Messages in this thread | | | Date | Thu, 6 Sep 2007 18:05:24 +0530 (IST) | From | Satyam Sharma <> | Subject | Re: WARNING native_smp_call_function mask 2.6.22.6 SMP on Single CPU System |
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On Thu, 6 Sep 2007, Michael Stiller wrote:
> Hi, > > i get the following warning if i call vfree some memory allocated by > vmalloc on a single cpu machine running 2.6.22.6 SMP: > > WARNING: at arch/i386/kernel/smp.c:559 native_smp_call_function_mask() > [<c010e77c>] native_smp_call_function_mask+0x145/0x14a > [<c01cb32d>] idr_remove+0x102/0x163 > [<c010e43f>] do_flush_tlb_all+0x0/0x59 > [<c010e43f>] do_flush_tlb_all+0x0/0x59 > [<c010ea33>] smp_call_function+0x1c/0x29 > [<c0120922>] on_each_cpu+0x18/0x29 > [<c010e2e9>] flush_tlb_all+0x1b/0x1f > [<c0155227>] remove_vm_area+0x4c/0x59 > [<c0155252>] __vunmap+0x1e/0xe5 > [<c011ccb7>] printk+0x1b/0x1f > [<e0b15f21>] ring_release+0x1f7/0x28a [ring]
There's no ring_release() in 2.6.22 -- at least doesn't show up in a grep.
> [<c0247305>] sock_fasync+0x99/0x146 > [<c024826b>] sock_release+0x14/0x66 > [<c02486a8>] sock_close+0x1e/0x38 > [<c01600ee>] __fput+0x99/0x166 > [<c015db9f>] filp_close+0x3e/0x62 > [<c015ebf0>] sys_close+0x5f/0x9e > [<c0103dba>] syscall_call+0x7/0xb > ======================= > > I use the rvmalloc / rvfree functions copied from usbvideo.c: > > static void rvfree(void *mem, unsigned long size) > { > unsigned long adr; > unsigned long pages = 0; > > #if defined(RING_DEBUG) > printk("RING: rvfree: %lu bytes\n", size); > #endif > > if (!mem) > return; > > adr = (unsigned long) mem; > while ((long) size > 0) { > ClearPageReserved(vmalloc_to_page((void *)adr)); > pages++; > adr += PAGE_SIZE; > size -= PAGE_SIZE; > } > #if defined(RING_DEBUG) > printk("RING: rvfree: %lu pages\n", pages); > printk("RING: rvfree: calling vfree....\n"); > #endif > vfree(mem); // WARNING occurs here > printk("RING: rvfree: after vfree....\n"); > } > > > Any clues?
You can't call vfree() with irqs disabled. Looks like you called ring_release() / rvfree() that way ... - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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