Messages in this thread | | | From | Miklos Szeredi <> | Date | Wed, 24 Mar 2021 16:28:35 +0100 | Subject | Re: [fuse-devel] [PATCH] fuse: avoid deadlock when write fuse inode |
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On Tue, Feb 2, 2021 at 5:41 AM Huang Jianan via fuse-devel <fuse-devel@lists.sourceforge.net> wrote: > > We found the following deadlock situations in low memory scenarios: > Thread A Thread B > - __writeback_single_inode > - fuse_write_inode > - fuse_simple_request > - __fuse_request_send > - request_wait_answer > - fuse_dev_splice_read > - fuse_copy_fill > - __alloc_pages_direct_reclaim > - do_shrink_slab > - super_cache_scan > - shrink_dentry_list > - dentry_unlink_inode > - iput_final > - inode_wait_for_writeback
On what kernel are you seeing this?
I don't see how it can happen on upstream kernels, since there's a "write_inode_now(inode, 1)" call in fuse_release() and nothing can dirty the inode after the file has been released.
Thanks, Miklos
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