Messages in this thread | | | Date | Tue, 10 Apr 2007 08:09:55 +0200 | From | "Torsten Kaiser" <> | Subject | Re: init's children list is long and slows reaping children. |
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On 4/10/07, Andrew Morton <akpm@linux-foundation.org> wrote: > : root 299 0.0 0.0 0 0 ? S 18:51 0:00 [scsi_eh_0] > : root 300 0.0 0.0 0 0 ? S 18:51 0:00 [scsi_eh_1] > : root 305 0.0 0.0 0 0 ? S 18:51 0:00 [scsi_eh_2] > : root 306 0.0 0.0 0 0 ? S 18:51 0:00 [scsi_eh_3] > > This machine has one CPU, one sata disk and one DVD drive. The above is > hard to explain.
One thread per port, not per device.
796 ? S 0:00 \_ [scsi_eh_0] 797 ? S 0:00 \_ [scsi_eh_1] 798 ? S 0:00 \_ [scsi_eh_2] 819 ? S 0:00 \_ [scsi_eh_3] 820 ? S 0:00 \_ [scsi_eh_4] 824 ? S 0:00 \_ [scsi_eh_5] 825 ? S 0:14 \_ [scsi_eh_6]
bardioc ~ # lsscsi -d [0:0:0:0] disk ATA ST3160827AS 3.42 /dev/sda[8:0] [1:0:0:0] disk ATA ST3160827AS 3.42 /dev/sdb[8:16] [5:0:0:0] disk ATA IBM-DHEA-36480 HE8O /dev/sdc[8:32] [5:0:1:0] disk ATA Maxtor 6L160P0 BAH4 /dev/sdd[8:48] [6:0:0:0] cd/dvd HL-DT-ST DVDRAM GSA-4081B A100 /dev/sr0[11:0] bardioc ~ # lsscsi -H [0] sata_promise [1] sata_promise [2] sata_promise [3] sata_via [4] sata_via [5] pata_via [6] pata_via
The bad is, that there is always a thread, even if the hardware is not even hotplug capable. Don't know if the thread is even needed for hotplug...
> I don't think it's completely silly to object to all this. Sure, a kernel > thread is worth 4k in the best case, but I bet they have associated unused > resources and as we've seen, they can cause overhead.
For me its not the 4k that annoy me, but the clutter in ps or top.
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