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-rw-r--r--guix/build/linux-initrd.scm7
1 files changed, 5 insertions, 2 deletions
diff --git a/guix/build/linux-initrd.scm b/guix/build/linux-initrd.scm
index c1a0247aff..627c55f865 100644
--- a/guix/build/linux-initrd.scm
+++ b/guix/build/linux-initrd.scm
@@ -439,9 +439,12 @@ UNIONFS."
;; We want read-write /dev nodes.
(make-essential-device-nodes #:root "/rw-root")
- ;; Make /root a union of the tmpfs and the actual root.
+ ;; Make /root a union of the tmpfs and the actual root. Use
+ ;; 'max_files' to set a high RLIMIT_NOFILE for the unionfs process
+ ;; itself. Failing to do that, we quickly run out of file
+ ;; descriptors; see <http://bugs.gnu.org/17827>.
(unless (zero? (system* unionfs "-o"
- "cow,allow_other,use_ino,suid,dev"
+ "cow,allow_other,use_ino,suid,dev,max_files=65536"
"/rw-root=RW:/real-root=RO"
"/root"))
(error "unionfs failed"))