Messages in this thread | | | Date | Tue, 27 Sep 2011 14:35:25 -0500 (CDT) | From | Christoph Lameter <> | Subject | Re: [PATCH 1/2] mm: restrict access to slab files under procfs and sysfs |
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On Tue, 27 Sep 2011, Vasiliy Kulikov wrote:
> On Tue, Sep 27, 2011 at 13:08 -0500, Christoph Lameter wrote: > > Possible candidates: > > > > christoph@oldy:~/n/linux-2.6$ grep proc_create mm/* > > mm/swapfile.c: proc_create("swaps", 0, NULL, &proc_swaps_operations); > > mm/vmstat.c: proc_create("buddyinfo", S_IRUGO, NULL, &fragmentation_file_operations); > > mm/vmstat.c: proc_create("pagetypeinfo", S_IRUGO, NULL, &pagetypeinfo_file_ops); > > mm/vmstat.c: proc_create("vmstat", S_IRUGO, NULL, &proc_vmstat_file_operations); > > mm/vmstat.c: proc_create("zoneinfo", S_IRUGO, NULL, &proc_zoneinfo_file_operations); > > > > vmstat and zoneinfo in particular give similar information to what is > > revealed through the slab proc files. > > Do you know whether these files are actively used? I don't want to > break tools like "free" or "top". In this case we'll have to discover > another way to limit this information.
top uses per process information. Tried an strace and I see no access to vmstat or zoneinfo.
free uses /proc/meminfo not vmstat or zoneinfo. Since you already have a patch that limits /proc/meminfo access there is already an issue there.
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