On Wed, 2024-05-01 at 23:50 -0400, Steven Rostedt wrote:
>
> External email : Please do not click links or open attachments until
> you have verified the sender or the content.
> On Thu, 2 May 2024 03:10:24 +
> Tze-nan Wu (吳澤南) wrote:
>
> > >
> > Sorry for my late reply, I'm testi
On Wed, 2024-05-01 at 23:50 -0400, Steven Rostedt wrote:
>
> External email : Please do not click links or open attachments until
> you have verified the sender or the content.
> On Thu, 2 May 2024 03:10:24 +
> Tze-nan Wu (吳澤南) wrote:
>
> > >
> > Sorry for my late reply, I'm testi
On 30 Apr 21:25, David Hildenbrand wrote:
> > I tried to get the hugepd stuff right but this was the first I heard
> > about it :-) Afaict follow_huge_pmd and friends were already DTRT
>
> I'll have to have a closer look at some details (the hugepd writability
> check looks a bit odd), but it's mo
On Thu, 2 May 2024 03:10:24 +
Tze-nan Wu (吳澤南) wrote:
> >
> Sorry for my late reply, I'm testing the patch on my machine now.
> Test will be done in four hours.
>
> There's something I'm worrying about in the patch,
> what I'm worrying about is commented in the code below.
>
> /kernel/t
On Thu, May 02, 2024 at 11:05:01AM +0900, Masami Hiramatsu wrote:
> On Wed, 1 May 2024 16:12:37 -0700
> "Paul E. McKenney" wrote:
>
> > Note that the immediate pressure for this patch should be relieved by the
> > NAPI patch series [1], but this sort of problem could easily arise again.
> >
> >
On Mon, 2024-04-29 at 14:46 -0400, Steven Rostedt wrote:
>
> External email : Please do not click links or open attachments until
> you have verified the sender or the content.
> On Sun, 28 Apr 2024 20:28:37 -0400
> Steven Rostedt wrote:
>
> > > Looking for any suggestion or solution, ap
From: "Steven Rostedt (Google)"
The events directory gets its permissions from the root inode. But this
can cause an inconsistency if the instances directory changes its
permissions, as the permissions of the created directories under it should
inherit the permissions of the instances directory w
From: "Steven Rostedt (Google)"
Treat the events directory the same as other directories when it comes to
permissions. The events directory was considered different because it's
dentry is persistent, whereas the other directory dentries are created
when accessed. But the way tracefs now does its
From: "Steven Rostedt (Google)"
The toplevel events directory is really no different than the events
directory of instances. Having the two be different caused
inconsistencies and made it harder to fix the permissions bugs.
Make all events directories act the same.
Cc: sta...@vger.kernel.org
Fi
From: "Steven Rostedt (Google)"
If the instances directory's permissions were never change, then have it
and its children use the mount point permissions as the default.
Currently, the permissions of instance directories are determined by the
instance directory's permissions itself. But if the t
The tracefs and eventfs permissions are created dynamically based
on what the mount point inode has or the instances directory inode has.
But the way it worked had some inconsistencies that could lead to
security issues as the file system is not behaving like admins would
expect.
The files and d
From: "Steven Rostedt (Google)"
There's an inconsistency with the way permissions are handled in tracefs.
Because the permissions are generated when accessed, they default to the
root inode's permission if they were never set by the user. If the user
sets the permissions, then a flag is set and t
On Wed, 1 May 2024 16:12:37 -0700
"Paul E. McKenney" wrote:
> Note that the immediate pressure for this patch should be relieved by the
> NAPI patch series [1], but this sort of problem could easily arise again.
>
> When running heavy test workloads with KASAN enabled, RCU Tasks grace
> periods
On Mon, 29 Apr 2024 15:55:09 +0200
Markus Elfring wrote:
> …
> > > it jumps to the label 'out' instead of 'fail' by mistake.In the result,
> …
> >
> > Looks good to me.
>
> * Do you care for a typo in this change description?
>
> * Would you like to read any improved (patch) version description
Note that the immediate pressure for this patch should be relieved by the
NAPI patch series [1], but this sort of problem could easily arise again.
When running heavy test workloads with KASAN enabled, RCU Tasks grace
periods can extend for many tens of seconds, significantly slowing
trace registr
Hello,
syzbot has tested the proposed patch and the reproducer did not trigger any
issue:
Reported-and-tested-by: syzbot+98edc2df894917b34...@syzkaller.appspotmail.com
Tested on:
commit: f138e94c KASAN: slab-use-after-free Read in vhost_task..
git tree: https://git.kernel.org/pub
On Wed, May 01, 2024 at 10:57:38AM -0500, Mike Christie wrote:
> On 5/1/24 2:50 AM, Hillf Danton wrote:
> > On Wed, 1 May 2024 02:01:20 -0400 Michael S. Tsirkin
> >>
> >> and then it failed testing.
> >>
> > So did my patch [1] but then the reason was spotted [2,3]
> >
> > [1] https://lore.kernel
#syz test https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git
f138e94c1f0dbeae721917694fb2203446a68ea9
On Wed, May 01, 2024 at 10:57:38AM -0500, Mike Christie wrote:
> On 5/1/24 2:50 AM, Hillf Danton wrote:
> > On Wed, 1 May 2024 02:01:20 -0400 Michael S. Tsirkin
> >>
> >> and then it failed testing.
> >>
> > So did my patch [1] but then the reason was spotted [2,3]
> >
> > [1] https://lore.kernel
On 5/1/24 2:50 AM, Hillf Danton wrote:
> On Wed, 1 May 2024 02:01:20 -0400 Michael S. Tsirkin
>>
>> and then it failed testing.
>>
> So did my patch [1] but then the reason was spotted [2,3]
>
> [1] https://lore.kernel.org/lkml/20240430110209.4310-1-hdan...@sina.com/
> [2] https://lore.kernel.org
On Wed, May 01, 2024 at 12:51:51PM +0200, Peter Zijlstra wrote:
> On Tue, Apr 30, 2024 at 12:50:05PM +0200, Tobias Huschle wrote:
> > It took me a while, but I was able to figure out why EEVDF behaves
> > different then CFS does. I'm still waiting for some official confirmation
> > of my assumptio
On Tue, 30 Apr 2024 14:23:27 -0400
Steven Rostedt wrote:
> From: "Steven Rostedt (Google)"
>
> Synthetic events create and destroy tracefs files when they are created
> and removed. The tracing subsystem has its own file descriptor
> representing the state of the events attached to the tracefs
On Tue, Apr 30, 2024 at 12:50:05PM +0200, Tobias Huschle wrote:
> It took me a while, but I was able to figure out why EEVDF behaves
> different then CFS does. I'm still waiting for some official confirmation
> of my assumptions but it all seems very plausible to me.
>
> Leaving aside all the spe
On Wed, 1 May 2024 02:01:20 -0400 Michael S. Tsirkin
>
> and then it failed testing.
>
So did my patch [1] but then the reason was spotted [2,3]
[1] https://lore.kernel.org/lkml/20240430110209.4310-1-hdan...@sina.com/
[2] https://lore.kernel.org/lkml/20240430225005.4368-1-hdan...@sina.com/
[3]
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