Re: [GENERAL] PSA: XFS and Linux Cache Poisoning

2012-11-12 Thread Ben Chobot
On Nov 12, 2012, at 7:37 AM, Shaun Thomas wrote: > Hey everyone, > > We recently got bit by this, and I wanted to make sure it was known to the > general community. > > In new(er) Linux kernels, including late versions of the 2.6 tree, XFS has > introduced dynamic speculative preallocation. Wh

[GENERAL] PSA: XFS and Linux Cache Poisoning

2012-11-12 Thread Shaun Thomas
Hey everyone, We recently got bit by this, and I wanted to make sure it was known to the general community. In new(er) Linux kernels, including late versions of the 2.6 tree, XFS has introduced dynamic speculative preallocation. What does this do? It was added to prevent filesystem fragmenta