net: mana: Use per-queue allocation for tx_qp to reduce allocation size

Browse source

Convert tx_qp from a single contiguous array allocation to per-queue
individual allocations. Each mana_tx_qp struct is approximately 35KB.
With many queues (e.g., 32/64), the flat array requires a single
contiguous allocation that can fail under memory fragmentation.

Change mana_tx_qp *tx_qp to mana_tx_qp **tx_qp (array of pointers),
allocating each queue's mana_tx_qp individually via kvzalloc. This
reduces each allocation to ~35KB and provides vmalloc fallback,
avoiding allocation failure due to fragmentation.

Signed-off-by: Aditya Garg <gargaditya@linux.microsoft.com>
Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com>
Link: https://patch.msgid.link/20260502074552.23857-2-gargaditya@linux.microsoft.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

...

This commit is contained in:

Aditya Garg 2026-05-02 00:45:33 -07:00 • committed by Jakub Kicinski

parent 561e066284

commit d07efe5a6e

4 changed files with 33 additions and 22 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

2

drivers/net/ethernet/microsoft/mana/mana_bpf.c

View file

49

drivers/net/ethernet/microsoft/mana/mana_en.c

View file

2

drivers/net/ethernet/microsoft/mana/mana_ethtool.c

View file

2

include/net/mana/mana.h

View file