Date: Sun, 7 Oct 2018 20:40:23 -0300 From: carlos antonio neira bustos <cneirabustos@gmail.com> To: kostikbel@gmail.com Cc: freebsd-hackers@freebsd.org Subject: Re: vm statistics per jail Message-ID: <CACiB22ighqq2k=C5mJQHc5_h8oAJ88DJYMVnrVzZGj2rmsK0RQ@mail.gmail.com> In-Reply-To: <20181007094150.GY5335@kib.kiev.ua> References: <CACiB22g=S8X9aqqFLUWkiUYozV0e8mtQoguunO9nb0b6FmLfjg@mail.gmail.com> <20181007094150.GY5335@kib.kiev.ua>
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Thanks, Konstantin, So that means that for a vm_page_t object the cred member from a vm_object_t in the vm_page_t will never have it cr_prison struct pointing to a jail? Is there a method to associate a vm_page_t to a jail ? as vm_object contains a cred member I thought I could use that. Bests On Sun, Oct 7, 2018 at 6:42 AM Konstantin Belousov <kostikbel@gmail.com> wrote: > On Sun, Oct 07, 2018 at 01:20:50AM -0300, carlos antonio neira bustos > wrote: > > Hello, Hackers, > > > > I have added mib member vm.vmtotal to be part of a prison with the > intent > > that each jail could report the correct memory usage using their vm > > counters. > > Unfortunately for me, I found that t_free depends on the global vmmeter > > counters, so I'm trying to add those as well to the prison struct, that > > will make consumers of those counters to report the correct information > > inside a jail. > > The problem so far trying to add vmeter is when I'm trying to determine > to > > which jail a vm_page_t belongs to using vm_pages_t's object cred struct > I'm > > getting a kernel panic due to a page fault. > > I have modified vm_phys_freecnt_adj(vm_page_t m, int adj) from > > /usr/src/sys/vm/vm_phys.h to increment the vmeter.v_free_count on the > > cr_prison that's belongs to vm_page_t. > > The panic does not produce a dump, so I'm unable to debug the fault. > > My rc.conf contains dumpdev="AUTO" so I think it should produce a dump or > > could it be that the panic happens to early? > > Is it possible to obtain to which cr_prison a vm_page_t belongs to ?. > > No. vm_page_t does not belong to a jail. >
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