Re: [PATCH] fs, ipc: Use an asynchronous version of kern_unmount in IPC

Do you have any additional concerns? On Thu, Feb 7, 2019 at 10:43 AM Salman Qazi wrote: > > On Wed, Feb 6, 2019 at 8:14 PM Al Viro wrote: > > > > On Wed, Feb 06, 2019 at 11:53:54AM -0800, Salman Qazi wrote: > > > > > This patch solves the issue by removing synchronize_rcu from mq_put_mnt. > > >

Re: [PATCH] fs, ipc: Use an asynchronous version of kern_unmount in IPC

On Wed, Feb 6, 2019 at 11:54 AM Salman Qazi wrote: > > Prior to this patch, the kernel can spend a lot of time with > this stack trace: > > [] __wait_rcu_gp+0x93/0xe0 > [] synchronize_sched+0x48/0x60 > [] kern_unmount+0x3a/0x46 > [] mq_put_mnt+0x15/0x17 > [] put_ipc_ns+0x36/0x8b > > This patch