On Wed, 19 Jul 2017, Milan Broz wrote: > On 07/19/2017 05:39 PM, Mike Snitzer wrote: > > On Wed, Jul 19 2017 at 11:30P -0400, > > Mikulas Patocka <mpatocka@xxxxxxxxxx> wrote: > > > >> Hi Mike > >> > >> Some times ago, I sent this patch as dm-bufio optimization (it doesn't > >> have to write full buffers, it only writes a part of the buffer that > >> changed). You delayed the patch until the next kernel. > >> > >> Will you submit the patch to the current kernel? > > > > Sorry about that. It obviously fell off my radar. > > > > I'll review it and see if I can make the justification for it going into > > 4.13-rc2. But unfortunately the 4.13 merge window closed this past > > Sunday when Linus released v4.13-rc1 > > > > I'll let you know though, thanks. > > Just FYI: I am just running some tests with the stack space fix and > this patch and the performance improvement for 4k sectors is really big > (compared to 4.12). It would be nice if both patches hits 4.13... > > Milan That journal allocation bugfix should definitely go to the stable 4.12 branch. The plug fix may or may not be backported, it provides about 60% performance improvement on specific write patterns (if you write this sequence of bytes with O_DIRECT 4096-8191,0-4095,12288-16383,8192-12287,20480-24575,16384-20479...). Mikulas -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
