linux-kernel - Re: [PATCH] erofs: fix PSI memstall accounting

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Message-ID: <CAKPOu+8=ys1YMvGhmqjCru76jD6qah+0JXQo9-ChqhD7YxEavw@mail.gmail.com>
Date: Tue, 3 Dec 2024 09:20:15 +0100
From: Max Kellermann <max.kellermann@...os.com>
To: Gao Xiang <hsiangkao@...ux.alibaba.com>
Cc: linux-erofs@...ts.ozlabs.org, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] erofs: fix PSI memstall accounting

On Tue, Dec 3, 2024 at 9:15 AM Gao Xiang <hsiangkao@...ux.alibaba.com> wrote:
> But I guess you could record more frame addresses to get the caller
> of readahead_expand()? e.g. __builtin_return_address(1)?

ok, I'll try to figure that out.

> Also btw, is _RET_IP_ stable among all cases as readahead_expand()?

Yes, always the same address.