==> On Fri, 29 Dec 2006 17:34:26 -0800, "Chen, Kenneth W" <[EMAIL PROTECTED]>
said:
Kenneth> An AIO bug was reported that sleeping function is being called in
softirq
Kenneth> context:
Kenneth> The real problem is that the condition check of ctx->reqs_active in
Kenneth> wait_for_all_aios() is i
An AIO bug was reported that sleeping function is being called in softirq
context:
BUG: warning at kernel/mutex.c:132/__mutex_lock_common()
Call Trace:
[] __mutex_lock_slowpath+0x640/0x6c0
[] mutex_lock+0x20/0x40
[] flush_workqueue+0xb0/0x1a0
[] __put_ioctx+0xc0/0x240
[] a
[EMAIL PROTECTED] wrote on Thursday, December 21, 2006 9:35 AM
> kenneth.w.chen> Take ioctx_lock is one part, the other part is to move
> kenneth.w.chen> spin_unlock_irqrestore(&ctx->ctx_lock, flags);
> kenneth.w.chen> in aio_complete all the way down to the end of the
> kenneth.w.chen> funct
==> Regarding RE: [patch] aio: fix buggy put_ioctx call in aio_complete; "Chen,
Kenneth W" <[EMAIL PROTECTED]> adds:
kenneth.w.chen> [EMAIL PROTECTED] wrote on Thursday, December 21, 2006 8:56
kenneth.w.chen> AM I think I'm going to abandon this whole synchronize
k
[EMAIL PROTECTED] wrote on Thursday, December 21, 2006 8:56 AM
> kenneth.w.chen> I think I'm going to abandon this whole synchronize thing
> kenneth.w.chen> and going to put the wake up call inside ioctx_lock spin
> kenneth.w.chen> lock along with the other patch you mentioned above in the
> kennet
==> Regarding RE: [patch] aio: fix buggy put_ioctx call in aio_complete; "Chen,
Kenneth W" <[EMAIL PROTECTED]> adds:
kenneth.w.chen> I think I'm going to abandon this whole synchronize thing
kenneth.w.chen> and going to put the wake up call inside ioctx_lock spin
k
Andrew Morton wrote on Thursday, December 21, 2006 12:18 AM
> Alas, your above description doesn't really tell us what the bug is, so I'm
> at a bit of a loss here.
>
> http://marc.theaimsgroup.com/?l=linux-aio&m=116616463009218&w=2>
>
> So that's a refcounting bug. But it's really a locking bug
On Wed, 20 Dec 2006 23:58:43 -0800
"Chen, Kenneth W" <[EMAIL PROTECTED]> wrote:
> Andrew Morton wrote on Wednesday, December 20, 2006 8:06 PM
> > On Tue, 19 Dec 2006 13:49:18 -0800
> > "Chen, Kenneth W" <[EMAIL PROTECTED]> wrote:
> > > Regarding to a bug report on:
> > > http://marc.theaimsgroup.c
Andrew Morton wrote on Wednesday, December 20, 2006 8:06 PM
> On Tue, 19 Dec 2006 13:49:18 -0800
> "Chen, Kenneth W" <[EMAIL PROTECTED]> wrote:
> > Regarding to a bug report on:
> > http://marc.theaimsgroup.com/?l=linux-kernel&m=116599593200888&w=2
> >
> > flush_workqueue() is not allowed to be ca
On Tue, 19 Dec 2006 13:49:18 -0800
"Chen, Kenneth W" <[EMAIL PROTECTED]> wrote:
> Regarding to a bug report on:
> http://marc.theaimsgroup.com/?l=linux-kernel&m=116599593200888&w=2
>
> flush_workqueue() is not allowed to be called in the softirq context.
> However, aio_complete() called from I/O
Regarding to a bug report on:
http://marc.theaimsgroup.com/?l=linux-kernel&m=116599593200888&w=2
flush_workqueue() is not allowed to be called in the softirq context.
However, aio_complete() called from I/O interrupt can potentially call
put_ioctx with last ref count on ioctx and trigger a bug war
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