Joonsoo Kim <iamjoonsoo.kim@xxxxxxx> writes: > On Wed, May 14, 2014 at 02:12:19PM +0530, Aneesh Kumar K.V wrote: >> Joonsoo Kim <iamjoonsoo.kim@xxxxxxx> writes: >> >> >> >> Another issue i am facing with the current code is the atomic allocation >> failing even with large number of CMA pages around. In my case we never >> reclaimed because large part of the memory is consumed by the page cache and >> for that, free memory check doesn't include at free_cma. I will test >> with this patchset and update here once i have the results. >> > > Hello, > > Could you elaborate more on your issue? > I can't completely understand your problem. > So your atomic allocation is movable? And although there are many free > cma pages, that request is fail? > non movable atomic allocations are failing because we don't have anything other than CMA pages left and kswapd is yet to catchup ? swapper/0: page allocation failure: order:0, mode:0x20 CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.10.23-1500.pkvm2_1.5.ppc64 #1 Call Trace: [c000000ffffcb610] [c000000000017330] .show_stack+0x130/0x200 (unreliable) [c000000ffffcb6e0] [c00000000087a8c8] .dump_stack+0x28/0x3c [c000000ffffcb750] [c0000000001e06f0] .warn_alloc_failed+0x110/0x160 [c000000ffffcb800] [c0000000001e5984] .__alloc_pages_nodemask+0x9d4/0xbf0 [c000000ffffcb9e0] [c00000000023775c] .alloc_pages_current+0xcc/0x1b0 [c000000ffffcba80] [c0000000007098d4] .__netdev_alloc_frag+0x1a4/0x1d0 [c000000ffffcbb20] [c00000000070d750] .__netdev_alloc_skb+0xc0/0x130 [c000000ffffcbbb0] [d000000009639b40] .tg3_poll_work+0x900/0x1110 [tg3] [c000000ffffcbd10] [d00000000963a3a4] .tg3_poll_msix+0x54/0x200 [tg3] [c000000ffffcbdb0] [c00000000071fcec] .net_rx_action+0x1dc/0x310 [c000000ffffcbe90] [c0000000000c1b08] .__do_softirq+0x158/0x330 [c000000ffffcbf90] [c000000000025744] .call_do_softirq+0x14/0x24 [c000000ffffc7e00] [c000000000011684] .do_softirq+0xf4/0x130 [c000000ffffc7e90] [c0000000000c1f18] .irq_exit+0xc8/0x110 [c000000ffffc7f10] [c000000000011258] .__do_irq+0xc8/0x1f0 [c000000ffffc7f90] [c000000000025768] .call_do_irq+0x14/0x24 [c00000000137b750] [c00000000001142c] .do_IRQ+0xac/0x130 [c00000000137b800] [c000000000002a64] hardware_interrupt_common+0x164/0x180 .... Node 0 DMA: 408*64kB (C) 408*128kB (C) 408*256kB (C) 408*512kB (C) 408*1024kB (C) 406*2048kB (C) 199*4096kB (C) 97*8192kB (C) 6*16384kB (C) = 3348992kB Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=16384kB Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=16777216kB meminfo details: MemTotal: 65875584 kB MemFree: 8001856 kB Buffers: 49330368 kB Cached: 178752 kB SwapCached: 0 kB Active: 28550464 kB Inactive: 25476416 kB Active(anon): 3771008 kB Inactive(anon): 767360 kB Active(file): 24779456 kB Inactive(file): 24709056 kB Unevictable: 15104 kB Mlocked: 15104 kB SwapTotal: 8384448 kB SwapFree: 8384448 kB Dirty: 0 kB -aneesh -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>