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mountd: correctly handle poll() timeout case, solves possible 100% CPU load when idle (#7293)

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SVN-Revision: 27635
This commit is contained in:
Jo-Philipp Wich
2011-07-17 11:58:05 +00:00
parent 1e34c02e3e
commit 61aba42d5c
2 changed files with 34 additions and 2 deletions
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4
package/mountd/Makefile
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@@ -1,11 +1,11 @@
# Copyright (C) 2009-2010 OpenWrt.org
# Copyright (C) 2009-2011 OpenWrt.org
# All rights reserved.
include $(TOPDIR)/rules.mk
PKG_NAME:=mountd
PKG_VERSION:=0.1
PKG_RELEASE:=3
PKG_RELEASE:=4
PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
PKG_SOURCE_URL:=http://mirror2.openwrt.org/sources

32
package/mountd/patches/020-handle_timeout.patch Normal file
View File

@@ -0,0 +1,32 @@
--- a/lib/autofs.c
+++ b/lib/autofs.c
@@ -140,6 +140,7 @@ static int fullread(void *ptr, size_t le
static int autofs_in(union autofs_v5_packet_union *pkt)
{
+ int res;
struct pollfd fds[1];
fds[0].fd = fdout;
@@ -147,15 +148,19 @@ static int autofs_in(union autofs_v5_pac
while(1)
{
- if(poll(fds, 2, 1000) == -1)
+ res = poll(fds, 1, -1);
+
+ if (res == -1)
{
if (errno == EINTR)
continue;
log_printf("failed while trying to read packet from kernel\n");
return -1;
}
- if(fds[0].revents & POLLIN)
+ else if ((res > 0) && (fds[0].revents & POLLIN))
+ {
return fullread(pkt, sizeof(*pkt));
+ }
}
}