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fs: improve scalability of pseudo filesystems

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Regardless of how much we possibly try to scale dcache, there is likely
always going to be some fundamental contention when adding or removing children
under the same parent. Pseudo filesystems do not seem need to have connected
dentries because by definition they are disconnected.

Signed-off-by: Nick Piggin <[email protected]>
This commit is contained in:
Nick Piggin 2011-01-07 17:50:07 +11:00
commit 4b936885ab
5 changed files with 16 additions and 3 deletions
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2
fs/pipe.c
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@ -999,7 +999,7 @@ struct file *create_write_pipe(int flags)
goto err;
err = -ENOMEM;
path.dentry = d_alloc(pipe_mnt->mnt_sb->s_root, &name);
path.dentry = d_alloc_pseudo(pipe_mnt->mnt_sb, &name);
if (!path.dentry)
goto err_inode;
path.mnt = mntget(pipe_mnt);