Re: [RFC PATCH] sunrpc: do not allow process to freeze within RPC state machine

2016-08-04 Thread Cyrill Gorcunov
On Wed, Aug 03, 2016 at 08:54:50PM +0400, Stanislav Kinsburskiy wrote: > Otherwise freezer cgroup state might never become "FROZEN". > > Here is a deadlock scheme for 2 processes in one freezer cgroup, which is > freezing: > > CPU 0 CPU 1 >

Re: [RFC PATCH] sunrpc: do not allow process to freeze within RPC state machine

2016-08-04 Thread Stanislav Kinsburskiy
03.08.2016 19:36, Jeff Layton пишет: On Wed, 2016-08-03 at 20:54 +0400, Stanislav Kinsburskiy wrote: Otherwise freezer cgroup state might never become "FROZEN". Here is a deadlock scheme for 2 processes in one freezer cgroup, which is freezing: CPU 0 CPU 1 -

Re: [RFC PATCH] sunrpc: do not allow process to freeze within RPC state machine

2016-08-04 Thread Stanislav Kinsburskiy
04.08.2016 15:16, Jeff Layton пишет: On Thu, 2016-08-04 at 12:55 +0200, Stanislav Kinsburskiy wrote: 03.08.2016 19:36, Jeff Layton пишет: On Wed, 2016-08-03 at 20:54 +0400, Stanislav Kinsburskiy wrote: Otherwise freezer cgroup state might never become "FROZEN". Here is a deadlock scheme for

Re: [RFC PATCH] sunrpc: do not allow process to freeze within RPC state machine

2016-08-04 Thread Jeff Layton
On Thu, 2016-08-04 at 12:55 +0200, Stanislav Kinsburskiy wrote: > > 03.08.2016 19:36, Jeff Layton пишет: > > > > On Wed, 2016-08-03 at 20:54 +0400, Stanislav Kinsburskiy wrote: > > > > > > Otherwise freezer cgroup state might never become "FROZEN". > > > > > > Here is a deadlock scheme for 2 pr

[RFC PATCH] sunrpc: do not allow process to freeze within RPC state machine

2016-08-03 Thread Stanislav Kinsburskiy
Otherwise freezer cgroup state might never become "FROZEN". Here is a deadlock scheme for 2 processes in one freezer cgroup, which is freezing: CPU 0 CPU 1 do_last inode_lock(dir->d_inode) vfs_create nfs_create ...

Re: [RFC PATCH] sunrpc: do not allow process to freeze within RPC state machine

2016-08-03 Thread Chuck Lever
> On Aug 3, 2016, at 1:36 PM, Jeff Layton wrote: > > On Wed, 2016-08-03 at 20:54 +0400, Stanislav Kinsburskiy wrote: >> Otherwise freezer cgroup state might never become "FROZEN". >> >> Here is a deadlock scheme for 2 processes in one freezer cgroup, >> which is >> freezing: >> >> CPU 0

Re: [RFC PATCH] sunrpc: do not allow process to freeze within RPC state machine

2016-08-03 Thread Jeff Layton
On Wed, 2016-08-03 at 20:54 +0400, Stanislav Kinsburskiy wrote: > Otherwise freezer cgroup state might never become "FROZEN". > > Here is a deadlock scheme for 2 processes in one freezer cgroup, > which is > freezing: > > CPU 0   CPU 1 >