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Don't iterate the whole /sys/devices just to find drm device

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On some large systems, /sys/devices is huge and it's not a wise idea to
iterate it. `find` may cause tremendous contention on the kernfs_mutex
when there are already stress on /sys, and it will perform very very
poorly.

Simply check if drm class presents should be good enough.

Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Pingfan Liu <piliu@redhat.com>
This commit is contained in:
Kairui Song 2021-03-19 18:21:11 +08:00
parent ad655087c9
commit c6021648f1
1 changed files with 1 additions and 1 deletions
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2
dracut-module-setup.sh
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@ -58,7 +58,7 @@ depends() {
_dep="$_dep znet" _dep="$_dep znet"
fi fi
if [ -n "$( find /sys/devices -name drm )" ] || [ -d /sys/module/hyperv_fb ]; then if [ -n "$( ls -A /sys/class/drm 2>/dev/null )" ] || [ -d /sys/module/hyperv_fb ]; then
add_opt_module drm add_opt_module drm
fi fi