From: Kent Overstreet <kent.overstreet@linux.dev>
To: Dave Chinner <david@fromorbit.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>,
linux-fsdevel@vger.kernel.org, linux-block@vger.kernel.org,
linux-cachefs@redhat.com, dhowells@redhat.com,
gfs2@lists.linux.dev, dm-devel@lists.linux.dev,
linux-security-module@vger.kernel.org, selinux@vger.kernel.org,
linux-kernel@vger.kernel.org,
Suren Baghdasaryan <surenb@google.com>
Subject: Re: [PATCH 03/11] vfs: Use dlock list for superblock's inode list
Date: Thu, 7 Dec 2023 00:03:51 -0500 [thread overview]
Message-ID: <20231207050351.gg74kg6jumik36gs@moria.home.lan> (raw)
In-Reply-To: <ZXFRHo3mcbKfoC8v@dread.disaster.area>
On Thu, Dec 07, 2023 at 03:59:10PM +1100, Dave Chinner wrote:
> On Thu, Dec 07, 2023 at 02:40:24AM +0000, Al Viro wrote:
> > On Wed, Dec 06, 2023 at 05:05:32PM +1100, Dave Chinner wrote:
> >
> > > @@ -303,6 +303,7 @@ static void destroy_unused_super(struct super_block *s)
> > > super_unlock_excl(s);
> > > list_lru_destroy(&s->s_dentry_lru);
> > > list_lru_destroy(&s->s_inode_lru);
> > > + free_dlock_list_heads(&s->s_inodes);
> > > security_sb_free(s);
> > > put_user_ns(s->s_user_ns);
> > > kfree(s->s_subtype);
> >
> > Umm... Who's going to do that on normal umount?
>
> Huh. So neither KASAN nor kmemleak has told me that s->s-inodes was
> being leaked. I'm guessing a rebase sometime in the past silently
> dropped a critical hunk from deactivate_locked_super() in the bit
> bucket, but as nothing since whenever that happened has failed or
> flagged a memory leak I didn't notice.
>
> Such great tools we have......
kmemleak has always seemed flakey to me (as one would expect, it's
difficult code to test). If we can ever get memory allocation profiling
merged - it won't be a direct replacement but it'll be more reliable.
next prev parent reply other threads:[~2023-12-07 5:03 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-12-06 6:05 [PATCH 0/11] vfs: inode cache scalability improvements Dave Chinner
2023-12-06 6:05 ` [PATCH 01/11] lib/dlock-list: Distributed and lock-protected lists Dave Chinner
2023-12-07 2:23 ` Al Viro
2023-12-06 6:05 ` [PATCH 02/11] vfs: Remove unnecessary list_for_each_entry_safe() variants Dave Chinner
2023-12-07 2:26 ` Al Viro
2023-12-07 4:18 ` Kent Overstreet
2023-12-06 6:05 ` [PATCH 03/11] vfs: Use dlock list for superblock's inode list Dave Chinner
2023-12-07 2:40 ` Al Viro
2023-12-07 4:59 ` Dave Chinner
2023-12-07 5:03 ` Kent Overstreet [this message]
2023-12-06 6:05 ` [PATCH 04/11] lib/dlock-list: Make sibling CPUs share the same linked list Dave Chinner
2023-12-07 4:31 ` Kent Overstreet
2023-12-07 5:42 ` Kent Overstreet
2023-12-07 6:25 ` Dave Chinner
2023-12-07 6:49 ` Al Viro
2023-12-06 6:05 ` [PATCH 05/11] selinux: use dlist for isec inode list Dave Chinner
2023-12-06 21:52 ` Paul Moore
2023-12-06 23:04 ` Dave Chinner
2023-12-07 0:36 ` Paul Moore
2023-12-06 6:05 ` [PATCH 06/11] vfs: factor out inode hash head calculation Dave Chinner
2023-12-07 3:02 ` Al Viro
2023-12-06 6:05 ` [PATCH 07/11] hlist-bl: add hlist_bl_fake() Dave Chinner
2023-12-07 3:05 ` Al Viro
2023-12-06 6:05 ` [PATCH 08/11] vfs: inode cache conversion to hash-bl Dave Chinner
2023-12-07 4:58 ` Kent Overstreet
2023-12-07 6:03 ` Dave Chinner
2023-12-07 6:42 ` Al Viro
2023-12-06 6:05 ` [PATCH 09/11] hash-bl: explicitly initialise hash-bl heads Dave Chinner
2023-12-07 3:15 ` Al Viro
2023-12-06 6:05 ` [PATCH 10/11] list_bl: don't use bit locks for PREEMPT_RT or lockdep Dave Chinner
2023-12-07 4:16 ` Kent Overstreet
2023-12-07 4:41 ` Dave Chinner
2023-12-06 6:05 ` [PATCH 11/11] hlist-bl: introduced nested locking for dm-snap Dave Chinner
2023-12-07 17:08 ` [PATCH 0/11] vfs: inode cache scalability improvements Kent Overstreet
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