Date: Sun, 7 Oct 2018 12:41:50 +0300 From: Konstantin Belousov <kostikbel@gmail.com> To: carlos antonio neira bustos <cneirabustos@gmail.com> Cc: freebsd-hackers@freebsd.org Subject: Re: vm statistics per jail Message-ID: <20181007094150.GY5335@kib.kiev.ua> In-Reply-To: <CACiB22g=S8X9aqqFLUWkiUYozV0e8mtQoguunO9nb0b6FmLfjg@mail.gmail.com> References: <CACiB22g=S8X9aqqFLUWkiUYozV0e8mtQoguunO9nb0b6FmLfjg@mail.gmail.com>
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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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