unsigned long flags;
local_irq_save(flags);
__wb_writeout_inc(wb);
local_irq_restore(flags);
} |
functions | void writeout_period(struct timer_list *t)
{
struct wb_domain *dom = from_timer(dom, t, period_timer);
int miss_periods = (jiffies - dom->period_time) /
VM_COMPLETIONS_PERIOD_LEN;
if (fprop_new_period(&dom->completions, miss_periods + 1)) {
dom->period_time = wp_next_time(dom->period_time +
miss_period... |
functions | int wb_domain_init(struct wb_domain *dom, gfp_t gfp)
{
memset(dom, 0, sizeof(*dom));
spin_lock_init(&dom->lock);
timer_setup(&dom->period_timer, writeout_period, TIMER_DEFERRABLE);
dom->dirty_limit_tstamp = jiffies;
return fprop_global_init(&dom->completions, gfp);
} |
functions | void wb_domain_exit(struct wb_domain *dom)
{
del_timer_sync(&dom->period_timer);
fprop_global_destroy(&dom->completions);
} |
functions | int bdi_set_min_ratio(struct backing_dev_info *bdi, unsigned int min_ratio)
{
int ret = 0;
spin_lock_bh(&bdi_lock);
if (min_ratio > bdi->max_ratio) {
ret = -EINVAL;
} |
functions | int bdi_set_max_ratio(struct backing_dev_info *bdi, unsigned max_ratio)
{
int ret = 0;
if (max_ratio > 100)
return -EINVAL;
spin_lock_bh(&bdi_lock);
if (bdi->min_ratio > max_ratio) {
ret = -EINVAL;
} |
functions | long dirty_freerun_ceiling(unsigned long thresh,
unsigned long bg_thresh)
{
return (thresh + bg_thresh) / 2;
} |
functions | long hard_dirty_limit(struct wb_domain *dom,
unsigned long thresh)
{
return max(thresh, dom->dirty_limit);
} |
functions | void mdtc_calc_avail(struct dirty_throttle_control *mdtc,
unsigned long filepages, unsigned long headroom)
{
struct dirty_throttle_control *gdtc = mdtc_gdtc(mdtc);
unsigned long clean = filepages - min(filepages, mdtc->dirty);
unsigned long global_clean = gdtc->avail - min(gdtc->avail, gdtc->dirty);
unsigned... |
functions | long __wb_calc_thresh(struct dirty_throttle_control *dtc)
{
struct wb_domain *dom = dtc_dom(dtc);
unsigned long thresh = dtc->thresh;
u64 wb_thresh;
unsigned long numerator, denominator;
unsigned long wb_min_ratio, wb_max_ratio;
/*
* Calculate this BDI's share of the thresh ratio.
*/
fprop_fraction_percpu(&... |
functions | long wb_calc_thresh(struct bdi_writeback *wb, unsigned long thresh)
{
struct dirty_throttle_control gdtc = { GDTC_INIT(wb),
.thresh = thresh } |
functions | long pos_ratio_polynom(unsigned long setpoint,
unsigned long dirty,
unsigned long limit)
{
long long pos_ratio;
long x;
x = div64_s64(((s64)setpoint - (s64)dirty) << RATELIMIT_CALC_SHIFT,
(limit - setpoint) | 1);
pos_ratio = x;
pos_ratio = pos_ratio * x >> RATELIMIT_CALC_SHIFT;
pos_ratio = ... |
functions | void wb_position_ratio(struct dirty_throttle_control *dtc)
{
struct bdi_writeback *wb = dtc->wb;
unsigned long write_bw = wb->avg_write_bandwidth;
unsigned long freerun = dirty_freerun_ceiling(dtc->thresh, dtc->bg_thresh);
unsigned long limit = hard_dirty_limit(dtc_dom(dtc), dtc->thresh);
unsigned long wb_thresh =... |
functions | void wb_update_write_bandwidth(struct bdi_writeback *wb,
unsigned long elapsed,
unsigned long written)
{
const unsigned long period = roundup_pow_of_two(3 * HZ);
unsigned long avg = wb->avg_write_bandwidth;
unsigned long old = wb->write_bandwidth;
u64 bw;
/*
* bw = written * HZ / elapsed
*... |
functions | void update_dirty_limit(struct dirty_throttle_control *dtc)
{
struct wb_domain *dom = dtc_dom(dtc);
unsigned long thresh = dtc->thresh;
unsigned long limit = dom->dirty_limit;
/*
* Follow up in one step.
*/
if (limit < thresh) {
limit = thresh;
goto update;
} |
functions | void domain_update_bandwidth(struct dirty_throttle_control *dtc,
unsigned long now)
{
struct wb_domain *dom = dtc_dom(dtc);
/*
* check locklessly first to optimize away locking for the most time
*/
if (time_before(now, dom->dirty_limit_tstamp + BANDWIDTH_INTERVAL))
return;
spin_lock(&dom->lock);
if... |
functions | void wb_update_dirty_ratelimit(struct dirty_throttle_control *dtc,
unsigned long dirtied,
unsigned long elapsed)
{
struct bdi_writeback *wb = dtc->wb;
unsigned long dirty = dtc->dirty;
unsigned long freerun = dirty_freerun_ceiling(dtc->thresh, dtc->bg_thresh);
unsigned long limit = hard_dirty_li... |
functions | void __wb_update_bandwidth(struct dirty_throttle_control *gdtc,
struct dirty_throttle_control *mdtc,
unsigned long start_time,
bool update_ratelimit)
{
struct bdi_writeback *wb = gdtc->wb;
unsigned long now = jiffies;
unsigned long elapsed = now - wb->bw_time_stamp;
unsigned long dirtied;
unsigne... |
functions | void wb_update_bandwidth(struct bdi_writeback *wb, unsigned long start_time)
{
struct dirty_throttle_control gdtc = { GDTC_INIT(wb) } |
functions | long dirty_poll_interval(unsigned long dirty,
unsigned long thresh)
{
if (thresh > dirty)
return 1UL << (ilog2(thresh - dirty) >> 1);
return 1;
} |
functions | long wb_max_pause(struct bdi_writeback *wb,
unsigned long wb_dirty)
{
unsigned long bw = wb->avg_write_bandwidth;
unsigned long t;
/*
* Limit pause time for small memory systems. If sleeping for too long
* time, a small pool of dirty/writeback pages may go empty and disk go
* idle.
*
* 8 serves as t... |
functions | long wb_min_pause(struct bdi_writeback *wb,
long max_pause,
unsigned long task_ratelimit,
unsigned long dirty_ratelimit,
int *nr_dirtied_pause)
{
long hi = ilog2(wb->avg_write_bandwidth);
long lo = ilog2(wb->dirty_ratelimit);
long t; /* target pause */
long pause; /* estimated next pause */
int pa... |
functions | void wb_dirty_limits(struct dirty_throttle_control *dtc)
{
struct bdi_writeback *wb = dtc->wb;
unsigned long wb_reclaimable;
/*
* wb_thresh is not treated as some limiting factor as
* dirty_thresh, due to reasons
* - in JBOD setup, wb_thresh can fluctuate a lot
* - in a system with HDD and USB key, the USB ... |
functions | void balance_dirty_pages(struct bdi_writeback *wb,
unsigned long pages_dirtied)
{
struct dirty_throttle_control gdtc_stor = { GDTC_INIT(wb) } |
functions | else if (period) {
current->dirty_paused_when += period;
current->nr_dirtied = 0;
} |
functions | void balance_dirty_pages_ratelimited(struct address_space *mapping)
{
struct inode *inode = mapping->host;
struct backing_dev_info *bdi = inode_to_bdi(inode);
struct bdi_writeback *wb = NULL;
int ratelimit;
int *p;
if (!(bdi->capabilities & BDI_CAP_WRITEBACK))
return;
if (inode_cgwb_enabled(inode))
wb = wb... |
functions | bool wb_over_bg_thresh(struct bdi_writeback *wb)
{
struct dirty_throttle_control gdtc_stor = { GDTC_INIT(wb) } |
functions | int dirty_writeback_centisecs_handler(struct ctl_table *table, int write,
void *buffer, size_t *length, loff_t *ppos)
{
unsigned int old_interval = dirty_writeback_interval;
int ret;
ret = proc_dointvec(table, write, buffer, length, ppos);
/*
* Writing 0 to dirty_writeback_interval will disable periodic write... |
functions | void laptop_mode_timer_fn(struct timer_list *t)
{
struct backing_dev_info *backing_dev_info =
from_timer(backing_dev_info, t, laptop_mode_wb_timer);
wakeup_flusher_threads_bdi(backing_dev_info, WB_REASON_LAPTOP_TIMER);
} |
functions | void laptop_io_completion(struct backing_dev_info *info)
{
mod_timer(&info->laptop_mode_wb_timer, jiffies + laptop_mode);
} |
functions | void laptop_sync_completion(void)
{
struct backing_dev_info *bdi;
rcu_read_lock();
list_for_each_entry_rcu(bdi, &bdi_list, bdi_list)
del_timer(&bdi->laptop_mode_wb_timer);
rcu_read_unlock();
} |
functions | void writeback_set_ratelimit(void)
{
struct wb_domain *dom = &global_wb_domain;
unsigned long background_thresh;
unsigned long dirty_thresh;
global_dirty_limits(&background_thresh, &dirty_thresh);
dom->dirty_limit = dirty_thresh;
ratelimit_pages = dirty_thresh / (num_online_cpus() * 32);
if (ratelimit_pages < 1... |
functions | int page_writeback_cpu_online(unsigned int cpu)
{
writeback_set_ratelimit();
return 0;
} |
functions | __init page_writeback_init(void)
{
BUG_ON(wb_domain_init(&global_wb_domain, GFP_KERNEL));
cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "mm/writeback:online",
page_writeback_cpu_online, NULL);
cpuhp_setup_state(CPUHP_MM_WRITEBACK_DEAD, "mm/writeback:dead", NULL,
page_writeback_cpu_online);
} |
functions | void tag_pages_for_writeback(struct address_space *mapping,
pgoff_t start, pgoff_t end)
{
XA_STATE(xas, &mapping->i_pages, start);
unsigned int tagged = 0;
void *page;
xas_lock_irq(&xas);
xas_for_each_marked(&xas, page, end, PAGECACHE_TAG_DIRTY) {
xas_set_mark(&xas, PAGECACHE_TAG_TOWRITE);
if (++tagge... |
functions | int write_cache_pages(struct address_space *mapping,
struct writeback_control *wbc, writepage_t writepage,
void *data)
{
int ret = 0;
int done = 0;
int error;
struct pagevec pvec;
int nr_pages;
pgoff_t index;
pgoff_t end; /* Inclusive */
pgoff_t done_index;
int range_whole = 0;
xa_mark_t tag;... |
functions | else if (wbc->sync_mode != WB_SYNC_ALL) {
ret = error;
done_index = page->index + 1;
done = 1;
break;
} |
functions | int __writepage(struct page *page, struct writeback_control *wbc,
void *data)
{
struct address_space *mapping = data;
int ret = mapping->a_ops->writepage(page, wbc);
mapping_set_error(mapping, ret);
return ret;
} |
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