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| author | silby <silby@FreeBSD.org> | 2003-06-18 18:57:58 +0000 |
|---|---|---|
| committer | silby <silby@FreeBSD.org> | 2003-06-18 18:57:58 +0000 |
| commit | 0d0a45a41b57e28acaf0d2182e18da074cb188d1 (patch) | |
| tree | 38235766c8173b7b6a2df3a0bda2222eec036cff /sys/kern/kern_descrip.c | |
| parent | 591f399cfea86c008e5908349bbd5137d370f450 (diff) | |
| download | FreeBSD-src-0d0a45a41b57e28acaf0d2182e18da074cb188d1.zip FreeBSD-src-0d0a45a41b57e28acaf0d2182e18da074cb188d1.tar.gz | |
Reserve the last 5% of file descriptors for root use. This should allow
systems to fail more gracefully when a file descriptor exhaustion situation
occurs.
Original patch by: David G. Andersen <dga@lcs.mit.edu>
PR: 45353
MFC after: 1 week
Diffstat (limited to 'sys/kern/kern_descrip.c')
| -rw-r--r-- | sys/kern/kern_descrip.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/sys/kern/kern_descrip.c b/sys/kern/kern_descrip.c index 4c21b8b..4651631 100644 --- a/sys/kern/kern_descrip.c +++ b/sys/kern/kern_descrip.c @@ -1192,13 +1192,14 @@ falloc(td, resultfp, resultfd) struct proc *p = td->td_proc; struct file *fp, *fq; int error, i; + int maxuserfiles = maxfiles - (maxfiles / 20); fp = uma_zalloc(file_zone, M_WAITOK | M_ZERO); sx_xlock(&filelist_lock); - if (nfiles >= maxfiles) { + if (((nfiles >= maxuserfiles) && (td->td_ucred->cr_ruid != 0)) + || (nfiles >= maxfiles)) { sx_xunlock(&filelist_lock); uma_zfree(file_zone, fp); - tablefull("file"); return (ENFILE); } nfiles++; |
