Ibstat dumps the current status only. It has nothing to do with hotplug. -----Original Message----- From: linux-rdma-owner@xxxxxxxxxxxxxxx <linux-rdma-owner@xxxxxxxxxxxxxxx> On Behalf Of Leon Romanovsky Sent: Thursday, February 27, 2020 2:50 PM To: Haim Boozaglo <haimbo@xxxxxxxxxxxx> Cc: Jason Gunthorpe <jgg@xxxxxxxx>; linux-rdma@xxxxxxxxxxxxxxx Subject: Re: "ibstat -l" displays CA device list in an unsorted order On Thu, Feb 27, 2020 at 09:48:45AM +0200, Haim Boozaglo wrote: > > > On 2/26/2020 7:09 PM, Jason Gunthorpe wrote: > > On Wed, Feb 26, 2020 at 03:57:49PM +0200, Leon Romanovsky wrote: > > > On Wed, Feb 26, 2020 at 09:43:10AM -0400, Jason Gunthorpe wrote: > > > > On Tue, Feb 25, 2020 at 10:25:49AM +0200, Haim Boozaglo wrote: > > > > > > > > > > > > > > > On 2/24/2020 9:41 PM, Jason Gunthorpe wrote: > > > > > > On Mon, Feb 24, 2020 at 08:06:56PM +0200, Haim Boozaglo wrote: > > > > > > > Hi all, > > > > > > > > > > > > > > When running "ibstat" or "ibstat -l", the output of CA > > > > > > > device list is displayed in an unsorted order. > > > > > > > > > > > > > > Before pull request #561, ibstat displayed the CA device > > > > > > > list sorted in alphabetical order. > > > > > > > > > > > > > > The problem is that users expect to have the output sorted > > > > > > > in alphabetical order and now they get it not as expected (in an unsorted order). > > > > > > > > > > > > Really? Why? That doesn't look like it should happen, the > > > > > > list is constructed out of readdir() which should be sorted? > > > > > > > > > > > > Do you know where this comes from? > > > > > > > > > > > > Jason > > > > > > > > > > > > > > > > readdir() gives us struct by struct and doesn't keep on alphabetical order. > > > > > Before pull request #561 ibstat have used this API of libibumad: > > > > > int umad_get_cas_names(char cas[][UMAD_CA_NAME_LEN], int max) > > > > > > > > > > This API used this function: > > > > > n = scandir(SYS_INFINIBAND, &namelist, NULL, alphasort); > > > > > > > > > > scandir() can return a sorted CA device list in alphabetical order. > > > > > > > > Oh what a weird unintended side effect. > > > > > > > > Resolving it would require adding a sorting pass on a linked > > > > list.. Will you try? > > > > > > Please be aware that once ibstat will be converted to netlink, the > > > order will change again. > > > > This is why I suggest a function to sort the linked list that tools > > needing sorted order can call. Then it doesn't matter how we got the > > list > > > > Jason > > > > I can just sort the list at the time of insertion of each node. Will you "resort" your list in the hotplug event? Thanks > > Haim.
