Messages in this thread | | | Date | Tue, 15 Nov 2011 13:23:31 +0200 | Subject | Re: [Patch] tmpfs: add fallocate support | From | Pekka Enberg <> |
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Hello,
On Tue, Nov 15, 2011 at 10:42 AM, Amerigo Wang <amwang@redhat.com> wrote: > This patch adds fallocate support to tmpfs. I tested this patch > with the following test case, > > % sudo mount -t tmpfs -o size=100 tmpfs /mnt > % touch /mnt/foobar > % echo hi > /mnt/foobar > % fallocate -o 3 -l 5000 /mnt/foobar > fallocate: /mnt/foobar: fallocate failed: No space left on device > % fallocate -o 3 -l 3000 /mnt/foobar > % ls -l /mnt/foobar > -rw-rw-r-- 1 wangcong wangcong 3003 Nov 15 16:10 /mnt/foobar > % dd if=/dev/zero of=/mnt/foobar seek=3 bs=1 count=3000 > 3000+0 records in > 3000+0 records out > 3000 bytes (3.0 kB) copied, 0.0153224 s, 196 kB/s > % hexdump -C /mnt/foobar > 00000000 68 69 0a 00 00 00 00 00 00 00 00 00 00 00 00 00 |hi..............| > 00000010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| > * > 00000bb0 00 00 00 00 00 00 00 00 00 00 00 |...........| > 00000bbb > % cat /mnt/foobar > hi > > Signed-off-by: WANG Cong <amwang@redhat.com>
What's the use case for this?
Pekka -- 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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