Re: [Qemu-devel] [PATCH] qed: do not evict in-use L2 table cache entries

2012-03-05 Thread Stefan Hajnoczi
On Thu, Mar 1, 2012 at 4:58 PM, Kevin Wolf wrote: > Am 01.03.2012 17:22, schrieb Stefan Hajnoczi: >> On Thu, Mar 01, 2012 at 05:10:57PM +0100, Kevin Wolf wrote: >>> Am 27.02.2012 14:16, schrieb Stefan Hajnoczi: The L2 table cache reduces QED metadata reads that would be required when tra

Re: [Qemu-devel] [PATCH] qed: do not evict in-use L2 table cache entries

2012-03-01 Thread Kevin Wolf
Am 01.03.2012 17:22, schrieb Stefan Hajnoczi: > On Thu, Mar 01, 2012 at 05:10:57PM +0100, Kevin Wolf wrote: >> Am 27.02.2012 14:16, schrieb Stefan Hajnoczi: >>> The L2 table cache reduces QED metadata reads that would be required >>> when translating LBAs to offsets into the image file. Since requ

Re: [Qemu-devel] [PATCH] qed: do not evict in-use L2 table cache entries

2012-03-01 Thread Stefan Hajnoczi
On Thu, Mar 01, 2012 at 05:10:57PM +0100, Kevin Wolf wrote: > Am 27.02.2012 14:16, schrieb Stefan Hajnoczi: > > The L2 table cache reduces QED metadata reads that would be required > > when translating LBAs to offsets into the image file. Since requests > > execute in parallel it is possible to sh

Re: [Qemu-devel] [PATCH] qed: do not evict in-use L2 table cache entries

2012-03-01 Thread Kevin Wolf
Am 27.02.2012 14:16, schrieb Stefan Hajnoczi: > The L2 table cache reduces QED metadata reads that would be required > when translating LBAs to offsets into the image file. Since requests > execute in parallel it is possible to share an L2 table between multiple > requests. > > There is a potenti

Re: [Qemu-devel] [PATCH] qed: do not evict in-use L2 table cache entries

2012-03-01 Thread Benoît Canet
Tested-by: Benoît Canet On Mon, Feb 27, 2012 at 2:16 PM, Stefan Hajnoczi < stefa...@linux.vnet.ibm.com> wrote: > The L2 table cache reduces QED metadata reads that would be required > when translating LBAs to offsets into the image file. Since requests > execute in parallel it is possible to sh

Re: [Qemu-devel] [PATCH] qed: do not evict in-use L2 table cache entries

2012-03-01 Thread Stefan Hajnoczi
On Mon, Feb 27, 2012 at 1:16 PM, Stefan Hajnoczi wrote: > The L2 table cache reduces QED metadata reads that would be required > when translating LBAs to offsets into the image file.  Since requests > execute in parallel it is possible to share an L2 table between multiple > requests. > > There is

[Qemu-devel] [PATCH] qed: do not evict in-use L2 table cache entries

2012-02-27 Thread Stefan Hajnoczi
The L2 table cache reduces QED metadata reads that would be required when translating LBAs to offsets into the image file. Since requests execute in parallel it is possible to share an L2 table between multiple requests. There is a potential data corruption issue when an in-use L2 table is evicte