On Tue, Aug 11, 2020 at 02:47:03PM +0000, David Laight wrote: > From: Andi Kleen > > On Mon, Aug 10, 2020 at 10:36:32PM +0200, Peter Zijlstra wrote: > > > On Mon, Aug 10, 2020 at 07:45:18AM -0700, Andi Kleen wrote: > > > > > > > Unfortunately we're kind of stuck with the old NFILE=1024 default > > > > even though it makes little sense on modern servers. > > > > > > Why can't that be changed? It seems to me all of userspace changes all > > > the time; heck that system-doofus thing flushed 20+ years of sysadmin > > > experience down the drain, just cause. Why can't we up a file limit? > > > > We could try, but I believe it's hard coded in various places outside > > the kernel. > > The place it really bites is select(). > Although the kernel supports large bitmaps glibc doesn't. > The random bit overwrites are a PITA to debug.
Good point. I remember I asked for a simple define to increase like glibc5 had, but they still didn't implement that. -Andi