Messages in this thread | | | Date | Thu, 3 Jun 2021 14:56:12 +0200 | From | Michal Hocko <> | Subject | Re: [PATCH] [fuse] alloc_page nofs avoid deadlock |
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On Thu 03-06-21 20:41:05, chenguanyou wrote: > ABA deadlock > > PID: 17172 TASK: ffffffc0c162c000 CPU: 6 COMMAND: "Thread-21" > > PID: 9652 TASK: ffffffc0c9ce0000 CPU: 4 COMMAND: "kworker/u16:8"
Please be much more specific about the underlying issue and what the actual lock dependency during the reclaim is. The above is essentially void of any relevant information.
> Signed-off-by: chenguanyou <chenguanyou@xiaomi.com> > --- > fs/fuse/dev.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c > index c0fee830a34e..d36125ff0405 100644 > --- a/fs/fuse/dev.c > +++ b/fs/fuse/dev.c > @@ -721,7 +721,7 @@ static int fuse_copy_fill(struct fuse_copy_state *cs) > if (cs->nr_segs >= cs->pipe->max_usage) > return -EIO; > > - page = alloc_page(GFP_HIGHUSER); > + page = alloc_page(GFP_NOFS | __GFP_HIGHMEM); > if (!page) > return -ENOMEM; > > -- > 2.17.1
-- Michal Hocko SUSE Labs
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