> -----Original Message----- > From: Vitaly Kuznetsov [mailto:vkuznets@xxxxxxxxxx] > Sent: Wednesday, March 25, 2015 11:02 AM > To: KY Srinivasan > Cc: Haiyang Zhang; devel@xxxxxxxxxxxxxxxxxxxxxx; linux- > kernel@xxxxxxxxxxxxxxx; Dexuan Cui > Subject: [PATCH 0/1] Drivers: hv: hv_balloon: do not online pages in offline > blocks > > Patch 1/1 is rather a hackaround. The root cause of the issue is the fact that > we're adding not fully backed memory blocks and allow to online them. It is > relatively easy to forbid that and add only fully backed 128Mb regions. The > whole > driver code will be much simpler: hv_bring_pgs_online() and > hv_online_page() > will go away, ha_region_mutex won't probably be required,... Please let me > know > if you think I should follow this way. Vitaly, The main issue I had to address here was that Windows has a 2M alignment for memory hot add while Linux has a 128M alignment requirement. Furthermore, we will also have to deal with the case where only a partial 128MB block might be hot-added. The strategy I chose of selectively onlining pages in a properly aligned block that would be hot added was to address the above two issues. Regards, K. Y > > Vitaly Kuznetsov (1): > Drivers: hv: hv_balloon: do not online pages in offline blocks > > drivers/hv/hv_balloon.c | 12 +++++++++++- > 1 file changed, 11 insertions(+), 1 deletion(-) > > -- > 1.9.3 _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
