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Differential D46783

mbuf: Don't force all M_EXTPG mbufs to be read-only
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Authored by jhb on Sep 25 2024, 3:13 PM.
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gallatin
kp
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rG314cb279959b: mbuf: Don't force all M_EXTPG mbufs to be read-only
Summary

Some M_EXTPG mbufs are read-only (e.g. those backing sendfile
requests), but others are not. Add a flags argument to
mb_alloc_ext_pgs that can be used to set M_RDONLY when needed rather
than setting it unconditionally. Update mb_unmapped_to_ext to
preserve M_RDONLY from the unmapped mbuf.

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Repository
rG FreeBSD src repository
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Build Status
Buildable 59593
Build 56480: arc lint + arc unit

Revision Contents
Changeset List

PathSize
sys/
dev/
cxgbe/
cxgbei/
2 lines
tom/
2 lines
iscsi/
2 lines
nvmf/
2 lines
fs/
nfsclient/
2 lines
kern/
9 lines
2 lines
4 lines
sys/
2 lines

Diff 143714

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sys/dev/cxgbe/cxgbei/icl_cxgbei.c

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sys/dev/cxgbe/tom/t4_cpl_io.c

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sys/dev/iscsi/icl_soft.c

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sys/dev/nvmf/nvmf_tcp.c

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sys/fs/nfsclient/nfs_clrpcops.c

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sys/kern/kern_mbuf.c

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sys/kern/kern_sendfile.c

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sys/kern/uipc_mbuf.c

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sys/sys/mbuf.h

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