> On Wed, 05 Sep 2007 03:28:07 +0200 Ian Kumlien <[EMAIL PROTECTED]> wrote: > Hi, > > I have just had a quite unexpected 'low memory situation'... > > This is a AMD64 machine with 2 gig memory, running 64 bit userland. > > Kernel: 2.6.23-rc3-git10, updating to -rc5-* as soon as i can. > I'm using SLUB:s > > > To me, this looks odd... I thought that any cached memory would be > reclamed but it was always full. > > Ideas? > > One example from dmesg: > swapper: page allocation failure. order:1, mode:0x4020 > > Call Trace: > <IRQ> [<ffffffff8026c7ef>] __alloc_pages+0x30f/0x330 > [<ffffffff8028a0a1>] __slab_alloc+0x141/0x590 > [<ffffffff805a5937>] __netdev_alloc_skb+0x17/0x40 > [<ffffffff805a5937>] __netdev_alloc_skb+0x17/0x40 > [<ffffffff8028b470>] __kmalloc_track_caller+0xa0/0xc0 > [<ffffffff805a4b3f>] __alloc_skb+0x6f/0x150 > [<ffffffff805a5937>] __netdev_alloc_skb+0x17/0x40 > [<ffffffff88010945>] :sky2:sky2_rx_alloc+0x25/0xf0 > [<ffffffff88013b0c>] :sky2:sky2_poll+0x6dc/0xcf0 > [<ffffffff805e5f60>] tcp_delack_timer+0x0/0x210 > [<ffffffff805ac38a>] net_rx_action+0x8a/0x140 > [<ffffffff80242ac9>] __do_softirq+0x69/0xe0 > [<ffffffff8020cd9c>] call_softirq+0x1c/0x30 > [<ffffffff8020eb75>] do_softirq+0x35/0x90 > [<ffffffff8020ede0>] do_IRQ+0x80/0x100 > [<ffffffff8020ad00>] default_idle+0x0/0x40 > [<ffffffff8020c121>] ret_from_intr+0x0/0xa > <EOI> [<ffffffff8020ad29>] default_idle+0x29/0x40 > [<ffffffff8020ade1>] cpu_idle+0xa1/0xf0 >
An order-1 GFP_ATOMIC allocation can fail, and networking should recover from it. If this is happening a lot then someting might have been broken. Do you have reason to believe that the frequency of this happening has inreased? - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/