Re: [RESEND] [PATCH] eventfs: Have inodes have unique inode numbers
From: Steven Rostedt <rostedt@goodmis.org>
Date: 2024-01-26 21:27:27
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On Fri, 26 Jan 2024 15:24:17 -0500 Mathieu Desnoyers [off-list ref] wrote:
On 2024-01-26 15:12, Steven Rostedt wrote: [...]quoted
diff --git a/fs/tracefs/inode.c b/fs/tracefs/inode.c index e1b172c0e091..2187be6d7b23 100644 --- a/fs/tracefs/inode.c +++ b/fs/tracefs/inode.c@@ -223,13 +223,41 @@ static const struct inode_operations tracefs_file_inode_operations = { .setattr = tracefs_setattr, }; +/* Copied from get_next_ino() but adds allocation for multiple inodes */ +#define LAST_INO_BATCH 1024 +#define LAST_INO_MASK (~(LAST_INO_BATCH - 1)) +static DEFINE_PER_CPU(unsigned int, last_ino); + +unsigned int tracefs_get_next_ino(int files) +{ + unsigned int *p = &get_cpu_var(last_ino); + unsigned int res = *p; + +#ifdef CONFIG_SMP + /* Check if adding files+1 overflows */How does it handle a @files input where: * (files+1 > LAST_INO_BATCH) ? * (files+1 == LAST_INO_BATCH) ?
Well, this is moot anyway, as Linus hates it. -- Steve