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mm: cma: retry only on EBUSY

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Retry the cma alloc only when alloc_contig_range returns
-EBUSY. This avoids unnecessary retries when the heap is
full.

Change-Id: If4626f0a0bc14e4b3a500283eb5a4c33b78fb6f2
Signed-off-by: Vinayak Menon <[email protected]>
This commit is contained in:
Vinayak Menon 2018-08-08 13:23:23 +05:30 • committed by Gerrit - the friendly Code Review server
commit 54261b6432
1 changed files with 2 additions and 1 deletions
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3
mm/cma.c
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@ -480,7 +480,8 @@ struct page *cma_alloc(struct cma *cma, size_t count, unsigned int align,
bitmap_maxno, start, bitmap_count, mask,
offset);
if (bitmap_no >= bitmap_maxno) {
if (retry_after_sleep < max_retries) {
if ((retry_after_sleep < max_retries) &&
(ret == -EBUSY)) {
start = 0;
/*
* update max retries if available free regions