[lkml]   [2001]   [Jun]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: VFS locking & HFS problems (2.4.6pre6)

On Fri, 29 Jun 2001, Benjamin Herrenschmidt wrote:

> The deadlock happen in the HFS filesystem in hfs_cat_put(), apparently
> (quickly looking at addresses) in spin_lock().

Uh-oh. Looks like hfs_cat_put() grabs some internal spinlock and calls
write_entry(). If it really is what its name implies, you are calling
a blocking function under the spinlock.

> So my question: Is there any document explaining the various locking
> requirements & re-entrency possibilities in a filesystem.

There is, but this bug has nothing fs-specific in it. You should never
block while holding a spinlock.

BTW, looks like 2.2 has the same bug.

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2005-03-22 12:55    [W:0.034 / U:3.004 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site