lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Merge branch 'for-linus' of git://git.kernel.dk/linux-block

Browse Source 
* 'for-linus' of git://git.kernel.dk/linux-block: (23 commits)
  Revert "cfq: Remove special treatment for metadata rqs."
  block: fix flush machinery for stacking drivers with differring flush flags
  block: improve rq_affinity placement
  blktrace: add FLUSH/FUA support
  Move some REQ flags to the common bio/request area
  allow blk_flush_policy to return REQ_FSEQ_DATA independent of *FLUSH
  xen/blkback: Make description more obvious.
  cfq-iosched: Add documentation about idling
  block: Make rq_affinity = 1 work as expected
  block: swim3: fix unterminated of_device_id table
  block/genhd.c: remove useless cast in diskstats_show()
  drivers/cdrom/cdrom.c: relax check on dvd manufacturer value
  drivers/block/drbd/drbd_nl.c: use bitmap_parse instead of __bitmap_parse
  bsg-lib: add module.h include
  cfq-iosched: Reduce linked group count upon group destruction
  blk-throttle: correctly determine sync bio
  loop: fix deadlock when sysfs and LOOP_CLR_FD race against each other
  loop: add BLK_DEV_LOOP_MIN_COUNT=%i to allow distros 0 pre-allocated loop devices
  loop: add management interface for on-demand device allocation
  loop: replace linked list of allocated devices with an idr index
  ...
This commit is contained in:
Linus Torvalds
2011-08-19 10:47:07 -07:00
parent 0c3bef6128 b53d1ed734
commit 5ccc38740a
26 changed files with 801 additions and 136 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
kernel/trace/blktrace.c
View File

@ -206,6 +206,8 @@ static void __blk_add_trace(struct blk_trace *bt, sector_t sector, int bytes,
what |= MASK_TC_BIT(rw, RAHEAD);
what |= MASK_TC_BIT(rw, META);
what |= MASK_TC_BIT(rw, DISCARD);
what |= MASK_TC_BIT(rw, FLUSH);
what |= MASK_TC_BIT(rw, FUA);
pid = tsk->pid;
if (act_log_check(bt, what, sector, pid))
@ -1054,6 +1056,9 @@ static void fill_rwbs(char *rwbs, const struct blk_io_trace *t)
goto out;
}
if (tc & BLK_TC_FLUSH)
rwbs[i++] = 'F';
if (tc & BLK_TC_DISCARD)
rwbs[i++] = 'D';
else if (tc & BLK_TC_WRITE)
@ -1063,10 +1068,10 @@ static void fill_rwbs(char *rwbs, const struct blk_io_trace *t)
else
rwbs[i++] = 'N';
if (tc & BLK_TC_FUA)
rwbs[i++] = 'F';
if (tc & BLK_TC_AHEAD)
rwbs[i++] = 'A';
if (tc & BLK_TC_BARRIER)
rwbs[i++] = 'B';
if (tc & BLK_TC_SYNC)
rwbs[i++] = 'S';
if (tc & BLK_TC_META)
@ -1132,7 +1137,7 @@ typedef int (blk_log_action_t) (struct trace_iterator *iter, const char *act);
static int blk_log_action_classic(struct trace_iterator *iter, const char *act)
{
char rwbs[6];
char rwbs[RWBS_LEN];
unsigned long long ts = iter->ts;
unsigned long nsec_rem = do_div(ts, NSEC_PER_SEC);
unsigned secs = (unsigned long)ts;
@ -1148,7 +1153,7 @@ static int blk_log_action_classic(struct trace_iterator *iter, const char *act)
static int blk_log_action(struct trace_iterator *iter, const char *act)
{
char rwbs[6];
char rwbs[RWBS_LEN];
const struct blk_io_trace *t = te_blk_io_trace(iter->ent);
fill_rwbs(rwbs, t);
@ -1561,7 +1566,7 @@ static const struct {
} mask_maps[] = {
{ BLK_TC_READ, "read" },
{ BLK_TC_WRITE, "write" },
{ BLK_TC_BARRIER, "barrier" },
{ BLK_TC_FLUSH, "flush" },
{ BLK_TC_SYNC, "sync" },
{ BLK_TC_QUEUE, "queue" },
{ BLK_TC_REQUEUE, "requeue" },
@ -1573,6 +1578,7 @@ static const struct {
{ BLK_TC_META, "meta" },
{ BLK_TC_DISCARD, "discard" },
{ BLK_TC_DRV_DATA, "drv_data" },
{ BLK_TC_FUA, "fua" },
};
static int blk_trace_str2mask(const char *str)
@ -1788,6 +1794,9 @@ void blk_fill_rwbs(char *rwbs, u32 rw, int bytes)
{
int i = 0;
if (rw & REQ_FLUSH)
rwbs[i++] = 'F';
if (rw & WRITE)
rwbs[i++] = 'W';
else if (rw & REQ_DISCARD)
@ -1797,6 +1806,8 @@ void blk_fill_rwbs(char *rwbs, u32 rw, int bytes)
else
rwbs[i++] = 'N';
if (rw & REQ_FUA)
rwbs[i++] = 'F';
if (rw & REQ_RAHEAD)
rwbs[i++] = 'A';
if (rw & REQ_SYNC)