Messages in this thread Patch in this message |  | | Date | Sun, 9 Jun 1996 21:43:36 -0700 (PDT) | From | Chad Page <> | Subject | Re: ramdisk problem |
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On Sat, 8 Jun 1996, Albert Cahalan wrote:
> Something changed the ramdisk behavior from 1.3.93 to 1.99.12. > > In Linux 1.3.93, this works fine: > dd if=/dev/zero of=/dev/ram0 bs=1k count=1 > But 1.3.93 seems to have a limit of 2880 kB. > kernel: end_request: I/O error, dev 01:00, sector 5760 > I think it's 4MB now by default - it changed somewhere in the 1.3.9x kernels IIRC.
> In Linux 1.99.12, writes to /dev/ram0 won't work at all. > kernel: end_request: I/O error, dev 01:00, sector 0 > > The device is correct according to the device list, /proc tells me > that it is in the kernel, I'm not out of ram, I do have permission > to write to the device... What happened? > Are you running it as a module? I'm having no problems on this end (although I have another bug report), and I can't track down why it wouldn't work... it's failing at sector 8192 as it should.
(I used 1.99.14 and 2.0.0 to test it though...)
My suspiscion is that as a module, the ramdisk driver isn't initalizing the ramdisk size properly at all. The patch after the message should fix it (against 1.99.14) - although it's completely untested :)
(specifcally, rd_size is being corrupted somehow...)
- Chad
--- rd.c.orig Fri Jun 7 19:27:31 1996 +++ rd.c Fri Jun 7 19:29:31 1996 @@ -295,8 +295,9 @@ int init_module(void) { - int error = rd_init(); - if (!error) + rd_size = 4096; /* Looks like this isn't preset in the module version */ + + if (rd_init()) printk(KERN_INFO "RAMDISK: Loaded as module.\n"); return error; }
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