Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > linux.kernel > #1610886
| From | Ilya Dryomov <idryomov@gmail.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH 4.4 48/76] libceph: force GFP_NOIO for socket allocations |
| Date | 2017-03-28 15:30 +0200 |
| Message-ID | <tpZmb-8cB-65@gated-at.bofh.it> (permalink) |
| References | <tpYzL-7we-3@gated-at.bofh.it> <tpYzM-7we-13@gated-at.bofh.it> <tpZ2O-83l-23@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Tue, Mar 28, 2017 at 2:43 PM, Michal Hocko <mhocko@kernel.org> wrote:
> On Tue 28-03-17 14:30:45, Greg KH wrote:
>> 4.4-stable review patch. If anyone has any objections, please let me know.
>
> I haven't seen the original patch but the changelog makes me worried.
> How exactly this is a problem? Where do we lockup? Does rbd/libceph take
> any xfs locks?
No, it doesn't. This is just another instance of "using GFP_KERNEL on
the writeback path may lead to a deadlock" with nothing extra to it.
XFS is writing out data, libceph messenger worker tries to open
a socket and recurses back into XFS because the sockfs inode is
allocated with GFP_KERNEL. The message with some of the data never
goes out and eventually we get a deadlock.
I've only included the offending stack trace. I guess I should have
stressed that ceph-msgr workqueue is used for reclaim.
Thanks,
Ilya
Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
[PATCH 4.4 48/76] libceph: force GFP_NOIO for socket allocations Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-28 14:40 +0200
Re: [PATCH 4.4 48/76] libceph: force GFP_NOIO for socket allocations Michal Hocko <mhocko@kernel.org> - 2017-03-28 15:10 +0200
Re: [PATCH 4.4 48/76] libceph: force GFP_NOIO for socket allocations Ilya Dryomov <idryomov@gmail.com> - 2017-03-28 15:30 +0200
Re: [PATCH 4.4 48/76] libceph: force GFP_NOIO for socket allocations Michal Hocko <mhocko@kernel.org> - 2017-03-28 15:40 +0200
Re: [PATCH 4.4 48/76] libceph: force GFP_NOIO for socket allocations Ilya Dryomov <idryomov@gmail.com> - 2017-03-29 11:30 +0200
Re: [PATCH 4.4 48/76] libceph: force GFP_NOIO for socket allocations Michal Hocko <mhocko@kernel.org> - 2017-03-29 12:50 +0200
Re: [PATCH 4.4 48/76] libceph: force GFP_NOIO for socket allocations Michal Hocko <mhocko@kernel.org> - 2017-03-29 13:00 +0200
Re: [PATCH 4.4 48/76] libceph: force GFP_NOIO for socket allocations Ilya Dryomov <idryomov@gmail.com> - 2017-03-29 13:20 +0200
Re: [PATCH 4.4 48/76] libceph: force GFP_NOIO for socket allocations Michal Hocko <mhocko@kernel.org> - 2017-03-29 13:20 +0200
Re: [PATCH 4.4 48/76] libceph: force GFP_NOIO for socket allocations Ilya Dryomov <idryomov@gmail.com> - 2017-03-29 16:30 +0200
Re: [PATCH 4.4 48/76] libceph: force GFP_NOIO for socket allocations Michal Hocko <mhocko@kernel.org> - 2017-03-30 08:30 +0200
Re: [PATCH 4.4 48/76] libceph: force GFP_NOIO for socket allocations Ilya Dryomov <idryomov@gmail.com> - 2017-03-30 12:10 +0200
Re: [PATCH 4.4 48/76] libceph: force GFP_NOIO for socket allocations Michal Hocko <mhocko@kernel.org> - 2017-03-30 13:30 +0200
Re: [PATCH 4.4 48/76] libceph: force GFP_NOIO for socket allocations Ilya Dryomov <idryomov@gmail.com> - 2017-03-30 15:50 +0200
Re: [PATCH 4.4 48/76] libceph: force GFP_NOIO for socket allocations Michal Hocko <mhocko@kernel.org> - 2017-03-30 16:40 +0200
Re: [PATCH 4.4 48/76] libceph: force GFP_NOIO for socket allocations Ilya Dryomov <idryomov@gmail.com> - 2017-03-30 17:10 +0200
Re: [PATCH 4.4 48/76] libceph: force GFP_NOIO for socket allocations Michal Hocko <mhocko@kernel.org> - 2017-03-30 18:20 +0200
Re: [PATCH 4.4 48/76] libceph: force GFP_NOIO for socket allocations Ilya Dryomov <idryomov@gmail.com> - 2017-03-30 19:30 +0200
Re: [PATCH 4.4 48/76] libceph: force GFP_NOIO for socket allocations Michal Hocko <mhocko@kernel.org> - 2017-03-30 20:50 +0200
Re: [PATCH 4.4 48/76] libceph: force GFP_NOIO for socket allocations Ilya Dryomov <idryomov@gmail.com> - 2017-03-30 16:00 +0200
Re: [PATCH 4.4 48/76] libceph: force GFP_NOIO for socket allocations Michal Hocko <mhocko@kernel.org> - 2017-03-30 16:10 +0200
Re: [PATCH 4.4 48/76] libceph: force GFP_NOIO for socket allocations Brian Foster <bfoster@redhat.com> - 2017-03-29 13:10 +0200
Re: [PATCH 4.4 48/76] libceph: force GFP_NOIO for socket allocations Ilya Dryomov <idryomov@gmail.com> - 2017-03-29 13:20 +0200
Re: [PATCH 4.4 48/76] libceph: force GFP_NOIO for socket allocations Michal Hocko <mhocko@kernel.org> - 2017-03-29 13:30 +0200
Re: [PATCH 4.4 48/76] libceph: force GFP_NOIO for socket allocations Brian Foster <bfoster@redhat.com> - 2017-03-29 14:00 +0200
Re: [PATCH 4.4 48/76] libceph: force GFP_NOIO for socket allocations Ilya Dryomov <idryomov@gmail.com> - 2017-03-29 16:40 +0200
csiph-web