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urngd: fix busy loop in case of ioctl cause high cpu usage

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This commit is contained in:
lean 2021-06-21 11:52:55 +08:00
parent e616c4b3f8
commit e3b1fa5ef0
2 changed files with 20 additions and 1 deletions
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2
package/system/urngd/Makefile
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@ -1,7 +1,7 @@
include $(TOPDIR)/rules.mk include $(TOPDIR)/rules.mk
PKG_NAME:=urngd PKG_NAME:=urngd
PKG_RELEASE:=1 PKG_RELEASE:=2
PKG_SOURCE_PROTO:=git PKG_SOURCE_PROTO:=git
PKG_SOURCE_URL=$(PROJECT_GIT)/project/urngd.git PKG_SOURCE_URL=$(PROJECT_GIT)/project/urngd.git

19
package/system/urngd/patches/0001-fix-high-cpu-usage-with-docker.patch Normal file
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@ -0,0 +1,19 @@
diff --git a/urngd.c b/urngd.c
index 35ccdec..410d300 100644
--- a/urngd.c
+++ b/urngd.c
@@ -129,9 +129,14 @@ static size_t gather_entropy(struct urngd *u)
static void low_entropy_cb(struct uloop_fd *ufd, unsigned int events)
{
struct urngd *u = container_of(ufd, struct urngd, rnd_fd);
+ size_t res;
DEBUG(2, DEV_RANDOM " signals low entropy\n");
- gather_entropy(u);
+ res = gather_entropy(u);
+ if (!res) {
+ DEBUG(2, "gather_entropy failed, delaying further attempts\n");
+ sleep(60);
+ }
}