Re: [RESEND][PATCH 2/3 BUG,RFC] ext3: release block-device-mapping buffer_heads which have the filesystem private data for avoiding oom-killer

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Hi Ted,
Thanks for your comments.

> Hi Toshijuki,
>
> My apologizes for not getting back to you sooner.  My travel schedule
Never mind.

> has been a little crazy lately, including being in Japan last week
> speaking at the Japan Linux Symposium.
>
> Your patch series looks good, but I have one comment, for the ext3 and
> ext4 patches:
>
> > +	if (journal != NULL)
> > +		return journal_try_to_free_buffers(journal, page, wait);
> > +	else
> > +		return try_to_free_buffers(page);
>
> According to the documentation for journal_try_to_free_buffers():
>
>  * This function returns non-zero if we wish try_to_free_buffers()
>  * to be called. We do this if the page is releasable by try_to_free_buffers().
>  * We also do it if the page has locked or dirty buffers and the caller wants
>  * us to perform sync or async writeout.
I forgot reading it.

>
> So I think the last conditional in ext3_release_metadata() needs to be
> changed to be like this:
>
> +	if ((journal != NULL) &&
> +	    (journal_try_to_free_buffers(journal, page, wait) == 0))
> +		return 0;
> +	return try_to_free_buffers(page);
>
> A similar change should be made in the ext4 version of the patch.
> Does that sound OK to you?
Yes.

I will make and repost a revised patch which reflects your comments later.

>
> Regards,
>
> 						- Ted

Thanks again,
Toshiyuki Okajima

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