On Mon, 2010-02-22 at 10:42 -0500, Alan Stern wrote: > [You should use Reply-To-All so that your messages appear on the > mailing list.] > Sorry. > On Mon, 22 Feb 2010, nogradi wrote: > > > Thank You for your help. > > I think it is an error, because > > the Slab grows permanently after a > > plug_in/plug_out sequence. > > There's nothing wrong with that. Slab memory is allocated when the > kernel communicates with the USB devices, and it remains allocated for > use with the next device you plug in. > > > After an insmod/rmmod ohci_hcd.ko > > sequence Slab grows too.(with 16 kB). > I made the following test: (option.ko isn't loaded) cat /proc/meminfo MemTotal: 62048 kB MemFree: 54140 kB Buffers: 0 kB Cached: 2992 kB SwapCached: 0 kB Active: 1464 kB Inactive: 1912 kB SwapTotal: 0 kB SwapFree: 0 kB Dirty: 0 kB Writeback: 0 kB AnonPages: 404 kB Mapped: 868 kB Slab: 1696 kB SReclaimable: 388 kB SUnreclaim: 1308 kB PageTables: 72 kB NFS_Unstable: 0 kB Bounce: 0 kB CommitLimit: 31024 kB Committed_AS: 2716 kB VmallocTotal: 958464 kB VmallocUsed: 16752 kB while true do insmod ohci-hcd.ko sleep 20 rmmod ohci-hcd.ko sleep 3 done (I shot this script after rmmod down) cat /proc/meminfo MemTotal: 62048 kB MemFree: 52244 kB Buffers: 0 kB Cached: 3208 kB SwapCached: 0 kB Active: 1676 kB Inactive: 1916 kB SwapTotal: 0 kB SwapFree: 0 kB Dirty: 0 kB Writeback: 0 kB AnonPages: 404 kB Mapped: 868 kB Slab: 3372 kB SReclaimable: 1844 kB SUnreclaim: 1528 kB PageTables: 72 kB NFS_Unstable: 0 kB Bounce: 0 kB CommitLimit: 31024 kB Committed_AS: 2716 kB VmallocTotal: 958464 kB VmallocUsed: 16752 kB is it correct? Thank You for Your help, best regards Peter Nogradi > Please provide more details. Which slab grows? If you insmod/rmmod > ohci-hcd multiple times, does the slab grow some more each time? > > Alan Stern > > -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
