Denys Vlasenko 5bce135e36 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>		2013-02-27 10:51:41 +01:00
..
volume_id
acpid.c
blkid.c
blockdev.c
Config.src
dmesg.c
fbset.c
fdformat.c
fdisk_aix.c
fdisk_gpt.c
fdisk_osf.c
fdisk_sgi.c
fdisk_sun.c
fdisk.c
findfs.c
flock.c
freeramdisk.c
fsck_minix.c
getopt.c
hexdump.c
hwclock.c
ipcrm.c
ipcs.c
Kbuild.src
losetup.c
lspci.c
lsusb.c
mdev.c	mdev: improve $SEQ handling; improve debug logging	2013-02-27 10:51:41 +01:00
minix.h
mkfs_ext2_test.sh
mkfs_ext2.c
mkfs_ext2.txt
mkfs_minix.c
mkfs_reiser.c
mkfs_vfat.c
mkswap.c
more.c
mount.c
pivot_root.c
rdate.c
rdev.c
readprofile.c
rev.c
rtcwake.c
script.c
scriptreplay.c
setarch.c
swaponoff.c
switch_root.c
umount.c