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Linux: increase max nvlist_src size

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On Linux increase the maximum allowed size of the src nvlist which
can be passed to the /dev/zfs ioctl.  Originally, this was set
to a maximum of KMALLOC_MAX_SIZE (4M) because it was kmalloc'd.
Since that time it's been converted to a vmalloc so that's no
longer a hard limit, and it's desirable for `zfs send/recv` to
allow larger nvlists so more snapshots can be sent at once.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #6572
Closes #11638
This commit is contained in:
Brian Behlendorf
2021-02-24 09:57:18 -08:00
committed by GitHub
parent f01eaed455
commit 1dfc82a14e
2 changed files with 2 additions and 2 deletions
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module/os/linux/zfs/zfs_ioctl_os.c
+1 -1
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@@ -209,7 +209,7 @@ zfs_max_nvlist_src_size_os(void)
if (zfs_max_nvlist_src_size != 0)
return (zfs_max_nvlist_src_size);
return (KMALLOC_MAX_SIZE);
return (MIN(ptob(zfs_totalram_pages) / 4, 128 * 1024 * 1024));
}
void