Hi Folks, Sorry if already known. Here is oops I've got on test9-pre7. Not sure what triggered this. As usual when I install new test kernel I do silly simple stress stuff : hdparm -t /dev/sdaX or /dev/hdaX (couple of times) memspeed 150(megs) 10(times) (swaper and mem stress) tcpspeed and udpspeed on loopback (net code stress) And then after a while (1-5 mins) I've started getting crashes, they all looked the same. That's Compaq PIII/124/Adaptec2940/EEpro100(module)/USB (module). 2.4.0-test8 works just fine. So, one of the crashes: Unable to handle kernel NULL pointer dereference at virtual address 00000009 c0139902 *pde = 00000000 Oops: 0000 CPU: 0 EIP: 0010:[<c0139902>] Using defaults from ksymoops -t elf32-i386 -a i386 EFLAGS: 00010246 eax: 00000009 ebx: 00000000 ecx: 0000000d edx: 00000001 esi: 00000000 edi: 00000000 ebp: 00000009 esp: c73ebf08 ds: 0018 es: 0018 ss: 0018 Process login (pid: 655, stackpage=c73eb000) Stack: c73ea000 00000000 00000001 00000000 0000000d 0000000f c0139a33 00000001 00000009 c73ebf48 c73ebf4c c73ea000 00000001 00000001 00000000 c73ea000 00000000 00000000 c0139ca3 00000001 00000000 00000001 c7dd4660 c73ebfb8 Call Trace: [<c0139a33>] [<c0139ca3>] [<c0118a6e>] [<c0108d3f>] Code: 8b 45 00 85 c0 7c 59 e8 9a 25 ff ff 89 c6 bb 20 00 00 00 85 >>EIP; c0139902 <do_pollfd+2e/b4> <===== Trace; c0139a33 <do_poll+ab/e8> Trace; c0139ca3 <sys_poll+233/350> Trace; c0118a6e <do_softirq+4e/74> Trace; c0108d3f <system_call+33/38> Code; c0139902 <do_pollfd+2e/b4> 00000000 <_EIP>: Code; c0139902 <do_pollfd+2e/b4> <===== 0: 8b 45 00 mov 0x0(%ebp),%eax <===== Code; c0139905 <do_pollfd+31/b4> 3: 85 c0 test %eax,%eax Code; c0139907 <do_pollfd+33/b4> 5: 7c 59 jl 60 <_EIP+0x60> c0139962 <do_pollfd+8e/b4> Code; c0139909 <do_pollfd+35/b4> 7: e8 9a 25 ff ff call ffff25a6 <_EIP+0xffff25a6> c012bea8 <fget+0/28> Code; c013990e <do_pollfd+3a/b4> c: 89 c6 mov %eax,%esi Code; c0139910 <do_pollfd+3c/b4> e: bb 20 00 00 00 mov $0x20,%ebx Code; c0139915 <do_pollfd+41/b4> 13: 85 00 test %eax,(%eax) Max P.S. CC replies please I'm not on the list. Maksim Krasnyanskiy Senior Kernel Engineer Qualcomm Incorporated [EMAIL PROTECTED] (408) 557-1092 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] Please read the FAQ at http://www.tux.org/lkml/