tree 1f98cd9fab564b6df8869a60f36e82d5d20f14f3
parent 07e77dca8a1f17a724a9b7449f0ca02e70e9d057
author Miklos Szeredi <mszeredi@suse.cz> 1291749416 +0100
committer Miklos Szeredi <mszeredi@suse.cz> 1291749416 +0100

fuse: allow batching of FORGET requests

Terje Malmedal reports that a fuse filesystem with 32 million inodes
on a machine with lots of memory can take up to 30 minutes to process
FORGET requests when all those inodes are evicted from the icache.

To solve this, create a BATCH_FORGET request that allows up to about
8000 FORGET requests to be sent in a single message.

This request is only sent if userspace supports interface version 7.16
or later, otherwise fall back to sending individual FORGET messages.

Reported-by: Terje Malmedal <terje.malmedal@usit.uio.no>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>