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device: log debug when I/O bounce buffer used

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This commit is contained in:
Alasdair G Kergon 2017-11-16 19:16:10 +00:00
parent efb0e7ac6f
commit 115e66e9be
1 changed files with 3 additions and 0 deletions
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3
lib/device/dev-io.c
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@ -234,6 +234,9 @@ static int _aligned_io(struct device_area *where, char *buffer,
!((uintptr_t) buffer & mask)) !((uintptr_t) buffer & mask))
return _io(where, buffer, should_write); return _io(where, buffer, should_write);
log_debug_io("Widening request for %" PRIu64 " bytes at %" PRIu64 " to %" PRIu64 " bytes at %" PRIu64 " on %s",
where->size, (uint64_t) where->start, widened.size, (uint64_t) widened.start, dev_name(where->dev));
/* Allocate a bounce buffer with an extra block */ /* Allocate a bounce buffer with an extra block */
if (!(bounce_buf = bounce = dm_malloc((size_t) widened.size + block_size))) { if (!(bounce_buf = bounce = dm_malloc((size_t) widened.size + block_size))) {
log_error("Bounce buffer malloc failed"); log_error("Bounce buffer malloc failed");