From: Matthew Wilcox <willy@infradead.org>
To: Brendan Jackman <jackmanb@google.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Michal Hocko <mhocko@suse.com>,
David Rientjes <rientjes@google.com>,
Shakeel Butt <shakeel.butt@linux.dev>,
Vlastimil Babka <vbabka@kernel.org>,
Suren Baghdasaryan <surenb@google.com>,
Johannes Weiner <hannes@cmpxchg.org>, Zi Yan <ziy@nvidia.com>,
Harry Yoo <harry.yoo@oracle.com>, Hao Li <hao.li@linux.dev>,
Christoph Lameter <cl@gentwo.org>,
Roman Gushchin <roman.gushchin@linux.dev>,
Uladzislau Rezki <urezki@gmail.com>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [PATCH 0/5] mm: Switch gfp_t to unsigned long
Date: Thu, 19 Mar 2026 21:39:02 +0000 [thread overview]
Message-ID: <abxs9k__wWWLL2hb@casper.infradead.org> (raw)
In-Reply-To: <DH6Z95PTZYVF.3K64RCJC06GEJ@google.com>
On Thu, Mar 19, 2026 at 06:40:59PM +0000, Brendan Jackman wrote:
> I will paste the diff at the bottom. I _think_ all the problematic
> expansions are downstream of struct xarray, but it's quite likely my
> sense for problematic struct expansions is weak.
Urgh, no, it's not all xarray. There's one in address_space which we're
trying to shrink, not grow. There's one in struct sock too.
I don't think this idea is worth it. There are other projects of greater
or lesser churniess which will give us some flags back. For example,
we could finish the GFP_NOFS and GFP_NOIO removal. We could finish the
radix_tree -> XArray removal and get back three bits. That's five bits
without even starting new projects, just finishing old ones.
next prev parent reply other threads:[~2026-03-19 21:39 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-19 16:03 [PATCH 0/5] mm: Switch gfp_t to unsigned long Brendan Jackman
2026-03-19 16:03 ` [PATCH 1/5] drm/managed: Use special gfp_t format specifier Brendan Jackman
2026-03-19 16:03 ` [PATCH 2/5] iwlegacy: 3945-mac: " Brendan Jackman
2026-03-19 16:03 ` [PATCH 3/5] mm/kfence: " Brendan Jackman
2026-03-19 16:03 ` [PATCH 4/5] net/rds: " Brendan Jackman
2026-03-19 16:03 ` [PATCH 5/5] mm: Change gfp_t to unsigned long Brendan Jackman
2026-03-22 13:25 ` kernel test robot
2026-03-22 15:39 ` kernel test robot
2026-03-22 18:47 ` kernel test robot
2026-03-19 16:56 ` [PATCH 0/5] mm: Switch " Matthew Wilcox
2026-03-19 18:40 ` Brendan Jackman
2026-03-19 21:39 ` Matthew Wilcox [this message]
2026-03-20 9:48 ` Brendan Jackman
2026-03-20 10:02 ` Vlastimil Babka (SUSE)
2026-03-20 13:22 ` Brendan Jackman
2026-03-19 17:03 ` Vlastimil Babka (SUSE)
2026-03-19 17:38 ` Brendan Jackman
2026-03-19 19:58 ` Vlastimil Babka (SUSE)
2026-03-20 9:56 ` Brendan Jackman
2026-03-19 18:30 ` Zi Yan
2026-03-20 9:37 ` Brendan Jackman
2026-03-20 16:26 ` Andrew Morton
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