Jan Engelhardt <[EMAIL PROTECTED]> wrote:
>
> >I wonder if it would be possible to somehow reclaim space that has
> >been previously reserved for a ramdisk without rebooting.
>
> free_ramdisk.c:
>
> #include <sys/ioctl.h>
> #include <sys/mount.h>
> #include <sys/stat.h>
> #include <sys/types.h>
> #include <errno.h>
> #include <fcntl.h>
> #include <stdio.h>
> #include <string.h>
> #include <unistd.h>
>
> int main(int argc, const char **argv) {
> int eax = 0;
> while(*argv != NULL) {
> int fd = open(*argv, O_RDWR);
> if(fd < 0) {
> fprintf(stderr, "Warning: Cannot open %s: %s\n",
> *argv, strerror(errno));
> if(eax == 0) { eax = errno; }
> continue;
> }
> ioctl(fd, BLKFLSBUF, 0);
> close(fd);
> ++argv;
> }
> return eax == 0;
> }
>
hmm, yes. That's a special-case in the ramdisk driver.
The command `blockdev --flushbufs /dev/ram0' should have the same effect.
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