On Wed, Mar 19, 2014 at 12:20:08PM -0400, Chris Mason wrote: > On 03/19/2014 11:45 AM, Marc MERLIN wrote: > >My server died last night during a btrfs send/receive to a btrfs radi5 > >array > > > >Here are the logs. Is this anything known or with a possible workaround? > > > >Thanks, > >Marc > > > >btrfs-rmw-2: page allocation failure: order:1, mode:0x8020 > > This is an order 1 atomic allocation from the mvs driver, we really > should not be depending on that to get IO done. A quick search and it > looks like we're allocating MVS_SLOT_BUF_SZ (8192) bytes. > > You could try bumping the lowmem reserves.
Thanks for the info. So for now, I have CONFIG_X86_RESERVE_LOW=64 This is the option we're talking about, right? Should I double it? For now, I have the copy running again, and it's been going for 8 hours without failure on the old kernel but of course that doesn't mean my 2TB copy will complete without hitting the bug again. Thanks, Marc -- "A mouse is a device used to point at the xterm you want to type in" - A.S.R. Microsoft is to operating systems .... .... what McDonalds is to gourmet cooking Home page: http://marc.merlins.org/ -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html