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authorDenys Vlasenko2013-02-27 10:51:41 +0100
committerDenys Vlasenko2013-02-27 10:51:41 +0100
commit5bce135e36800a34a273376d5ea1f052ed2d4212 (patch)
tree00a35271b59d2e6e029555296ff6e0ee79451e30 /examples
parent9fed24c031a885264a9249eed3b6c654c32ce139 (diff)
downloadbusybox-5bce135e36800a34a273376d5ea1f052ed2d4212.zip
busybox-5bce135e36800a34a273376d5ea1f052ed2d4212.tar.gz
mdev: improve $SEQ handling; improve debug logging
Sequential run of concurrent mdev's was too simplistic: they waited for /dev/mdev.seq to match. This could sometimes cause cumulative loss of time on the order of a second. Added SIGCHLD signaling from exiting mdev to all other mdev's. Added debugging required to see that code actually works as intended. Example of /dev/mdev.log (with "woken up" elevated from dbg lvl 3 to 2): mdev[1023]: first seq written ^^^^ seq, not pid mdev[1023]: 35.022395 ACTION:add SUBSYSTEM:module DEVNAME:(null) DEVPATH:/module/lib80211 mdev[1023]: rule matched, line -1 ^^^^^^^ means "default rule" mdev[1023]: 35.022676 exiting ^^^^^^^^^ second,usec timestamp mdev[1024]: 35.069691 ACTION:add SUBSYSTEM:vc DEVNAME:vcs9 DEVPATH:/devices/virtual/vc/vcs9 mdev[1024]: dev 7,9 mdev[1025]: 35.069889 waiting for '1024' mdev[1026]: 35.069946 waiting for '1024' mdev[1027]: 35.070151 waiting for '1024' mdev[1024]: rule matched, line -1 mdev[1024]: mknod vcs9 (7,9) 20660 0:0 mdev[1024]: 35.070346 exiting mdev[1025]: woken up mdev[1026]: woken up mdev[1025]: 35.071213 ACTION:add SUBSYSTEM:vc DEVNAME:vcsa9 DEVPATH:/devices/virtual/vc/vcsa9 ^^^^^^^^^ took only a millisecond to start running after prev mdev exited mdev[1025]: dev 7,137 mdev[1027]: woken up mdev[1025]: rule matched, line -1 mdev[1025]: mknod vcsa9 (7,137) 20660 0:0 mdev[1025]: 35.072109 exiting function old new delta mdev_main 849 1372 +523 curtime - 59 +59 dirAction 87 134 +47 static.ts - 8 +8 keywords 19 12 -7 make_device 2189 2119 -70 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'examples')
-rw-r--r--examples/mdev_fat.conf7
1 files changed, 4 insertions, 3 deletions
diff --git a/examples/mdev_fat.conf b/examples/mdev_fat.conf
index ceba3a7..bceddb2 100644
--- a/examples/mdev_fat.conf
+++ b/examples/mdev_fat.conf
@@ -7,9 +7,9 @@
# instead of the default 0:0 660.
#
# Syntax:
-# [-]devicename_regex user:group mode [=path]|[>path]|[!] [@|$|*cmd args...]
-# [-]$ENVVAR=regex user:group mode [=path]|[>path]|[!] [@|$|*cmd args...]
-# [-]@maj,min[-min2] user:group mode [=path]|[>path]|[!] [@|$|*cmd args...]
+# [-][ENVVAR=regex;]...devicename_regex user:group mode [=path]|[>path]|[!] [@|$|*cmd args...]
+# [-][ENVVAR=regex;]...@maj,min[-min2] user:group mode [=path]|[>path]|[!] [@|$|*cmd args...]
+# [-]$ENVVAR=regex user:group mode [=path]|[>path]|[!] [@|$|*cmd args...]
#
# [-]: do not stop on this match, continue reading mdev.conf
# =: move, >: move and create a symlink
@@ -53,6 +53,7 @@ sr[0-9]* root:cdrom 660 @ln -sf $MDEV cdrom
fd[0-9]* root:floppy 660
# net devices
+SUBSYSTEM=net;.* root:root 600 @nameif
tun[0-9]* root:root 600 =net/
tap[0-9]* root:root 600 =net/