Re: [bisected] Re: local DoS - systemd hang or timeout (WAS: Re: [RFC][CFT] splice_read reworked)

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Wed, Oct 12, 2016 at 03:50:36PM -0400, CAI Qian wrote:
> 
> 
> ----- Original Message -----
> > From: "Dave Chinner" <david@xxxxxxxxxxxxx>
> > Sent: Monday, October 10, 2016 5:57:14 PM
> > 
> > > http://people.redhat.com/qcai/tmp/dmesg
> > 
> > It's a page lock order bug in the XFS seek hole/data implementation.
> So reverted this commit against the latest mainline allows trinity run
> hours. Otherwise, it always hang at fdatasync() within 30 minutes.
> 
> fc0561cefc04e7803c0f6501ca4f310a502f65b8
> xfs: optimise away log forces on timestamp updates for fdatasync

Has nothing at all to do with the hang.

> PS: tested against the vfs tree's #work.splice_read with this commit
> reverted is now hanging at sync() instead which won't be  reproduced
> against the mainline so far.
> http://people.redhat.com/qcai/tmp/dmesg-sync

It is the same page lock vs seek hole/data issue.

Cheers,

Dave.
-- 
Dave Chinner
david@xxxxxxxxxxxxx
--
To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html



[Index of Archives]     [Linux Ext4 Filesystem]     [Union Filesystem]     [Filesystem Testing]     [Ceph Users]     [Ecryptfs]     [AutoFS]     [Kernel Newbies]     [Share Photos]     [Security]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux Cachefs]     [Reiser Filesystem]     [Linux RAID]     [Samba]     [Device Mapper]     [CEPH Development]
  Powered by Linux