On Thu, Jul 22, 2010 at 12:54:57PM -0700, Dan Magenheimer wrote: > > From: Greg KH [mailto:greg@xxxxxxxxx] > > Sent: Thursday, July 22, 2010 1:15 PM > > To: Nitin Gupta > > Cc: Pekka Enberg; Hugh Dickins; Andrew Morton; Dan Magenheimer; Rik van > > Riel; Avi Kivity; Christoph Hellwig; Minchan Kim; Konrad Rzeszutek > > Wilk; linux-mm; linux-kernel > > Subject: Re: [PATCH 0/8] zcache: page cache compression support > > > > On Fri, Jul 16, 2010 at 06:07:42PM +0530, Nitin Gupta wrote: > > > Frequently accessed filesystem data is stored in memory to reduce > > access to > > > (much) slower backing disks. Under memory pressure, these pages are > > freed and > > > when needed again, they have to be read from disks again. When > > combined working > > > set of all running application exceeds amount of physical RAM, we get > > extereme > > > slowdown as reading a page from disk can take time in order of > > milliseconds. > > > > <snip> > > > > Given that there were a lot of comments and changes for this series, > > can > > you resend them with your updates so I can then apply them if they are > > acceptable to everyone? > > > > thanks, > > greg k-h > > Hi Greg -- > > Nitin's zcache code is dependent on the cleancache series: > http://lkml.org/lkml/2010/6/21/411 Ah, I didn't realize that. Hm, that makes it something that I can't take until that code is upstream, sorry. > The cleancache series has not changed since V3 (other than > fixing a couple of documentation typos) and didn't receive any > comments other than Christoph's concern that there weren't > any users... which I think has been since addressed with the > posting of the Xen tmem driver code and Nitin's zcache. > > If you are ready to apply the cleancache series, great! > If not, please let me know next steps so cleancache isn't > an impediment for applying the zcache series. I don't know, work with the kernel developers to resolve the issues they pointed out in the cleancache code and when it goes in, then I can take these patches. good luck, greg k-h -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>