On Fri, Sep 14, 2018 at 01:49:51PM +0200, Valentin Vidic wrote:
On Thu, Sep 13, 2018 at 05:08:00PM +0200, Roger Pau Monné wrote:
So I have the following patch which I think might solve your issues while keeping the reset logic working. Would you mind giving it a try with your use case and pvgrub?
Thanks for the patch. It seems to be having some problems with pvgrub: machines don't boot past pvgrub and they are using 100% CPU. Also in dom0 xenstored is usind 100% CPU - strace reports it is looping in this:
read(26, "\\240\0\0", 4) = 4 read(26, "\0\0\0\0L\0\0\0)\0\0\0\35\0\0\0+\\232`\231\31\1&", 24) = 24 read(26, "/local/domain/0/backend/vbd/1/51712/state", 41) = 41 read(26, "\2\0\0\0\1\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\1\0\0\0\1\0\0\0004", 29) = 29 read(26, "\0\330\0\0", 4) = 4 read(26, "\0\0\0\0L\0\0\0)\0\0\0\35\0\0\0+\JG\231\31\1&", 24) = 24 read(26, "/local/domain/0/backend/vbd/2/51712/state", 41) = 41 read(26, "\2\0\0\0\1\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\2\0\0\0\1\0\0\0004", 29) = 29 read(26, "\0\200\1\0", 4) = 4 read(26, "\0\0\0\0L\0\0\0)\0\0\0\35\0\0\0+\Z\373\231\31\1&", 24) = 24 read(26, "/local/domain/0/backend/vbd/5/51712/state", 41) = 41 read(26, "\2\0\0\0\1\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\5\0\0\0\1\0\0\0004", 29) = 29 read(12, "\321\1\0\0", 4) = 4 write(12, "\321\1\0\0", 4) = 4
I see the issue, blkfront in pvgrub is waiting for the backend to switch to Closed state before booting the OS kernel, so my fix is not going to work. I guess I will have to find a proper way to switch to Closed state.
Thanks, Roger.